SAE4140 / 1.7225 / SCM440 / 42CrMo Alloy Steel Round Bar with Ultra-high Strength
SAE4140 / 1.7225 / SCM440 /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.
1. Equivalent grades
| GB (China) | DIN (German) | AISI (USA) | JIS (Japan) |
| 42CrMo | 1.7225 | SAE4140 | SCM440 |
2. Chemical Composition (%)
| C | Si | Mn | Cr | Mo | P | S | Ni |
| 0.38~0.45 | 0.17~0.37 | 0.60~0.90 | 0.90~1.20 | 0.15-0.25 | ≤0.018 | ≤0.030 | ≤0.012 |
3. Mechanical Properties
1) Tensile strength:σb (MPa): ≥1080(110);
2) Yield strength:σs (MPa): ≥930(95);
3) Elongation:δ5 (%): ≥12;
4) Section shrinkage:ψ (%): ≥45;
5) Impact work:Akv (J): ≥63;
6) Impact toughness value:αkv (J/cm²):≥78(8).
4. Recommend heat treatment
| Quenching | Tempering | |
| Heating temperature/ºC | Cooling way | Hardness (HRC) | Tempering temperature/ºC | Cooling way | Hardness
(HRC) |
| 850-880 |
| Oil Cooling | 50-52 | 450-650 | Air | 25-40 |
5. Application
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip,oil drill pipe joints and fishing tools,etc.
6. Feature
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.
7. About SAE4140 / 1.7225 / SCM440 / 42CrMo
8. Ready Stock:
Round Bar diameter 14-460mm.
All the sizes as require can be customerized as fresh production with MOQ.
9. Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
Annealing: HBS<=235.
10. Delivery time:
1) For abundant stock, 15-20 days.
2) For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.
11. Our service:
1) sizes, materials and others are all at your requirements and can be changed;
2) Price varies on materials, dimensions, finish craft and different payments;
3) We are direct manufacture in machinery manufacturing work with experience of several decades;
4) Detail production design will be made according to information you offered;
5) We have adequate inventory, so that we can quick delivery;
6) The most important is that we have advanced equipment.
Listed specifications are only typical grades; products of required specifications can be developed/produced per international, Chinese or industry standards, or based on agreements with customers.
12. About warehouse:
Q: Are you a manufacturer or merely a trader?
A: We are trading company act as exporting Steel Products with our own factory,
we can manufacture the products as in cutomer's requirement,wholesale and retail all kinds of domestic mould steel,the price we offered is very competitive compared with other agents.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as SGS, CE,ISO if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival. Third,the products we export are mainly from ShaGang group, WenFeng group, XingCheng group, DongTe group,DaYe and so on, the quality are certained.
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material don't have stock, the delivery lead time is about 30-50 days after receiving your prepayment or firm order.
Q: What is the payment term?
A:100% T/T or 30%T/T deposite prepaid, 70%Balance L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.
14. Corner of our factory:
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SAE4140 / SCM440 / 42CrMo Alloy Steel Round Bar With Ultra - High Strength Images
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