31CrMoV9, 30CrMoV9, 1.7707, 1.8519 - nitriding steel
Structural boiler steel for nitriding 30CrMoV9, 1.7707, 31CrMoV9, 1.8519 according to DIN 17200, EN 10250-3, EN 10085.
| Standard | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | V: | Cu: | |
| PN | 33H3MF | |||||||||
| 0.29 - 0.36 | 0.5 - 0.8 | 0.17 - 0.37 | <0.035 | <0.035 | 2.4 - 2.8 | <0.3 | 0.35 - 0.45 | 0.2 - 0.3 | <0.3 | |
| PN | 30H2MF | |||||||||
| 0.26 - 0.34 | 0.4 - 0.7 | 0.15 - 0.40 | <0.035 | <0.035 | 2.3 - 2.7 | - | 0.15 - 0.25 | 0.1 - 0.2 | <0.3 | |
| EN | 31CrMoV9 - 1.8519 | |||||||||
| 0.27 - 0.34 | 0.4 - 0.7 | <0.40 | <0.025 | <0.035 | 2.3 - 2.7 | - | 0.15 - 0.25 | 0.1 - 0.2 | - | |
| EN | 30CrMoV9 - 1.7707 | |||||||||
| 0.26 - 0.34 | 0.4 - 0.7 | <0.40 | <0.035 | <0.035 | 2.3 - 2.7 | <0.6 | 0.15 - 0.25 | 0.1 - 0.2 | - | |
| GOST | 30Ch3MF - 30Х3МФ | |||||||||
| 0.27 - 0.34 | 0.3 - 0.6 | 0.17 - 0.37 | <0.035 | <0.035 | 2.3 - 2.7 | <0.3 | 0.2 - 0.3 | 0.06 - 0.12 | <0.3 | |
31CrMoV9, 30CrMoV9, 1.7707, 1.8519 - specifications and application
30H2MF steel is boiler grade, low-alloyed, used in the energy industry for the parts working in high temperatures below 540 °C. The material is often used in the manufacture of screws, nuts, parts of turbines and other equipment for the energy industry.
33H3MF is a steel designed for nitriding, which, unlike 38HMJ, does not have Aluminum in its chemical composition. The grade can be interchangeably used, however, does not exhibit the same hardness after thermo-chemical treatment, as 38HMJ does. Steel intended for piston pins, gears, bushings, camshafts, engine components, valve parts, cylinders, etc.
Steel is not suitable for welding.
Mechanical properties of 31CrMoV9, 1.8519 +QT steel
- Annealed softened delivery condition +A
- Hardness, HB: <248
- Heat-treated condition +QT
- Tensile strength, Rm: 850 - 1300 MPa
- The yield point, Re: > 650 MPa
- Elongation, A:> 9%
- Impact resistance, KV: > 25J
- Hardness of surface after nitriding, HV1: 800
Mechanical properties of 30CrMoV9, 1.7707 +QT steel
- Tensile strength, Rm: >800 MPa
- The yield point, Rp0,2: >590 MPa
- Elongation, A:> 8%
- Impact resistance, KV: > 20J
| Temperature (℃) | 200 | 300 | 400 | |
|---|---|---|---|---|
| The yield point Rp0.2 | >620 MPa | >540 MPa | >480 MPa | |
Mechanical properties of 33H3MF steel - 30mm section
- Tensile strength, Rm: >1080 MPa
- The yield point, Re: > 980 MPa
- Elongation, A:> 13%
- Contraction, Z: >57%
- Impact resistance, KCU2: 118 J/cm3
Mechanical properties forgings 30H2MF - dimensions <100mm
- Tensile strength, Rm: 1080 - 1270 MPa
- The yield point, Re: > 880 MPa
- Elongation, A:> 10%
- Impact resistance, KV: > 20J
| Temperature (℃) | 200 | 300 | 400 | |
|---|---|---|---|---|
| The yield point Rp0.2 | >706 MPa | >603 MPa | >539 MPa | |
In the above mentioned grades the company provides:
Substitutes, equivalents and other species designations
30 CrMoV 9
31 CrMoV 9
31CrMoV9
30CrMoV9
1.7707
1.8519
30Ch3MF
30H2MF
30Kh3MF
30Х3МФ
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