1.7711 40CrMoV4-6 Alloyed Carbon Steel
1.7711 40CrMoV4-6 DIN Alloyed Carbon Steel
1 1.7711 Introduction:
EN 1.7711 steel is an alloy steel formulated for primary forming into wrought products. 1.7711 is the EN numeric designation for this material. 40CrMoV4-6 is the EN chemical designation. It has a very low thermal conductivity among EN wrought alloy steels.
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2 1.7711 Application:
Staticaly and dymamicaly stressed components for vehicles, engines and machines, for parts of lager cross sections, gears, crankshafts. Hardness as surface hardened is more than 54 HRC.
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3 Quality Standard:
EN10269 Steels and Nickel Alloys for Fasteners with Specified Elevated and or Low Temperature Properties
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3 All Grades Comparison:
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4 1.7711 Chemical Composition(%):
| C | Mn | Si | P | S | Cr | Mo | V |
|---|---|---|---|---|---|---|---|
| 0.36-0.44 | 0.45-0.85 | 0.40 max | 0.030 max | 0.030 max | 0.90-1.20 | 0.50-0.65 | 0.25-0.35 |
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5 Typical Mechanical Properties (Quenched and Tempered):
| Dia Scope (mm) | Tensile Strength Rm (Mpa) | Yield Strength R2 (Mpa) | Elongation (longitudinal direction) Al (%) | Area Reduction Z (%) | Impact Energy Joules (20°C) (KCV J) |
|---|---|---|---|---|---|
| 100mm max | 850-1000 | 700 min | 14 min | 45 min | 30 min |
| 100mm-160mm | 850-1000 | 640 min | 14 min | 45 min | 25 min |
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6 HEAT TREATMENT:
- Forging:Hot forming temperature: 1100-850oC.
- Soft annealing:Heat to 650-730oC, cool slowly. This will produce a maximum Brinell hardness of 241.
- Hardening:Harden from a temperature of 880-930oC followed by oil or water (conditional) quenching.
- Tempering:empering temperature: 670-730oC.
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7 Mill′s test certificate:
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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