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ASTM A335 P22 Seamless Pipe
ASTM A335 P22 Seamless Pipe is also known as the 2 ¼ chrome pipes. The material is a carbon steel with added chromium, molybdenum and vanadium at some instances. The chromium content is responsible for the added high temperature strength in the ASME SA335 Grade P22 Alloy Steel Pipe SCH 40 and other schedules.
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Description
ASTM A335 P22 Seamless Pipe is also known as the 2 ¼ chrome pipes. The material is a carbon steel with added chromium, molybdenum and vanadium at some instances. The chromium content is responsible for the added high temperature strength in the ASME SA335 Grade P22 Alloy Steel Pipe SCH 40 and other schedules.
The P22 Alloy Steel pipe has high resistance to wear and tear in the systems. The pipes have enhanced elastic limit with good impact resistance. The A335 P22 restrains grain growth and is highly susceptible to embrittlement. The grade also has good creep strength and resistance to pitting.
The A335 P22 material is designed with a minimum tensile strength of 415mpa and a minimum yield strength of 205mpa. SA335 P22 material is thereby a good choice in pharmaceutical equipment, chemical systems, heat exchangers, condensers, power generation, and other applications.
The P22 pipe suppliers supply pipes in standard sizes of 1/2 NB to 36 NB. These pipes are available in thickness range between SCH 40 to SCH 160 and XXS. The A335 Gr P22 pipes are designed in plain, bevelled, screwed, and threaded specifications.
A335/SA335 Grade P22 Alloy Steel Seamless Pipes are Carbon steel pipes with addition of chromium, molybdenum, and sometimes vanadium. Chromium, or chrome, improves high-temperature strength, increases oxidation resistance and raises the tensile, yield and hardness at room temperatures. Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive for increasing high temperature creep strength, or creep resistance, and it also enhances the corrosion resistance of steel and inhibits pitting. Grade P22 is used for high temperature service applications and is tolerant to variations in its microstructure.
Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices.
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.
A335 is often called chrome moly pipe because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel as well as the elastic limit, resistance to wear, impact qualities, and hardenability.
The range of ASTM A335 P22 pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.
The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.
- Outer Dimensions: 19.05mm – 114.3mm
- Wall Thickness: 2.0mm – 14 mm
- Length: max 16000mm
Steel grade: ASTM A335 P22
Packing:
Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.
Chemical Composition(%) ASTM A335
ASTM Specification pipe confirming to ASTM A335 shall have the following chemical properties. Tensile and Hardness Requirements The tensile properties of the ASTM A335 pipe shall conform to the requirements as prescribed. Pipe of Grades P91, P92, and P122 shall have a hardness not exceeding 250 HB/265 HV [25 HRC]. For pipe of Grades P91, P92, P122, and P911, Brinell, Vickers, or Rockwell hardness tests shall be made on a specimen from each lot (see Note 7). These pipe bear high resistance to rupture at high temperature and pressures. With hydrogen crack resistance and sulfide stress corrosion cracking chrome moly pipe are highly preferred over Carbon pipe.| Grade | UN | C≤ | Mn | P≤ | S≤ | Si≤ | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
| P1 | K11522 | 0.10~0.20 | 0.30~0.80 | 0.025 | 0.025 | 0.10~0.50 | – | 0.44~0.65 |
| P2 | K11547 | 0.10~0.20 | 0.30~0.61 | 0.025 | 0.025 | 0.10~0.30 | 0.50~0.81 | 0.44~0.65 |
| P5 | K41545 | 0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 4.00~6.00 | 0.44~0.65 |
| P5b | K51545 | 0.15 | 0.30~0.60 | 0.025 | 0.025 | 1.00~2.00 | 4.00~6.00 | 0.44~0.65 |
| P5c | K41245 | 0.12 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 4.00~6.00 | 0.44~0.65 |
| P9 | S50400 | 0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.50~1.00 | 8.00~10.00 | 0.44~0.65 |
| P11 | K11597 | 0.05~0.15 | 0.30~0.61 | 0.025 | 0.025 | 0.50~1.00 | 1.00~1.50 | 0.44~0.65 |
| P12 | K11562 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 0.80~1.25 | 0.44~0.65 |
| P15 | K11578 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 1.15~1.65 | – | 0.44~0.65 |
| P21 | K31545 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 2.65~3.35 | 0.80~1.60 |
| P22 | K21590 | 0.05~0.15 | 0.30~0.60 | 0.025 | 0.025 | 0.5 | 1.90~2.60 | 0.87~1.13 |
| P91 | K91560 | 0.08~0.12 | 0.30~0.60 | 0.02 | 0.01 | 0.20~0.50 | 8.00~9.50 | 0.85~1.05 |
| P92 | K92460 | 0.07~0.13 | 0.30~0.60 | 0.02 | 0.01 | 0.5 | 8.50~9.50 | 0.30~0.60 |
Chrome Moly Pipes: Werkstoff vs EN vs ASTM
ASTM A335 pipe may be either hot finished or cold drawn with the finishing treatment as required in Grade P2 and P12 – The steel shall be made by coarse- grain melting practice. Specific limits, if any, on grain size or deoxidation practice shall be a matter of agreement between the manufacturer and purchaser.| Werkstoff /DIN | EN | ASTM |
|---|---|---|
| 1.5415 | 16Mo3 | A335 Grade P1 |
| 1.7335 | 13CrMo4-5 | A335 Grade P11, P12 |
| 1.738 | 10CrMo9-10 | A335 Grade P22 |
| 1.7362 | X11CrMo5 | A335 Grade P5 |
| A335 Grade P9 | ||
| 1.4903 | X10CrMoVNb9-1 | A335 Grade P91 |
Tensile Requirements
| Tensile Strength, min., psi | P-5 | P-9 | P-11 | P-22 | P-91 |
|---|---|---|---|---|---|
| ksi | 60 | 60 | 60 | 60 | 85 |
| MPa | 415 | 415 | 415 | 415 | 585 |
| Yield Strength, min., psi | |||||
| ksi | 30 | 30 | 30 | 30 | 60 |
| MPa | 205 | 205 | 205 | 205 | 415 |
Note: ASTM A335 P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Mechanical properties of ASTM A335
| Grade | Tensile strength | Yield strength |
|---|---|---|
| P1,P2 | 380 | 205 |
| P12 | 415 | 220 |
| P23 | 510 | 400 |
| P91 | 585 | 415 |
| P92,P11 | 620 | 440 |
| P122 | 620 | 400 |
It also enhances the corrosion resistance of steel, and inhibits pitting. Chromium (or chrome) is the essential constituent of stainless steel. Any steel with 12% or more Chrome is considered stainless. Chrome is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome raises the tensile, yield, and hardness at room temperatures. The composition chrome moly alloy steel pipe make it ideal for use in power plants, refineries, petro chemical plants, and oil field services where fluids and gases are transported at extremely high temperatures and pressures.
Heat Treatment Requirements
| Grade | Heat Treatment Type P5, P9, P11, and P22 | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
|---|---|---|---|
| A335 P5 (b,c) | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (P5c only) | ***** | 1325 – 1375 [715 - 745] | |
| A335 P9 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| A335 P11 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1200 [650] | |
| A335 P22 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| A335 P91 | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
| Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
Material & Manufacture
Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.
Heat Treatment
- A / N+T
- N+T / Q+T
- N+T
Mechanical Tests Specified
- Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
- For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
- For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.
Notes for Hardness Test:
- P11 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Notes for Bend Test:
- For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
- Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
- The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.
ASTM A335 P22 steel Equivalent
| Equivalent material | ABS | BS | UNS | ISO | ASME | LRS | ASTM | DIN | JIS G 3458 | NK |
|---|---|---|---|---|---|---|---|---|---|---|
| T22, 10CrMo910, 10CrMo9-10, 1.7380, 11CrMo9-10, 1.7383 | ABS 13 | 3604 P1 622 | K21590 | 2604 II TS34 | SA335 P22 | Sec 2 2-1/4Cr1Mo410 |
A335 P22 | 17175 10CrMo910 |
STPA 24 | KSTPA 24 |
What is P22 Material Hardness Range?
|
Grade |
Impact energy(J) |
Hardness |
|
P22 |
≥ 35 |
≤ 163HB |
Heat Treatment of Steel Grade P22 Pipe
| Alloy Steel Pipe | |||
| Grade | Type of Heat Treatment | Temperature Range in F [C] of Normalizing | Tempering or Subcritical Annealing Range of Temperature F [C] |
| P22 | Isothermal or Full Anneal | ||
| Temper and Normalize | ***** | 1250 [675] |
Alloy Steel A335 P22 Pipe Chemical Composition
| S, % | Mo, % | P, % | C, % | Si, % | Cr, % | Mn, % |
| 0.025 max | 0.87-1.13 | 0.025 max | 0.015 max | 0.50 max | 1.90-2.60 | 0.30-0.61 |
SA 335 gr P22 Pipe Mechanical Properties
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
Uses of SA335 Gr P22
The SA 335 Gr P22 are suitable for high temperature and pressure condition that allows them to be used in different industries. SA335 Gr P22 grade is seen in chemical processing, specialty chemicals, sea water equipment, and pharmaceutical industries. The SA 335 P22 specification is also common in heat exchangers, condensers, offshore drilling companies, and power generation systems. An SA335 P22 grade can handle these toxic environments due to its superior strength and resistance.
Process
Cold drawn seamless steel tube deformed process
Cold Drawn Seamless Mechanical Tubing (CDS) is a cold drawn 1018/1026 steel tube which offers uniform tolerances, enhanced machinability and increased strength and tolerances compared to hot-rolled products.
Cold drawn steel tube is with hot-rolled steel coil as raw material, and tandem cold rolling pickled to remove oxide scale, its finished rolling hard roll, rolling hard volumes due to the continuous cold deformation caused by cold hardening strength, hardness increased indicators declined tough plastic, stamping performance will deteriorate, which can only be used for simple deformation of the parts.
Rolling hard roll can be used as the raw material of the hot-dip galvanizing plant, hot dip galvanizing line set annealing line. Rolling hard roll weight is generally 6 to 13.5 tons, the coil diameter of 610mm.
Hot rolled seamless steel pipe deformed process
Hot-rolled seamless steel pipe production base deformation process can be summarized as three stages: perforation, extension and finishing.
The main purpose of the perforation process is to become a solid round billet piercing hollow shell. Capillary in the specifications, accuracy and surface quality can not meet the requirements of the finished product, further improvements are needed to deform the metal through. The main purpose of the stretching machine is further reduced sectional view (main compression wall) for a larger axial extension, so that the capillary improved dimensional accuracy, surface quality and organizational performance.
After stretching machine rolled steel pipe shortage collectively need further molding mill in order to achieve the requirements of the finished pipe. Rolled steel due to pass in the method widely used in the production of seamless steel tubes.
So far, due to the method pass rolling steel can be divided into two categories: core pension without rolling rolling (hollow body rolling), and with the mandrel. Sizing machines, reducing mill and stretch reducing mill belonging to the hole without mandrel type continuous rolling mills are generally coffin. Its main purpose is to reduce the diameter of the deformation process or sizing get finished steel, the wall thickness of process control, can make thinning, thickening or nearly unchanged.
All the traditional hole-type rolling machine with mandrel belong to extend machine. The main purpose is to reduce the deformation process perforated capillary wall thickness and outer diameter roll passes in the deformation zone and the mandrel posed, for a larger axial extension. At the same time a certain improvement in the organization, performance, accuracy, surface quality.
Cut to Length
Before cutting pipe and tubing
No matter the material, measure the diameter of the pipe or tube to be cut to ensure that you use the right-size tube cutter for the job. When determining how to make a straight cut, use a tape measure and a pencil or other writing instrument to mark on the surface where you want to cut. If possible, mark around the circumference of a pipe, especially when cutting with a handsaw. Ensure that a cut is as straight as possible by securing the pipe with a vise, clamp, miter box or even duct tape to keep the length from shifting out of place while cutting.
After cutting pipe and tubing
- Unless a cut is perfectly clean, you should expect to remove burrs from around the edge, especially after sawing.
- Use a deburring tool to clean the edge after tube cutting.
- You may opt to use a metal file on the cut of a metal pipe.
Inspection
Inspection and test of alloy steel pipe:
Chemical composition inspection, mechanical properties test(tensile strength,yield strength, elongation, flaring, flattening, bending, hardness, impact test), surface and dimension test,no-destructive test, hydrostatic test.
PMI
Size measurement
Delivery
Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.
Placing steel pipes into containers
Application
Alloy steel pipes are ideally suitable for chemical, petrochemicals, and other energy-related applications.
The alloy steel pipe adopts high quality carbon steel, alloy structural steel and stainless & heat resisting steel as raw material through hot rolling or cold drawn to be made.
Alloy steel can be used in process area where carbon steel has limitation such as
- High-temperature services such as heater tubes
- Low-temperature services such as cryogenic application
- Very high presser service such as steam header
As an important element of steel products, alloy steel pipe can be divided into seamless steel pipe and welded steel pipe according to the manufacturing technique and tube billet shape.
Here you can see the common alloy steel grade that you will come across.
- For Pipes: ASTM A335 Gr P1, P5, P11, P9
- For Wrought Fittings: ASTM A234 Gr.WP5, WP9, WP11
- For Forged Fittings: ASTM A182 F5, F9, F11 etc.
Why the application of alloy steel pipe is wider than others
There are many kinds of materials used for transport in industrial production. Specifically we will have more choices and it is not limited to the use of alloy steel pipe. But even in the face of more choices, many people tend to choose alloy steel pipe. People make their own choices will have their own reasons. This means the alloy steel pipe application has its own advantages. Compared with transmission lines made of other materials, after it meets the basic application requirements, its quantity is lighter. Then in the practical application of alloy steel pipe, it will have more advantages because of this. Besides its physical characteristic advantage, it also has economic advantages. The wide application of alloy steel pipe is with kinds of reasons. So in practical usage, we can exploit the advantages to the full, in this way can we get more profits in these applications of alloy steel pipe.
What requirements should alloy steel pipe application meet
The transportation of kinds of gases or liquids in production needs to rely on alloy steel pipe. This shows that the actual role of alloy steel pipe application is important. High temperature resistant and low temperature resistant is the tolerance of temperature. In the practical application of alloy steel pipe, there will be many materials need to be transported. However their temperatures are not the same. So this can be the basic requirement to alloy steel pipe. It needs more corrosion resistance. Corrosion resistant material is the best material during transporting, because it is corrosion resistant. So it can be used in more occasions. And it is definitely very convenient for users.
The biggest advantages of alloy steel pipe
Can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion of the field of application of high-pressure alloy pipe. Of alloy steel pipe total consumption accounted steel in the proportion is only half of the developed countries, to expand the field of use of the alloy steel pipe to provide a wider space for the development of the industry. The future needs of the average annual growth of China’s high-pressure alloy steel pipe long products up to 10-12%.
Specification, standard and identification of alloy steel pipes
Alloy Steel pipe contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous.
Industries We Serve
Our team of experienced sales specialists proudly partners with gas and chemical processors, power generation plants, oil refineries, and related industries to offer piping components and value-added services.
The biggest advantages of alloy steel pipe can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion of the field of application of high-pressure alloy pipe. Of alloy tube total consumption accounted steel in the proportion is only half of the developed countries, to expand the field of use of the alloy tube to provide a wider space for the development of the industry. According to the Chinese Special Steel Association alloy pipe Branch Expert Group, the future needs of the average annual growth of China’s high-pressure alloy pipe long products up to 10-12%.
Q&A
Our team of experienced sales specialists proudly partners with gas and chemical processors, power generation plants, oil refineries, and related industries to offer piping components and value-added services.
Alloying Elements
| Alloying Elements | Effect on the Properties |
|---|---|
| Chromium | Increases Resistance to corrosion and oxidation. Increases hardenability and wear resistance. Increases high temperature strength. |
| Nickel | Increases hardenability. Improves toughness. Increases impact strength at low temperatures. |
| Molybdenum | Increases hardenability, high temperature hardness, and wear resistance. Enhances the effects of other alloying elements. Eliminate temper brittleness in steels. Increases high temperature strength. |
| Manganese | Increases hardenability. Combines with sulfur to reduce its adverse effects. |
| Vanadium | Increases hardenability, high temperature hardness, and wear resistance. Improves fatigue resistance. |
| Titanium | Strongest carbide former. Added to stainless steel to prevent precipitation of chromium carbide. |
| Silicon | Removes oxygen in steel making. Improves toughness. Increases hardness ability |
| Boron | Increases hardenability. Produces fine grain size. |
| Aluminum | Forms nitride in nitriding steels. Produces fine grain size in casting. Removes oxygen in steel melting. |
| Cobalt | Increases heat and wear resistance. |
| Tungsten | Increases hardness at elevated temperatures. Refines grain size. |
The most important and desired changes in alloy steel are
Alloy steels are made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions (or combinations) making the material take on different aspects such as increased hardness, increased corrosion resistance, increased strength, improved formability (ductility); the weldability can also change.
- Increased hardenability.
- Increased corrosion resistance.
- Retention of hardness and strength.
- Nearly all alloy steels require heat treatment in order to bring out their best properties.
Alloying Elements & Their Effects
- Chromium – Adds hardness. Increased toughness and wear resistance.
- Cobalt – Used in making cutting tools; improved Hot Hardness (or Red Hardness).
- Manganese – Increases surface hardness. Improves resistance to strain, hammering & shocks.
- Molybdenum – Increases strength. Improves resistance to shock and heat.
- Nickel – Increases strength & toughness. Improves corrosion resistance.
- Tungsten – Adds hardness and improves grain structure. Provides improved heat resistance.
- Vanadium – Increases strength, toughness and shock resistance. Improved corrosion resistance.
- Chromium-Vanadium – Greatly improved tensile strength. It is hard but easy to bend and cut.
Pipes, Tubes and Hollow Sections
Norms:
- API 5L – Line Pipe
- ASTM A 53 – Black and Hot-Dipped, Zinc-Coated, Welded and Seamless, Steel Pipe
- ASTM A 106 – Seamless Carbon Steel Pipe for High-Temperature Service
- ASTM A 213 – Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
- ASTM A 269 – Seamless and Welded Austenitic Stainless Steel Tubing for General Service
- ASTM A 312 – Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
- ASTM A 333 – Seamless and Welded Steel Pipe for Low-Temperature Service
- ASTM A 335 – Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
- ASTM A 358 – Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
- ASTM A 671 – Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
- ASTM A 672 – Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures
- ASTM A 790 – Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
- ASTM A 928 – Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
- EN 10208-2 – Steel pipes for pipelines for combustible fluids – Part 2: Pipes of requirement class B
- EN 10210-1/2 – Hot finished structural hollow sections of non-alloy and fine grain steels
- EN 10216-1 – Seamless steel tubes for pressure purposes – Part 1: Non-alloy steel tubes with specified room temperature properties
- EN 10216-2 – Seamless steel tubes for pressure purposes – Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
- EN 10217-1 – Welded steel tubes for pressure purposes – Part 1: Non-alloy steel tubes with specified room temperature properties
- EN 10217-2 – Welded steel tubes for pressure purposes – Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties
- EN 10219-1/2 – Cold formed welded structural hollow sections of non-alloy and fine grain steels
- EN 10297-1 – Seamless circular steel tubes for mechanical and general engineering purposes – Part 1 Non-alloy and alloy steel tubes
Grade:
- API 5L Gr. A, B, X42, X52, X60, X65, X70
- ASTM A 53 Gr. A, Gr. B
- ASTM A106 Gr. A, B, C
- ASTM A 213 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H, T5, T9, T11
- ASTM A 269 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H
- ASTM A 312 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H
- ASTM A 333 Gr. 3, Gr. 6 ASTM A 335 P1, P2, P5, P9, P11, P12, P22, P91, P92
- ASTM A 358 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H
- ASTM A 671 CC 60, CC 65, CC 70
- ASTM A 672 CC 60, CC 65, CC 70
- ASTM 790 UNS S31803, UNS S32205, UNS S32750, UNS S32760
- ASTM A928
- EN 10208-2 L245, L 290, L360
- EN 10210-1 S235 JRH, S275 JOH, S275 J2H, S355 JOH, S355 J2H
- EN 10216-1 P235 TR1/2
- EN 10216-2 P235 GH, P265 GH
- EN 10217-1 P235 TR1/2, P275 TR1/2
- EN 10217-2 P235 GH, P265 GH
- EN 10219-1 S235 JRH, S275 JOH, S275 J2H, S355 JOH, S355 J2H
- EN 10297-1 E235, E275, E315, E355, E470
Inquiry
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FAQ
Q: How long is your delivery time?
A: The delivery time of customized products is generally 25 35 days, and non customized products are generally shipped within 24 hours after payment.
Q: Do you provide samples? Is it free?
A: If the value of the sample is low, we will provide it for free, but the freight needs to be paid by the customer. But for some high value samples, we need to charge a fee.
Q: What are your payment terms?
A: T/T 30% as the deposit,The balance payment is paid in full before shipment
Q: What is the packaging and transportation form?
A: Non steaming wooden box and iron frame packaging. Special packaging is available according to customer needs. The transportation is mainly by sea.
Q: What is your minimum order quantity?
A: There is no minimum order quantity requirement. Customized products are tailor made according to the drawings provided by the customer.
