34CrAlNi7-10 | 1.8550 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
1.8550 (DIN EN ISO 683-5 : 2021-08)	1.8550	DIN EN ISO 683-5 : 2021-08	Supersedes DIN EN 10085 : 2001-07	Valid	Germany	34CrAlNi7-10	The heat-treatable nitriding steel 34CrAlNi7-10 is applicated for machine engineering components, piston rods, plungers and spindles of particularly high dimensions. The steels contains nitriding agents (Cr and Al) 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) The steel with a higher Al-content shows a tendency to increased skin decarburization. The forged part requires sufficient machining allowances so that the finished component can be supplied to the nitriding process decarburization-free.

Chemical Composition

Al [%]	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	Source
34CrAlNi7	Germany	DIN 743-3
34CrAlNi7-10	Europe	EN ISO 683-5
34CrAlNi7-10	International	ISO 683-5
A355 Class C	USA	ASTM A355	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Class C	USA	ASTM A355	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
K52440	USA	UNS	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrAlNi7			Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach

Producer/Supplier/Trade names

Tradename	Supplier	Source
PK 3	AUBERT & DUVAL Deutschland GmbH, München	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
CR AN7	Aubert&Duval Special Steel GmbH, Mönchengladbach	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
BGH 8550	BGH Edelstahl Siegen GmbH	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Nitrodur 8550	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Ni 50	Dörrenberg Edelstahl GmbH, Engelskirchen	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
BÖHLER V820	voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
V820	voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Ni 8550	W.S.M. Werkzeugstahl Handelsgesellschaft mbH & Co. KG, Meinerzhagen	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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34CrAlNi7-10 (1.8550; 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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 (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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34CrAlNi7-10 | 1.8550 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

34CrAlNi7-10 (1.8550; 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

34CrAlNi7-10 (quenched and tempered (+QT); sheet; 8.000-20.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); sheet; 20.000-60.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); sheet; 60.000-100.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); sheet; 100.000-160.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); drop forging; 16.000-40.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); drop forging; 40.000-100.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); drop forging; 100.000-160.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); drop forging; 160.000-250.000mm)

Yield strength

Tensile strength

Classification

34CrAlNi7-10 (quenched and tempered (+QT); 40.000mm)

Tensile strength

Classification

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