34CrMo4 | 1.7220 Material Datasheet

Material Test Series Values

Material Standard Values

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Material Description

Material Number	Material Number (single)	Standard	Range of Application	Standard Status	Country	Remark
1.7220 (SEW 550 : 2024-12)	1.7220	SEW 550 : 2024-12	Supersedes SEW 550 : 1976-08	Valid	Germany	Quenched and tempered steel for larger forgings.

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 (0.2% offset) [MPa]	Elongation A [%]	Source
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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)

Semi-finished Product	Condition	Nominal Size [mm]	Temperature [°C]	Specimen Shape	Specimen Direction	Notch Impact Energy [J]	Source
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Cross Reference

Material Name	Country	Standard	Source
35CrMo	China	GB/T 3077	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
A30352	China	GB/T 3077	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	Europe	EN 10250-3
SCM432	Japan	JIS G 4053	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
SCM435	Japan	JIS G 4053	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
SCM432	South Korea	KS D 3867	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
SCM435	South Korea	KS D 3867	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
A291 Grade 4135	USA	ASTM A29	SAE HS-1086, ASTM DS56M, Metals & Alloys in the Unified Numbering System, 14th Edition, SAE International, 2023
A434 Grade 4135	USA	ASTM A434	SAE HS-1086, ASTM DS56M, Metals & Alloys in the Unified Numbering System, 14th Edition, SAE International, 2023
Grade 4135	USA	SAE	SAE HS-1086, ASTM DS56M, Metals & Alloys in the Unified Numbering System, 14th Edition, SAE International, 2023
G41350	USA	UNS	SAE HS-1086, ASTM DS56M, Metals & Alloys in the Unified Numbering System, 14th Edition, SAE International, 2023

Producer/Supplier/Trade names

Tradename	Supplier	Source
F 65	Aubert&Duval Special Steel GmbH, Mönchengladbach	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	Fritz Baumann GmbH & Co. KG, Güglingen	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
BGH 7220	BGH Edelstahl Siegen GmbH	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	Buderus Edelstahl GmbH, Wetzlar	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Aerodur 7220	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
Firmodur 7220	Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	DIROSTAHL, Remscheid	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
DE 7220	Dörrenberg Edelstahl GmbH, Engelskirchen	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	Edelstahlwerk C. & F. vom Brocke e.K., Altena-Altroggenrahmede	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220.00	Edelstahlwerk W. Ossenberg & Cie. GmbH, Altena	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	Hammerwerk Erft, G. Diederichs GmbH & Co. KG, Bad Münstereifel-Arloff	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	Hermann Stahlschmidt Stahlgesellschaft m. b. H., Willich	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	Chr. Höver & Sohn GmbH & Co KG, Lindlar	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	INTERSTAHL Service GmbH, Wetter	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	IMBACH & CIE AG, Nebikon	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	Rosswag GmbH, Pfinztal-Kleinsteinbach	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	Platestahl Umformtechnik GmbH, Lüdenscheid	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
34CrMo4	Schmiedewerke Gröditz GmbH, Gröditz	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
BÖHLER V330	voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
V330	voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach
1.7220	von Schaewen AG, Essen	Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach

FKM Guideline Fatigue Strength

Condition	Temperature [°C]	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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Fracture Toughness

Temperature [°C]	Yield Strength [MPa]	Plane-Strain Fracture Toughness KIc [MPa*m^½]	Source
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34CrMo4 | 1.7220 Material Datasheet

Material Test Series Values

Material Standard Values

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)

Cross Reference

Producer/Supplier/Trade names

FKM Guideline Fatigue Strength

Fracture Toughness

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