30CrNiMo8 This material is very difficult to process. 30CrNiMo8 to do HRB80 below are very difficult, generally do HRB85 (about HB160-240) can be done.
Widely used, in addition to high pressure and frequent fluctuations of high pressure chemical containers, but also used in pressure pipes, plastic molds, important structures, etc. For example, FD70A, FD77A wind turbine spindle using high quality alloy steel (30CrNiMo8) forging manufacturing.
The description of the application of the material in the German standard books that have been contacted is: the largest part loaded, large quality diameter. Used for the most loaded parts in automobiles and machine tools; Large drive shaft, turbine rotor, gear.
30CrNiMo8 is more expensive. Our steel mills also produce 30CrNiMo8 according to German DIN standard 30CrNiMo8.
DIN 30CrNiMo8 steel is an alloy steel formulated for primary forming into wrought products.
1. Supply Range of DIN 30CrNiMo8 Grade Steel
30CrNiMo8 Round Bar: diameter 20~130mm
Condition: hot rolled; normalized; Q+T
2. Relevant Specification for 30CrNiMo8 Material
| EN 10083-3 | BS970 |
| 30CrNiMo8 / 1.6580 | 823M30 |
3. DIN 30CrNiMo8 Chemical Composition
| GRADE | CHEMICAL COMPOSITION | |||||||
| C | Si | Mn | P | S | Cr | Mo | Ni | |
| max | max | max | ||||||
| 30CrNiMo8 / 1.6580 | 0,26 ~ 0,34 | 0,40 | 0,50 ~ 0,80 | 0,025 | 0,035 | 1,80 ~ 2,20 | 0,30 ~ 0,50 | 1,80 ~ 2,20 |
4. 30CrNiMo8 Properties
Properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.82
5. Forging of DIN 30CrNiMo8 Alloy Steel
Hot forming temperature: 1050-850oC.
Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 248.
Normalizing
Temperature: 850-880oC.
Hardening
Harden from a temperature of 830-880oC followed by oil quenching.
Tempering
Tempering temperature: 540-680oC.
7. Applications of 30CrNiMo8 Round Bar
For permanently stressed components with large cross sections for automotive and mechanical engineering. For economic performance under severe dynamic stress, parts must be designed for optimum strength or toughness.
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