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24CrMo5 | 1.7258 Material Datasheet

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Material Description

Material Number Material Number (single) Standard Scope Standard Status Country Predecessor VDA 231-106 classification
1.7258 (SEW 550 : 2024-12) 1.7258 SEW 550 : 2024-12 Supersedes SEW 550 : 1976-08 Valid Germany 24 CrMo 5 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
24 CrMo 5 Germany SEW 550

Producer/Supplier/Trade names

Tradename Supplier
F 66 S AUBERT & DUVAL Deutschland GmbH, München 1)
BGH 7258 BGH Edelstahl Siegen GmbH 1)
Carbodur 7258 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten 1)
24CrMo5 Hammerwerk Erft, G. Diederichs GmbH & Co. KG, Bad Münstereifel-Arloff 1)
24CrMo5 Rosswag GmbH, Pfinztal-Kleinsteinbach 1)
24CrMo5 Saarstahl AG, Völklingen 1)
24CrMo5 Schmiedewerke Gröditz GmbH, Gröditz 1)
BÖHLER V340 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 (0.2% offset) [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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