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30CrNiMo8 | 1.6580 Material Datasheet

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Material Description

Material Number Material Number (single) Standard Scope Standard Status Country VDA 231-106 classification
1.6580 (SEW 550 : 2024-12) 1.6580 SEW 550 : 2024-12 Supersedes SEW 550 : 1976-08 Valid Germany 1.1 1)
1) Remark: Quenched and tempered steel for larger forgings.

Chemical Composition

C [%] Cr [%] Mn [%] Mo [%] Ni [%] P [%] S [%] Si [%]
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Mechanical Properties

Semi-finished Product Condition Nominal Size [mm] Temperature [°C] Specimen Direction Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Elongation A [%]
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Physical Properties

Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Differential Coefficient of Thermal Expansion [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Thermal Diffusivity [10^-6 m²/s] Specific Electrical Resistance [µΩm] Mean Specific Heat Capacity [kJ/(kg*K)] True Specific Heat Capacity [kJ/(kg*K)]
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Toughness Data (Impact)

Semi-finished Product Condition Nominal Size [mm] Temperature [°C] Specimen Shape Specimen Direction Notch Impact Energy [J]
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Cross Reference

Material Name Country Standard
30CrNiMo8 Europe EN 10250-3
SNCM431 Japan JIS G 4053 1)
SNCM431 South Korea KS D 3867 1)
A29 Grade 4340 USA ASTM A29 2)
A434 Grade 4340 USA ASTM A434 2)
Grade 4340 USA SAE 2)
G43400 USA UNS 2)
30 NiCrMo 8 Germany 3)
1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
2) Source: SAE HS-1086, ASTM DS56M, Metals & Alloys in the Unified Numbering System, 14th Edition, SAE International, 2023
3) Source: Stahlschlüssel 1980, Verlag Stahlschlüssel Wegst GmbH, Marbach

Producer/Supplier/Trade names

Tradename Supplier
836 J Aubert&Duval Special Steel GmbH, Mönchengladbach 1)
BGH 6580 BGH Edelstahl Siegen GmbH 1)
Firmodur 6580 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten 1)
30CrNiMo8 Schmiedewerke Gröditz GmbH, Gröditz 1)
BÖHLER V145 voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf 1)
V145 voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf 1)
1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach

FKM Guideline Fatigue Strength

Condition Temperature [°C] Tensile Strength [MPa] Yield Strength [MPa] Fatigue Limit under rev. Tension-Compression Stresses [MPa] Fatigue Strength under pulsating Tensile Stresses [MPa] Bending Fatigue Strength [MPa] Shear Fatigue Strength [MPa] Torsion Fatigue Strength [MPa]
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Fracture Toughness

Temperature [°C] Plane-Strain Fracture Toughness KIc [MPa*m^½]
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