31CrMo12 | 1.8515 Material Datasheet

Material Test Series Values

Material Standard Values

Material Models for Simulation

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Material Description

Material Number	Material Number (single)	Standard	Range of Application	Standard Status	Country	Predecessor	Remark
1.8515 (DIN EN ISO 683-5 : 2021-08)	1.8515	DIN EN ISO 683-5 : 2021-08	Supersedes DIN EN 10085 : 2001-07	Valid	Germany	31CrMo12	The heat-treatable nitriding steel 31CrMo12 is applicated for heavy, wear-loaded machine components with a high surface hardness up to a dimension of 250 mm. For hot steam fitting components such as valve spindles application at dimensions up to 100 mm at maximum pressure for grinder and miller spindles. The steels contains nitriding agents (Cr) which contribute by the nitriding resp. nitrocarburization process with N resp. N and C to an increase of - case hardness - wear resistance - fatigue resistance and - corrosion resistance. Application for forged components: hardened, mechanically machined and thermochemical treated (e.g. nitriding)

Chemical Composition

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

Semi-finished Product	Condition	Nominal Size [mm]	Temperature [°C]	Tensile Strength [MPa]	Yield Strength [MPa]	Elongation A [%]	Hardness HB \| HBW	Hardness HV	Source	Remark
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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)]	Source
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Young's Modulus [GPa] vs Temperature [°C]

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Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] vs Temperature [°C]

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Differential Coefficient of Thermal Expansion [10^-6*K^-1] vs Temperature [°C]

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Toughness Data (Impact)

Condition	Nominal Size [mm]	Temperature [°C]	Specimen Shape	Specimen Direction	Notch Impact Energy [J]	Source
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Heat Treatment

Heat Treatment	Step	Temperature [°C]	Holding Time [h]	Medium	Source
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Cross Reference

Material Name	Country	Standard
31CrMo12	Germany	DIN 743-3
31CrMo12	Europe	EN ISO 683-5
31CrMo12	International	ISO 683-5

Producer/Supplier/Trade names

Tradename	Supplier	Source
GK 3	AUBERT & DUVAL Deutschland GmbH, München	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
BGH 8515	BGH Edelstahl Siegen GmbH	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
DIRO-31CrMo12	DIROSTAHL, Remscheid	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Aerodur 8515	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Nitrodur 8515	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach

Material Compliance

REACh	RoHS
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FKM Guideline Fatigue Strength

Condition	Nominal Size [mm]	Temperature [°C]	Number of Cycles	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]	Constant a for size factor Kd for yield stress Rp	Constant a for size factor Kd for tensile strength Rm	Source	Remark
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31CrMo12 (1.8515; DIN EN ISO 683-5 : 2021-08)

Linear-elastic

Temperature [°C]	Young's modulus [GPa]	Poisson's ratio
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Alternating stress

Temperature [°C]	Stress ratio	Alternating stress [MPa]	Cycles
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Yield strength

Temperature [°C]	Yield strength [MPa]
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Electrical resistivity

Temperature [°C]	Specific electrical resistance [µΩm]
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Coefficient thermal expansion

Related Temperature [°C]	Temperature [°C]	Coefficient thermal expansion [10^-6*K^-1]
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Specific heat

Temperature [°C]	Specific heat [kJ/(kg*K)]
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Density

Temperature [°C]	Density [g/cm³]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Thermal conductivity

Temperature [°C]	Thermal conductivity [W/(m*K)]
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Classification

WIAM Material	Source description
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Designation

Designation	Material number	Source
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31CrMo12 (quenched and tempered (+QT); sheet; 8.000-20.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); sheet; 20.000-60.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); sheet; 60.000-100.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); sheet; 100.000-160.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); drop forging; 16.000-40.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); drop forging; 40.000-100.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); drop forging; 100.000-160.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); drop forging; 160.000-250.000mm)

Yield strength

Temperature [°C]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31CrMo12 (quenched and tempered (+QT); 40.000mm)

Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Dimension [mm]	Source description
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31CrMo12 | 1.8515 Material Datasheet

Material Test Series Values

Material Standard Values

Material Models for Simulation

Material Description

Chemical Composition

Mechanical Properties

Physical Properties

Young's Modulus [GPa] vs Temperature [°C]

Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] vs Temperature [°C]

Differential Coefficient of Thermal Expansion [10^-6*K^-1] vs Temperature [°C]

Toughness Data (Impact)

Heat Treatment

Cross Reference

Producer/Supplier/Trade names

Material Compliance

FKM Guideline Fatigue Strength

31CrMo12 (1.8515; DIN EN ISO 683-5 : 2021-08)

Linear-elastic

Alternating stress

Yield strength

Electrical resistivity

Coefficient thermal expansion

Specific heat

Density

Tensile strength

Thermal conductivity

Classification

Designation

31CrMo12 (quenched and tempered (+QT); sheet; 8.000-20.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); sheet; 20.000-60.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); sheet; 60.000-100.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); sheet; 100.000-160.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); drop forging; 16.000-40.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); drop forging; 40.000-100.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); drop forging; 100.000-160.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); drop forging; 160.000-250.000mm)

Yield strength

Tensile strength

Classification

31CrMo12 (quenched and tempered (+QT); 40.000mm)

Tensile strength

Classification

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