35NiCr6
1.5815Nickel-chromium quenched and tempered steel with 1.2–1.6% Ni and 0.9–1.1% Cr for high strength and excellent impact toughness. Good hardenability for uniform properties in medium cross-sections. Used for heavy-duty engine parts, crankshafts, gears, shafts, piston rods, and bolts. Important grade in aerospace (AIR 9160/C as 35NC6) and heavy mechanical engineering.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 3140 | — | REF |
| 🇫🇷 | AFNOR | France | 35NC6 | — | 97% |
| 🇬🇧 | BS | United Kingdom | 640M40 / EN111 | — | 93% |
Sources: ASTM A29, NF EN 10083-3, BS 970
Mechanical properties — Pro
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
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| Hardness HB | ||
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S235J2W
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EN-GJS-500-7
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