Active Member
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[China]
Address: 广州市黄埔区大沙地东路403号B802房(仅限办公）
Contact name:Echo
Guangzhou Changfeng Steel Co., LTD |
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1.7225/SAE4140/SCM440/42CrMo4 Alloy Steel Bar for mechanical
Introduction
42CrMo steel is an ultra-high strength steel with high strength and
toughness, good hardenability, no obvious temper brittleness, high
fatigue limit and multiple impact resistance after quenching and
tempering, and good low temperature impact toughness.
Steel Grade
| Chinese | American | German | Japanese | ||||||
| GB | AISI | DIN | JIS | ||||||
| 42CrMo | SAE4140 | 1.7225 | SCM440 | ||||||
Chemical composition%
| Grades | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 4140 | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.9-1.2 | 0.15-0.25 | ≤0.3 | ≤0.035 |
| 42CrMo | 0.38-0.45 | 0.17-0.35 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.9-1.2 | 0.15-0.25 | ≤0.03 | ≤0.03 |
| 440 | 0.38-0.43 | 0.15-0.35 | 0.6-0.85 | ≤0.03 | ≤0.03 | 0.9-1.2 | 0.15-0.3 | ≤0.3 | ≤0.25 |
Heating treatment
| Quenching | Tempering | ||||||||
| Heating Temperature/ºC | Cooling | Hardness/HRC | Heating Temperature/ºC | Cooling | Hardness/HRC | ||||
| 820-840 | Oil | ≥53 | 450-650 | Air | 25-40 | ||||
Available Sizes
| steel plate | Thickness | 20-120mm | |||||||
| Width | 2200mm | ||||||||
| Length | 4000-10000mm | ||||||||
| round bar | Diameter | 16-450mm | |||||||
| Length | 4000-10000mm | ||||||||
Features
1) Weldability suffers with increasing chromium content;
2) High temperature strength and high pressure hydrogenation
properties are promoted by chromium and molybdenum;
3) Molybdenum significantly reduces temper brittleness;
4) Chromium renders steel oil hardenable and increase
hardenability;
5) Chromium molybdenum high tensile steel with yield strength of
550N/mm2
Applications
1) Suitable for manufacturing requirment a certain strength and
toughness of large and medium-sized plastic mold, such as
locomotive traction with the big gear, the supercharger drive gear,
pressure vessle, rear axle, gear load connecting rod and a spring
clip
2) Used to under 2000m deep well of oil drill pipe joint and the
fishing tool
3)Used for bending machine mould
More product pictures
Strictly Quality Control
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