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X12CrNiMo12 | 1.4939 Material Datasheet

Material Standard Values

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Material Description

Material Number	Material Name	Material Number (single)	Standard	Standard Status	Country	VDA 231-106 classification	Application temperature [°C]
1.4939 (WL 1.4939 : 1981-03)	X12CrNiMo12	1.4939	WL 1.4939 : 1981-03	Valid	Germany	1.1.2	≤ 550	1)
1) Remark: The stainless tempered chromium-nickel-molybdenum aerospace steel is used for compressor parts of engines, discs, blades, bolts and casing parts up to 550 °C. It is weldable and corrosion resistant under normal atmospheric conditions in the polished or precision ground condition.

Chemical Composition

C [%]	Cr [%]	Mn [%]	Mo [%]	N [%]	Ni [%]	P [%]	S [%]	Si [%]	Ti [%]	V [%]	Remainder
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Material Compliance

REACh	RoHS
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Mechanical Properties

Semi-finished Product	Condition	Condition Number	Nominal Size [mm]	Temperature [°C]	Specimen Direction	Tensile Strength [MPa]	Yield Strength (0.2% offset) [MPa]	Elongation A [%]	Elongation A50 [%]	Reduction of Area [%]	Hardness HB \| HBW	Hardness HV
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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]	Thermal Conductivity [W/(m*K)]	Mean Specific Heat Capacity [kJ/(kg*K)]	Electric Conductivity [MS/m]	Magnetizeability
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Toughness Data (Impact)

Semi-finished Product	Condition	Condition Number	Temperature [°C]	Specimen Shape	Specimen Direction	Notch Impact Energy [J]
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Welding and Joining

Procedure	Welding and Joining - Evaluation	Preheating [°C]	Working Temperature [°C]
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Creep Rupture Behaviour

Condition	Condition Number	Temperature [°C]	Creep Tensile Strength at 10² h [MPa]	Creep Tensile Strength at 3*10² h [MPa]	Creep Tensile Strength at 10³ h [MPa]	Creep Tensile Strength at 10^4 h [MPa]	Creep Tensile Strength at 10^5 h [MPa]	0.1% Creep Limit at 10² h [MPa]	0.1% Creep Limit at 3*10² h [MPa]	0.1% Creep Limit at 10³ h [MPa]	0.2% Creep Limit at 10^4 h [MPa]	0.2% Creep Limit at 10^5 h [MPa]
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Heat Treatment

Heat Treatment	Step	Temperature [°C]	Holding Time [h]	Medium
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Formability - Bending - Folding

Semi-finished Product	Condition	Condition Number	Nominal Size [mm]	Specimen Direction	Bend Factor (180°)
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Cross Reference

Material Name	Country	Standard
1.4939.2	Germany	WL 1.4939-1
1.4939.5	Germany	WL 1.4939-1
1.4939.6	Germany	WL 1.4939-2
FE-PM37	Europe	EN 2280	1)
FE-PM37	Europe	EN 2278	2)
FE-PM37	Europe	EN 2279	2)
Z 12 CNDV 12	France	AIR 9160	1)
AMS 5719	USA	AMS 5719	1)
S64152	USA	UNS	3)
S538	Great Britain	BS S 538	1)
S151	Great Britain	BS S 151	1)
X12CrNiMoVN12			4)
C50TF68	USA	GE Aviation	5)
DMD0242-20	France	Safran Aircraft Engines	5)
1) Source: WL 1.4939-1 : 1981-03
2) Source: WL 1.4939-2 : 1981-03
3) Source: Metals & Alloys in the Unified Numbering System, SAE/ASTM, 11th Edition, 2008
4) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
5) Source: Aerospace Materials, voestalpine BÖHLER Aerospace GmbH & Co KG, Kapfenberg/Austria, 2022

Producer/Supplier/Trade names

Tradename	Supplier
Jethete M152	Aircraftmaterialsuk.com Ltd, Stokenchurch
ATI Jethete M152	AUBERT & DUVAL Deutschland GmbH, München	1)
X 13 VDW	AUBERT & DUVAL Deutschland GmbH, München	1)
BGH 4939	BGH Edelstahl Siegen GmbH	1)
Aerodur 4939	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten	1)
Jethete	Enpar Sonderwerkstoffe GmbH, Gummersbach	1)
X12CrNiMo12	Schmiedewerke Gröditz GmbH, Gröditz	1)
4939	Schmidt + Clemens GmbH + Co. KG, Edelstahlwerk Kaiserau, Lindlar	1)
BÖHLER T552 (LW)	voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg	1)
T552 (LW)	voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf	1)
1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach