Guangzhou Changfeng Steel Co., LTD
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High Tensile Hot Rolled SAE4140 / SCM440 / 1.7225 Mold Steel Plate
SAE4140 mold steel plate is an alloy structural steel, it has good machinability, processing deformation is small, 4140 alloy structural steel fatigue resistance is quite good, is a medium hardenability steel.
After heat treatment, it has good strength and good mechanical properties, good workmanship, high yield.
The maximum temperature is 427 degrees Celsius.
Equivalent grades
| GB(China) | DIN(German) | AISI(USA) | JIS(Japan) |
| 42CrMo | 1.7225 | SAE4140 | SCM440 |
Chemical Composition(%)
| C | Si | Mn | Cr | P | S | Mo |
| 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | ≤0.035 | ≤0.035 | 0.15-0.25 |
Feature
1. High strength
2. High hardenability
3. Good toughness,
4. Small deformation during quenching,
5. High creep strength and long-lasting strength at high temperatures.
Applications
Used in the manufacture of high strength, large cross-section forgings such as supercharger transmission gear,rear axle, hummar shank etc.
Recommend heat treatment
| Quenching | Tempering | ||||
| Heating temperature/℃ | Cooling way | Hardness (HRC) | Tempering temperature /ºC | Cooling way | Hardness (HRC) |
| 850-880 | Oil Cooling | ≥53 | 450-650 | Air cooling | 25-40 |
Available size(mm)
| Flat Bar Size(mm) | Round bar Size(mm) | |||
| Thickness | Width | Length | Diameter | Length |
| 10-200 | 155-2200 | 2000-6000 | 20-200 | 3000-6000 |
Mechanical Properties:
Tensile strength:σb (MPa): ≥1080(110)
Yield strength:σs (MPa): ≥930(95)
Elongation:δ5 (%): ≥12
Section shrinkage:ψ (%): ≥45
Impact work:Akv (J): ≥63
Impact toughness value:αkv (J/cm²): ≥78(8)
Standards and Practices:
Bars & Forgings – To comply with all requirements of the latest edition of the Standards of the Society of Automotive Engineers for SAE 4140 steel.
Plates – To comply with all requirements of the latest edition of the Steel Products Manual of the Iron and Steel Society of AIME, for 4140 alloy steel plate.
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