31 CrMo 12 | 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	Successor	Remark
1.8515 (DIN 17211 : 1987-04)	1.8515	DIN 17211 : 1987-04	DIN 17211 : 1987-04 replaced by DIN EN 10085 : 2001-07	Replaced	Germany	31CrMo12	The nitriding steel 31 CrMo 12 can undergo quenchhardening and is used for heavy machine parts that are subjected to wear, have a high surface hardness and have a dimension of up to 250 mm. With parts for hot steam fittings such as valve spindles, it is used for dimensions of up to 100 mm and under highest pressure, the same with grinder valves and milling machine spindles. The steel contains a nitride agent (Cr) which contributes through the nitriding process or the nitro-carburization process with N or N and C to a higher: - case hardness - abrasion resistance - fatigue strength and - corrosion resistance. It is used for forged construction components: quench-hardened, mechanically processed and treated thermo-chemically (for example 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]	Specimen Direction	Tensile Strength [MPa]	Yield Strength [MPa]	Elongation A [%]	Hardness HB \| HBW	Case 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]	Medium	Source	Remark
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Cross Reference

Material Name	Country	Standard
31 CrMo 12	Belgium	NBN 253-04
30 CD 12	France	NF A 35-552
722 M 24	Great Britain	BS 970/1
31 CrMo 12	International	ISO 683/10-85
31 CrMo 12	Italy	UNI 8552
2240	Sweden	MNC 855 E
F.1712-31 CrMo 12	Spain	UNE 36-014
31CrMo12	Germany	DIN EN 10085

Producer/Supplier/Trade names

Tradename	Supplier
1.8515	H. Kleineberg GmbH, Stelle
31CrMo12	Hoesch Hohenlimburg GmbH, Hagen
31CrMo12	ThyssenKrupp Steel Europe AG, Duisburg
31CrMo12	Swiss Steel International GmbH, Düsseldorf
31CrMo12	Hermann Stahlschmidt Stahlgesellschaft m. b. H., Willich
31CrMo12	Haage Anagramm Technologien GmbH, Mülheim a. d. Ruhr
31CrMo12	C.D. Wälzholz GmbH & Co. KG, Hagen
31CrMo12	HEINE + BEISSWENGER Stiftung + Co.KG, Fellbach
31CrMo12	Tata Steel, IJmuiden
31CrMo12	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten
31CrMo12	Sidenor Deutschland, Düsseldorf
31CrMo12	ASCOMETAL GmbH, Erkrath
Almenit 8515	Almenit, Mittelberg
BGH 8515	BGH Edelstahl Siegen GmbH
BÖHLER V304	voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg
Buderus 31CrMo12	Buderus Edelstahl GmbH, Wetzlar
DIRO-31CrMo12	DIROSTAHL, Remscheid
EWK 31CrMo12	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten
G.K 3	AUBERT & DUVAL Deutschland GmbH, München
Klöckner 31CrMo12	Klöckner & Co SE, Duisburg

Material Compliance

REACh	RoHS
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FKM Guideline Fatigue Strength

Semi-finished Product	Condition	Nominal Size [mm]	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]	Source	Remark
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31 CrMo 12 (1.8515; DIN 17211 : 1987-04)

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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31 CrMo 12 (quenched and tempered (+QT); bar; 0.000-100.000mm)

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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31 CrMo 12 (quenched and tempered (+QT); bar; 100.000-250.000mm)

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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31 CrMo 12 (quenched and tempered (+QT); hammer forging; 0.000-100.000mm)

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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31 CrMo 12 (quenched and tempered (+QT); hammer forging; 100.000-250.000mm)

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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31 CrMo 12 (quenched and tempered (+QT); bar; 100.000mm)

Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

Treatment	Semi-finished product	Dimension [mm]	Source description
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31 CrMo 12 | 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

31 CrMo 12 (1.8515; DIN 17211 : 1987-04)

Linear-elastic

Alternating stress

Yield strength

Electrical resistivity

Coefficient thermal expansion

Specific heat

Density

Tensile strength

Thermal conductivity

Classification

Designation

31 CrMo 12 (quenched and tempered (+QT); bar; 0.000-100.000mm)

Yield strength

Tensile strength

Classification

31 CrMo 12 (quenched and tempered (+QT); bar; 100.000-250.000mm)

Yield strength

Tensile strength

Classification

31 CrMo 12 (quenched and tempered (+QT); hammer forging; 0.000-100.000mm)

Yield strength

Tensile strength

Classification

31 CrMo 12 (quenched and tempered (+QT); hammer forging; 100.000-250.000mm)

Yield strength

Tensile strength

Classification

31 CrMo 12 (quenched and tempered (+QT); bar; 100.000mm)

Tensile strength

Classification

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