30CrNiMo8, 1.6580
| Grade : | 30CrNiMo8 |
| Number: | 1.6580 |
| Classification: | Alloy special steel |
| Standard: | EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steels EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions |
| C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.26 - 0.34 | max 0.4 | 0.5 - 0.8 | 1.8 - 2.2 | max 0.025 | max 0.035 | 1.8 - 2.2 | 0.3 - 0.5 |
| EU EN | Germany DIN,WNr | Japan JIS | France AFNOR | England BS | China GB | Russia GOST | Inter ISO |
| 30CrNiMo8 | 30CrNiMo8 | SNCM431 | 30CND8 | 823M30 | 30Cr2Ni2Mo | 3KH3M3F | 31CrNiMo8 |
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%
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℃
