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34 CrAlNi 7 | 1.8550 Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country Successor VDA 231-106 classification
1.8550 (DIN 17211 : 1987-04) 34 CrAlNi 7 1.8550 DIN 17211 : 1987-04 DIN 17211 : 1987-04 replaced by DIN EN 10085 : 2001-07 Replaced Germany 34CrAlNi7-10 1.1.1 1)
1) Remark: The nitriding steel 34 CrAlNi 7 can undergo quenchhardening and is used for heavy machine parts, piston rods, plunger pistons, spindles with particularly large dimensions. The steel contains a nitride agent (Cr and Al) 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). The steel with an increased Al-content is susceptible to increased case decarbonization. The forging requires sufficient additives for processing so that the finished construction component can undergo the nitriding process without decarburization.

Chemical Composition

Al [%] C [%] Cr [%] Mn [%] Mo [%] Ni [%] 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] Specimen Direction Tensile Strength [MPa] Yield Strength [MPa] Elongation A [%] Hardness HB | HBW Case 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] 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)]
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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

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]
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Heat Treatment

Heat Treatment Step Temperature [°C] Medium
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Cross Reference

Material Name Country Standard
40 CAD 6 12 France NF A 35-552
A355 Grade C USA ASTM A355
34CrAlNi7-10 Germany DIN EN 10085

Producer/Supplier/Trade names

Tradename Supplier
1.8550 H. Kleineberg GmbH, Stelle
34 CrAlNi 7 BÖHLER V 820 voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf
34CrAlNi7 Hoesch Hohenlimburg GmbH, Hagen
34CrAlNi7 ThyssenKrupp Steel Europe AG, Duisburg
34CrAlNi7 voestalpine AG, Linz
34CrAlNi7 Georgsmarienhütte GmbH, Georgsmarienhütte
34CrAlNi7 Swiss Steel International GmbH, Düsseldorf
34CrAlNi7 Dörrenberg Edelstahl GmbH, Engelskirchen
34CrAlNi7 Walzwerke Einsal GmbH, Nachrodt
34CrAlNi7 Willy Haecker GmbH, Hückeswagen
34CrAlNi7 Hagenkötter GmbH & Co., Solingen
34CrAlNi7 Platestahl Umformtechnik GmbH, Lüdenscheid
34CrAlNi7 Hermann Stahlschmidt Stahlgesellschaft m. b. H., Willich
34CrAlNi7 Haage Anagramm Technologien GmbH, Mülheim a. d. Ruhr
34CrAlNi7 C.D. Wälzholz GmbH & Co. KG, Hagen
34CrAlNi7 HEINE + BEISSWENGER Stiftung + Co.KG, Fellbach
34CrAlNi7 Tata Steel, IJmuiden
34CrAlNi7 Günther + Schramm GmbH, Oberkochen
34CrAlNi7 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten
34CrAlNi7 Sidenor Deutschland, Düsseldorf
34CrAlNi7 ASCOMETAL GmbH, Erkrath
Almenit 8550 Almenit, Mittelberg
BGH 8550 BGH Edelstahl Siegen GmbH
BÖHLER V820 voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg
Buderus 34CrAlNi7 Buderus Edelstahl GmbH, Wetzlar
DIRO-34CrAlNi7 DIROSTAHL, Remscheid
Eschmann 8550 EschmannStahl GmbH, Reichshof-Wehnrath
EWK 34CrAlNi7 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten
Heros 8550 Aubert&Duval Special Steel GmbH, Mönchengladbach
Klöckner 34CrAlNi7 Klöckner & Co SE, Duisburg
N 35 ZAPP AG, Ratingen
NS 23 Gustav Grimm Edelstahlwerk GmbH & Co. KG, Remscheid
P.K 3 AUBERT & DUVAL Deutschland GmbH, München

Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Density

Temperature [°C] Density [g/cm³]
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Linear-elastic

Temperature [°C] Young's modulus [GPa] Bulk modulus [GPa] Shear modulus [GPa] Poisson's ratio
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Alternating stress

Temperature [°C] Stress ratio Mean stress [MPa] Alternating stress [MPa] Cycles
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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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Thermal conductivity

Temperature [°C] Thermal conductivity [W/(m*K)]
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Electrical resistivity

Temperature [°C] Specific electrical resistance [µΩm]
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Designation

Designation Material number Source
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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