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
Compatibility verdict
35NiCr6 and 35NC6: 97% composition match
Related materials
40CrMoV4-6
1.7711Chromium-molybdenum-vanadium creep-resisting steel for high-temperature fasteners and bolts per EN 10269. Excellent creep resistance up to 540°C with tensile strength 850–1000 MPa after quenching and tempering. Widely used for steam turbine bolts, pressure vessel fasteners, and power generation components. Equivalent to ASTM A193 Grade B16.
33CrMoV12-9
1.8522Premium nitriding steel with high chromium content (2.8–3.3%) providing exceptional surface hardness after gas or plasma nitriding (up to 900 HV). Excellent core strength (900–1100 MPa tensile) with good toughness. Used for gears, crankshafts, cylinders, spindles, and precision machine components in aerospace, automotive, and power generation. Also known as 32CDV13 (AFNOR) and AMS 6481.
14NiCrMo13-4
1.6657High-nickel case-hardening steel for heavily loaded large gears, shafts, and drivetrain components. Excellent core toughness with case hardness up to 62 HRC after carburizing. The high nickel content (3.0–3.5%) provides superior impact resistance even at low temperatures. Standard material for wind turbine gearboxes, heavy-duty industrial gears, and aerospace transmissions. Also known as EN36C (BS) and similar to SAE 9310.
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