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41CrAlMo7-10 | 1.8509 Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country Predecessor VDA 231-106 classification
1.8509 (DIN EN ISO 683-5 : 2021-08) 41CrAlMo7-10 1.8509 DIN EN ISO 683-5 : 2021-08 Supersedes DIN EN 10085 : 2001-07 Valid Germany 41CrAlMo7-10 1.1.1 1)
1) Remark: The heat-treatable nitriding steel 41CrAlMo7-10 is applicated for hot steam fitting components of high fatigue limit. For application under highest surface loadings: dimension up to 100 mm

Chemical Composition

Al [%] C [%] Cr [%] Mn [%] Mo [%] P [%] S [%] Si [%] Remainder
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Material Compliance

REACh RoHS
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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
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Toughness Data (Impact)

Condition Nominal Size [mm] Temperature [°C] Specimen Shape Specimen Direction Notch Impact Energy [J]
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FKM Guideline Fatigue Strength

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] Constant a for size factor Kd for yield stress Rp Constant a for size factor Kd for tensile strength Rm
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Heat Treatment

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

Material Name Country Standard
38CrMoAl China GB/T 3077 1)
A33382 China GB/T 3077 2)
38CrMoAl China GB/T 11251 2)
A33382 China GB/T 11251 2)
38CrMoAlA China YB/T 4373 2)
A33383 China YB/T 4373 2)
38CrMoAlA China YB/T 5301 2)
A33383 China YB/T 5301 2)
41CrAlMo7-10 Europe EN ISO 683-5
41CrAlMo7-10 International ISO 683-5
41CrAlMo7-4 International 2)
SACM645 Japan JIS G 4053 1)
SACM645 South Korea KS D 3756 2)
38Ch2MJuA Russia GOST 4543 2)
38Х2MЮA Russia ГОСТ 4543 2)
A355 Class A USA ASTM A355 3)
Class A USA ASTM A355 3)
Nit.135 USA 3)
Nitriding steel 135 USA 3)
135 USA 3)
K24065 USA UNS 3)
41CrAlMo7 2)
1) Source: EN ISO 683-5:2021-05, Annex C
2) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
3) Source: Metals & Alloys in the Unified Numbering System, SAE/ASTM, 11th Edition, 2008

Producer/Supplier/Trade names

Tradename Supplier
LK 3 AUBERT & DUVAL Deutschland GmbH, München 1)
BGH 8509 BGH Edelstahl Siegen GmbH 1)
Aerodur 8509 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten 1)
Nitrodur 8509 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten 1)
DE 8509 Dörrenberg Edelstahl GmbH, Engelskirchen 1)
Edel 1.8509 ET Edelstahl-Trading GmbH, Willich 1)
BÖHLER V800 voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg 1)
V800 voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg 1)
1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach