24 July 2021 Gear Steel Bar
37SiMn2MoV Gear Steel Bar
37SiMn2MoV is a high level quenched and tempered steel with excellent comprehensive properties, high hardenability, and high strength and toughness. Commonly used in the manufacture of large cross-section and heavy-load quenched and tempered parts and surface hardened parts, such as heavy machinery shafts, gears, rotors, connecting rods and high-pressure seamless steel pipes, etc., used as high-pressure vessels, large bolts, etc. in petrochemical industry.
This steel working temperature range is -20-520℃. It can be used to make large bolt fasteners with working temperature below 450℃. It can also be used in replacing of 35CrMo, 40CrNiMo and other steels.
This steel can be used for ultra-high temperature after quenching. High-strength steel is used. The temperature range of this steel is -20-520℃. This steel can be used for ultra-high temperature after quenching. High-strength steel is used.
Chemical Composition:
| C | Si | Mn | S | P | Cr | Ni | Cu | V | Mo |
| 0.33~0.39 | 0.60~0.90 | 1.60~1.90 | ≤0.35 | ≤0.35 | ≤0.30 | ≤0.30 | ≤0.30 | 0.05~0.12 | 0.40~0.50 |
Mechanical Properties:
| Tensile strength σb (MPa): | Yield strength σs (MPa): | Elongation δ5 (%): | Reduction of area ψ (%): | Impact energy Akv (J): | Impact toughness value αkv (J/cm2): | Hardness: |
| ≥980(100) | ≥835(85) | ≥12 | ≥50 | ≥63 | ≥78(8) | ≤269HB |
Heat treatment specification and metallographic structure:
Heat treatment specification: quenching 870℃, water cooling, oil cooling; tempering 650℃, water cooling, air cooling.
Delivery status:
Delivery in the heat treatment (normalizing, annealing or high temperature tempering) or non-heat treatment status, the delivery status should be indicated in the contract.