ASTM A199 is a standard specification for seamless cold-drawn intermediate alloy steel heat-exchanger and condenser tubes.
Table of Contents
ASTM A199 specification covers several grades of ferritic steel, including Grade T5, Grade T9, Grade T11, Grade T22, and Grade T91.
Scope of ASTM A199
ASTM A199 specification covers minimum-wall-thickness, seamless cold-drawn intermediate alloy steel tubes intended for use in heat exchangers, condensers, and similar heat transfer apparatus. These tubes are used for transporting fluids and gases at high temperatures and pressures.
The grades of steel covered by ASTM A199 are commonly used in industries such as petrochemical, power generation, and chemical processing, where high-temperature performance and resistance to corrosion are required. The choice of grade depends on several factors, including the specific application, environmental conditions, and required mechanical properties.
ASTM A199 tubes are produced using various manufacturing processes, including hot finished or cold-finished, and the tubes are then subjected to various tests such as flattening test, hydrostatic test or nondestructive electric test to ensure they meet the specified requirements.
Overall, ASTM A199 tubes are an important component of industrial heat transfer systems, providing a safe and efficient means for transporting fluids and gases at high temperatures and pressures.
ASTM A199 covers several grades of minimum-wall-thickness, chromium-molybdenum and chromium-molybdenum-silicon, seamless, cold-drawn, intermediate alloy steel tubes for heat exchanger, condensers, and similar heat transfer apparatus. The tubing sizes usually furnished to this specification are 1/8 to 3 in. [3.2 to 76.2 mm) in outside diameter. Tubing having other dimensions may be furnished provided such tubes comply with all other requirements of this specification.
Mechanical properties requirements do not apply to tubing smaller than 1/8 in [3.2 mm] in inside diameter or 0.015 in [0.4mm] in thickness.
The values stated in either inch-pound units or SO units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
The ASTM A119 pressure boiler tube is wrapped with nylon fabric then bundled with 2 steel strips in each end, and other 2 in the middle.
Main grade we supply for ASTM A199
- ASTM A199 T11
- ASTM A199 T22
- ASTM A199 T5
Delivery Condition:
Heat treatment, Annealed, Normalized, Normalized and Tempered
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Painting as requested.
Chemical analysis (%) of ASTM A199
| Steel grade | WT | C | Mn | P (max) | S (max) | Si | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
| ASTM A199/T4 | MW | 0.15MAX | 0.30-0.60 | 0.03 | 0.03 | 0.50-1.00 | 2.15-2.85 | 0.44-0.65 |
| ASTM A199/T5 | MW | 0.50-0.15 | 0.30-0.60 | 0.03 | 0.03 | 0.50MAX | 4.00-6.00 | 0.45-0.65 |
| ASTM A199/T7 | MW | 0.15MAX | 0.30-0.60 | 0.03 | 0.03 | 0.50-1.00 | 6.00-8.00 | 0.45-0.65 |
| ASTM A199/T9 | MW | 0.15MAX | 0.30-0.60 | 0.03 | 0.03 | 0.25-1.00 | 8.00-10.0 | 0.90-1.10 |
| ASTM A199/T11 | MW | 0.50-0.15 | 0.30-0.60 | 0.03 | 0.03 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| ASTM A199/T22 | MW | 0.50-0.15 | 0.30-0.60 | 0.03 | 0.03 | 0.50MAX | 1.90-2.60 | 0.87-1.13 |
Mechnical properties of ASTM A199
| Steel grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | SPECIFIC REQUIREMENT |
|---|---|---|---|---|
| ASTM A199/T4 | 415MIN | 170MIN | 30/22 | Hardness 85 HRB MAX |
| ASTM A199/T5 | 415MIN | 170MIN | 30/22 | Hardness 85 HRB MAX |
| ASTM A199/T7 | 415MIN | 170MIN | 30/22 | Hardness 85 HRB MAX |
| ASTM A199/T9 | 415MIN | 170MIN | 30/22 | Hardness 85 HRB MAX |
| ASTM A199/T11 | 415MIN | 170MIN | 30/22 | Hardness 85 HRB MAX |
| ASTM A199/T22 | 415MIN | 170MIN | 30/22 | Hardness 85 HRB MAX |
Usage
Steel pipe are ubiquitous and can be found underground and within residential walls, laboratories, and commercial and industrial structures. Seamless steel pipe transport fluids including water, natural gas, waste and air. Three manufacturing methods exist to produce steel pipes.
Seamless steel pipes are produced using an extrusion mold. Welded steel pipes are produced by rolling a sheet of steel into a tube and welding the seam. Seamless steel pipes are less expensive. The third method is casting. Molten steel is poured into a casting mold.
Our steel pipes and tubes are the preferred choice for processes under the following conditions:
- high temperatures
- aggressive media (e.g. acid and lye)
- and/or high pressure