Round Bar Hot Rolled Alloy Steel Small Deformation During Quenching SCM440 / 1.7225
SCM440 / 1.7225 / SAE4140 Hot Rolled Alloy Steel with black surface
SAE4140 Hot Rolled Alloy Steel is an alloy structural steel
Equivalent grades
| GB(China) | DIN(German) | AISI(USA) | JIS(Japan) |
| 42CrMo | 1.7225 | SAE4140 | SCM440 |
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.
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 |
Applications
For the manufacture of steel with higher strength and quarry section than 35CrMo, such as locomotive traction gear, supercharger transmission gear, rear axle, heavy load connecting rod and spring clamp, can also be used 2000m below the deep oil drill pipe joints and salvage tools.
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.
More about Changfeng Steel
Guangzhou Changfeng Steel Co., Ltd is a mould steel stockist, we have our own mould steel factory and trading company. Our main steels are carbon tool steel, plastic mold steel, hot work tool steel, cold work tool steel, Hot Rolled alloy steel for mechanical, etc.
We provide all materials with high quality and competitive price.
Why Choose Us?
1. Competitive price and high quality
2. OEM/ODM order accept
3. Quick delivery and standard exporting package
4. Smooth production ability(1000tons/month)
5. Flexible payment with T/T, L/C
6. Approved by ISO9001, CE, SGS every year
7. Best service with 24 hours reply
We are here waiting for a cooperation chance between us, contact us today then you will get one more chance to find a loyal Hot Rolled Alloy Steel supplier!
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