40CrNiMo Steel
- GB/T 3077
- China
- Stock
- 40CrNiMo Steel
40CrNiMo seamless steel pipe 40CrNiMo steel has high strength, toughness, good hardenability and stability against overheating, but it has high white point sensitivity and temper brittleness. Weldability is poor, high temperature preheating
40CrNiMo Steel
40CrNiMo seamless steel pipe
40CrNiMo steel has high strength, toughness, good hardenability and stability against overheating, but it has high white point sensitivity and temper brittleness. Weldability is poor, high temperature preheating is required before welding, stress relief after welding, and use after quenching and tempering.
Name: 40CrNiMoA
Advantages: hardenability and stability against overheating
Application: shafts, gears, fasteners, etc.
Raw materials: carbon, silicon, manganese, etc.
Chemical properties
| Grade | Chemical properties(%) | ||||||||
| C | Si | Mn | S | P | Cr | Ni | Cu | Mo | |
| 40CrNiMo | 0.37~0.44 | 0.17~0.37 | 0.50～0.80 | ≤0.025 | ≤0.025 | 0.60～0.90 | 1.25～1.65 | ≤0.25 | 0.15～0.25 |
Mechanical properties
| Grade | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) | Reduction of area | Impact energy (J) | Impact toughness (J / cm & sup2;) |
| 40CrNiMo | ≥980 | ≥835 | ≥12 | ≥55 | ≥78 | ≥98 |
Executive standard
GB/T 3077-1999 "Alloy Structural Steel"
Scope of application
Generally, important parts with high strength and good plasticity are made, and important parts with special performance requirements, such as shafts, gears, fasteners, etc., are made after nitriding treatment.
Delivery status
40CrNiMo seamless steel pipes are delivered with heat treatment (normalizing, annealing or high temperature tempering) or without heat treatment.
Heat treatment specification
Quenching at 850℃, oil cooling; tempering at 600℃, water cooling, oil cooling.
Product key description, this is a very good product description, detailing our product use, product characteristics
