40CrMoV4-6, 1.7711 - boiler steel
40CrMoV4-6, 1.7711 - Structural boiler steel for operation at elevated temperatures according to EN 10269.
| Standard | Steel Grade | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | |||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | V: | Al: | |
| EN | 40CrMoV4-6 - 1.7711 | ||||||||
| 0.36 - 0.44 | 0.45 - 0.55 | <0.4 | <0.025 | <0.030 | 0.9 - 1.2 | 0.50 - 0.65 | 0.25 - 0.35 | <0.015 | |
| ASTM | SA193 / A193 gr. B16 - SA194 / A194 gr. 16 | ||||||||
| 0.36 - 0.47 | 0.45 - 0.70 | 0.15 - 0.35 | <0.035 | <0.040 | 0.80 - 1.15 | 0.50 - 0.65 | 0.25 - 0.35 | <0.015 | |
| UNS | UNS K14072 | ||||||||
| 0.36 - 0.44 | 0.45 - 0.70 | 0.15 - 0.35 | <0.040 | <0.040 | 0.80 - 1.15 | 0.50 - 0.65 | 0.25 - 0.35 | <0.015 | |
| IS | 40CrMoVH | ||||||||
| 0.36 - 0.44 | 0.45 - 0.85 | 0.10 - 0.35 | <0.030 | <0.030 | 0.90 - 1.20 | 0.55 - 0.75 | 0.25 - 0.35 | - | |
40CrMoV4-6, 1.7711 - specification and application
High-temperature structural steel for bolts, nuts, motor and machine components such as crankshafts, axles, spindles and gears.
Mechanical properties of 40CrMoV4-6, 1.7711 +QT:
- Tensile strength, Rm 850-1000 MPa
- Yield strength, Rp0,2: >640 MPa
- Elongation, A: >14%
- Necking, Z: >45%
- Impact strength, KV: > 25J
- Hardness: 250-300 HB
Mechanical properties at elevated temperatures
| Temperatures (℃) | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yield strength, Rp0,2 (MPa) | >630 | >610 | >590 | >575 | >550 | >540 | >525 | >507 | >480 | >430 | >365 | >268 |
Heat treatment of 40CrMoV4-6, 1.7711 steel:
- Annealing at a temperature of 680 - 730C
- Normalization at a temperature of 880 - 900C
- Annealing at a temperature of 830C
- Annealing at a temperature of 900 - 930C
- Normalization at a temperature of 650 - 720C
- Stress relief annealing after hardening at a temperature of 200C
- Stress relief annealing at a temperature 50C lower than tempering
In the above mentioned grades the company delivers:
Substitutes, equivalents and other species designations
40CrMoV4-6
40CrMoV4-7
1.7711
A193 grade B16
A194 grade 16
BS670-860
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