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34CrAlNi7-10 | 1.8550 Material Datasheet

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Material Description

Material Number Material Number (single) Standard Scope Standard Status Country Predecessor Successor VDA 231-106 classification
1.8550 (DIN EN 10085 : 2001-07) 1.8550 DIN EN 10085 : 2001-07 DIN EN 10085 : 2001-07 replaced by DIN EN ISO 683-5 : 2021-08 Replaced Germany 34CrAlNi7-10 34CrAlNi7-10 1.1 1)
1) Remark: 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 [%]
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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
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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)

Semi-finished Product Condition Nominal Size [mm] Temperature [°C] Specimen Shape Specimen Direction Notch Impact Energy [J]
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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
34CrAlNi7-10 Europe EN 10085
34CrAlNi7-10 International ISO 683-5 1)
A355 Grade C USA ASTM A355 1)
K52440 USA UNS 1)
34CrAlNi7 1)
1) Source: Stahlschlüssel 2016, Verlag Stahlschlüssel Wegst GmbH, Marbach

Producer/Supplier/Trade names

Tradename Supplier
1.8550 H. Kleineberg GmbH, Stelle
1.8550 INTERSTAHL Service GmbH, Wetter
1.8550 Rosswag GmbH, Pfinztal-Kleinsteinbach
1.8550 ET Edelstahl-Trading GmbH, Willich
1.8550 Eisen-Heinzl GmbH, Selb-Erkersreuth
1.8550 SIJ MWT GmbH, Landsberg am Lech
34CrAlNi7 Hoesch Hohenlimburg GmbH, Hagen
34CrAlNi7 Georgsmarienhütte GmbH, Georgsmarienhütte
34CrAlNi7 Walzwerke Einsal GmbH, Nachrodt
34CrAlNi7 Willy Haecker GmbH, Hückeswagen
34CrAlNi7 Hagenkötter GmbH & Co., Solingen
34CrAlNi7 Chr. Höver & Sohn GmbH & Co KG, Lindlar
34CrAlNi7 Hermann Stahlschmidt Stahlgesellschaft m. b. H., Willich
34CrAlNi7 Haage Anagramm Technologien GmbH, Mülheim a. d. Ruhr
34CrAlNi7 Schmiedewerke Gröditz GmbH, Gröditz
34CrAlNi7 HEINE + BEISSWENGER Stiftung + Co.KG, Fellbach
34CrAlNi7 Günther + Schramm GmbH, Oberkochen
34CrAlNi7 ASCOMETAL GmbH, Erkrath
34CrAlNi7 Hammerwerk Erft, G. Diederichs GmbH & Co. KG, Bad Münstereifel-Arloff
34CrAlNi7 STM Stahl Vertriebs GmbH, Gräfelfing
34CrAlNi7 pauly STAHLHANDEL, Essen
34CrAlNi7 Swiss Steel International GmbH, Düsseldorf
34CrAlNi7 voestalpine AG, Linz
34CrAlNi7 Tata Steel, IJmuiden
34CrAlNi7 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten
34CrAlNi7 Sidenor Deutschland, Düsseldorf
BGH 8550 BGH Edelstahl Siegen GmbH
BÖHLER V 820 voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf
BÖHLER V820 voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg
Buderus 34CrAlNi7-10 Buderus Edelstahl GmbH, Wetzlar
CR AN7 Aubert&Duval Special Steel GmbH, Mönchengladbach
DIRO-34CrAINi7 DIROSTAHL, Remscheid
Eschmann 8550 EschmannStahl GmbH, Reichshof-Wehnrath
Klöckner 34CrAINi7 Klöckner & Co SE, Duisburg
N 35 ZAPP AG, Ratingen
Ni 50 Dörrenberg Edelstahl GmbH, Engelskirchen
NITRODUR 34CrAlNi7 Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG, Witten
NS 23 Gustav Grimm Edelstahlwerk GmbH & Co. KG, Remscheid
PK 3 AUBERT & DUVAL Deutschland GmbH, München
Plate 34CrAINi7 Platestahl Umformtechnik GmbH, Lüdenscheid

Material Compliance

REACh RoHS
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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] Constant a for size factor Kd for yield stress Rp Constant a for size factor Kd for tensile strength Rm
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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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Alternating stress

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

Designation Material number Source
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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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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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