30CrNiMo8, 1.6580, 30NCD8 - alloyed structural steel for heat treatment according to EN 10083-3, EN 10269.
| Standard | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | Cu: | ||
| EN | 30CrNiMo8 - 1.6580 | |||||||||
| 0.26 - 0.34 | 0.3 - 0.6 | <0.4 | <0.025 | <0.035 | 1.8 - 2.2 | 1.8 - 2.2 | 0.3 - 0.5 | - | ||
| PN | 30H2N2M | |||||||||
| 0.26 - 0.34 | 0.3 - 0.6 | 0.17 - 0.37 | <0.035 | <0.035 | 1.8 - 2.1 | 1.8 - 2.1 | 0.25 - 0.35 | <0.2 | ||
| NF | 30CND8 / 30NCD8 | |||||||||
| 0.26 - 0.33 | 0.3 - 0.6 | 0.1 - 0.4 | <0.030 | <0.025 | 1.8 - 2.2 | 1.8 - 2.2 | 0.3 - 0.5 | - | ||
| ISO | 31CrNiMo8 | |||||||||
| 0.27 - 0.34 | 0.3 - 0.6 | 0.1 - 0.4 | <0.035 | <0.035 | 1.8 - 2.2 | 1.8 - 2.2 | 0.3 - 0.5 | - | ||
30CrNiMo8, 1.6580 - specification and application
Alloyed structural steel with medium hardenability designed for heavy duty components, characterized by high elasticity and strength properties reaching over 1560 N/mm2 at small diameters. When softened, the hardness reaches max. 248 HRB. It is also characterized by its resistance to variable loads and impacts. The material is not suitable for welding and ultimately requires additional preheating. Grade 30CrNiMo8 is used for production of heavily loaded parts, shafts and drive axes, steering shafts, crankshafts of engines, screws and elements exposed to temperatures in the power industry.
Mechanical properties of 30CrNiMo8, 1.6580
- Dimensions <16mm
- Tensile strength, Rm 1250 - 1450 N/mm2
- Yield strength, Re: >1050 N/mm2
- Elongation, A: >9%
- Necking, Z: >40%
- Dimensions 16-40mm
- Tensile strength, Rm 1250 - 1450 N/mm2
- Yield strength, Re: >1050 N/mm2
- Elongation, A: >9%
- Necking, Z: >40%
- Dimensions 40-100mm
- Tensile strength, Rm 1100 - 1300 N/mm2
- Yield strength, Re: >900 N/mm2
- Elongation, A: >10%
- Necking, Z: >45%
- Impact strength, KV: >35 J
- Dimensions 100-160mm
- Tensile strength, Rm 1000 - 1200 N/mm2
- Yield strength, Re: >800 N/mm2
- Elongation, A: >11%
- Necking, Z: >50%
- Impact strength, KV: >45J
- Dimensions 160-330mm:
- Tensile strength, Rm >850 N/mm2
- Yield strength, Re: >630 N/mm2
- Elongation, A: >12%
- Impact strength, KV: >45 J
- Dimensions >330mm
- Tensile strength, Rm >800 N/mm2
- Yield strength, Re: >590 N/mm2
- Elongation, A: >12%
- Impact strength, KV: >40 J
Heat treatment of 30CrNiMo8, 1.6580 steel
- Softening annealing at a temperature of 640 - 680℃
- Normalizing annealing at a temperature of 840 - 860℃
- Hardening with cooling in oil at 815 - 845℃
- Tempering with cooling in air at 550 - 650℃
In the above mentioned grades the company delivers:
- Drawn and hot-rolled bars, flat bars 30CrNiMo8, 1.6580
- Forgings and forged bars in grade 30CrNiMo8, 1.6580
Other substitutes and equivalents according to foreign standards:
30ChN2MA, 30HN2MA, 30ХН2МА, 30NCD8, 30CND8, 31CrNiMo8, NCMo6 Z, 31CrNiMo8H, 31CrNiMo8HH, 31CrNiMo8HL, SNCM431, 30MoCrNi20, C5432.