34CrMo4 Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 18-22 HRc.
34CrMo4 steel is a high quality tempered and tempered alloy structural steel, belongs to the high-quality steel with low carbon content, low alloy chromium, molybdenum and box-hardened nickel. & oil-cooled; The temperate hardness is 18-22 HRc. Annealing delivery hardens less than 250HB. With a lower carbon content range, it has good weldability.
Form of supply
34CrMo4 alloy steel, we can supply round bar, steel flat bar, plate, hexagonal steel bar and square steel block. The round steel bar can be sawn to the required lengths as single or multiple pieces. 34CrMo4 alloy steel Rectangular parts can be sawn from a flat bar or plate to their specific sizes. A rectified steel tool bar can be supplied, providing a bar with a quality precision finish for tight tolerances
Heat treatment related
Annealing of 34CrMo4 alloy structural steel
heated to 870 °C and leave enough time, let the steel heat up completely, then cool slowly in the furnace. 34CrMo4 alloy steel will get MAX 250 HB
Hardening of DIN 34CrMo4 alloy structural steel
First cooling is slowly heated to 880 ° C, then, after a suitable soak at this temperature, cool in oil or water. Tempering as soon as the tools reach room temperature. Second heat of cooling to 780-820 ° C, then cool in oil or water.
Alloy structural steel tempering 34CrMo4
Heat to 205-649 ° C, then cool in water or oil. normal delivery hardness 18-22 HRC.
34CrMo4 alloy steel forging
DIN 34CrMo4 alloy steel is forged at a temperature of 926 to 1205°C (1700 to 2200°F)
34CrMo4 Applications
Steel DIN 34CrMo4 Strength, high hardenability, toughness and tempering of small deformations, high strength and resistance to creep breakage at high temperatures. Requirements for higher intensity manufacturing than 35CrMo steel and hardened forging of higher cross-section, such as traction gears of a large locomotive, supercharger transmission gear, pressure vessels, gear, rear axle, greatly affected by load and spring link It can also Can be used for 2000m deep oil drilling pipe joints and fishing tools, and can be used to fold molds, etc.
What steel is equivalent to 34CrMo4?
SAE4130m is a low alloyed steel used in quenched and tempered condition. The nearest equivalents are 34CrMo4 in EN10083-3 or 4130 in ASTM A29 with some deviations.
| USA | Germany | China | Japan | France | England | Italy | Poland | ISO | Austria | Sweden | Spain |
| ASTM/AISI/UNS/SAE | DIN,WNr | GB | JIS | AFNOR | BS | UNI | PN | ISO | ONORM | SS | UNE |
| 4135 / G41350 | 34CrMo4 / 1.7220 | 35CrMo | SCM435 | 42CD4 | 708A37 | 34CrMo4 | 2234 | ||||
Heat treatment Related
- Annealing of 34CrMo4 Alloy structural steel
heated to 870 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The 34CrMo4 alloy steel will get MAX 250 HB
- Hardening of DIN Alloy structural steel 34CrMo4
First quenching heated slowly to 880°C, Then after adequate soaking at this temperature quench in oil or water. Temper as soon as tools reach room temperature. Second quenching heat to 780-820°C， then quenching in oil or water.
- Tempering of 34CrMo4 Alloy structural steel
Heat to 205-649°C, then cool in water or oil. normal delivery hardness 18-22 HRC.
- Forging of Alloy Steel 34CrMo4
DIN 34CrMo4 alloy steel is forged at 926 to 1205°C (1700 to 2200°F)
Mechanical Properties of 34CrMo4 Alloy Steel
The mechanical properties of annealed DIN 34CrMo4 alloy steel are outlined in the table below
| Tensile strength | Yield strength | Elongation | Reduction of area | Poisson’s ratio | Impact absorbing energy |
| σb/MPa | σs/MPa | δ5(％) | ψ(％) | AKV/J | |
| 1100-1300 | 900Min | 10 min | 40 min | 0.27-0.30 | 35 Min |
Applications of 34CrMo4
DIN 34CrMo4 steel Strength, high hardenability, toughness, and quenching small deformation, high strength and creep rupture strength at high temperatures. Requirements for the manufacture of higher intensity than the 35CrMo steel and tempered forging greater cross-section, such as a large locomotive traction gears, supercharger drive gear, pressure vessels, gear, rear axle, greatly affected by load and spring clip link It can also be used to 2000m deep oil drill pipe joints and fishing tools, and can be used bending machine mold, etc.