SSA7225 High Tensile Steel, AISI 4140,709, JIS SCM440, BS EN 19 DIN42CrMo4
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AISI 4140 is a 1% chromium-molybdenum steel with medium hardenability, offering high tensile strength. Improved machinability allows for increased feeds and speeds, extending tool life without compromising mechanical properties. Pre-hardened and tempered, it can be further surface hardened via flame or induction hardening, as well as nitriding. We import from Europe, Japan and China.
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| Trade Name | Technical Delivery Condition | Q&T Hardness | C (%) | Si (%) | Mn (%) | Cr (%) | Mo (%) |
|---|---|---|---|---|---|---|---|
| SSA7225 | Quenched & Tempered | 28 – 32 HRC | 0.38 – 0.45 | ≤ 0.40 | 0.60 – 0.90 | 0.90 1.20 | 0.15 – 0.30 |
| Werkstoff | DIN standard | AISI | BS | JIS | SIS | UNI |
|---|---|---|---|---|---|---|
| 1.7225 | 42CrMo4 | 4140 | EN19 | SCM440 | 2244 | 42CrMo4 |
Type of steel and characteristics:
Low alloy chromium, molybdenum heat treatable steels
Applications:
Components with large and medium cross sections, requiring with high tensile strength and toughness, automotive engineering and gear and engine construction, e.g. crankshafts, steering knuckles, shafts, connecting rods, spindles, intermediate gears, pump and gear shafts. It is also suitable for
barrels of small fire arms. Also possessed good surface hardenability.
Heat Treatment:
Hot Forging -1050 - 850°C
Normalizing - 840 - 880°C
Annealing - 680 - 720°C
Hardening - 830 - 860°C
Hardness obtainable - 50 – 56 HRC water quenched
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