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28Cr4 | 1.7030 Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country Predecessor Successor VDA 231-106 classification
1.7030 (DIN EN 10084 : 2008-06) 28Cr4 1.7030 DIN EN 10084 : 2008-06 DIN EN 10084 : 2008-06 replaced by DIN EN ISO 683-3 : 2018-09 Replaced Germany 28Cr4 28Cr4 1.1.1 1)
1) Remark: Steel 28Cr4 is suitable for smaller parts of slightly higher load in vehicle manufacturing, engine and machine engineering (e.g. transmission gears, driving shafts).

Chemical Composition

C [%] Cr [%] Mn [%] 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] Hardness HB | HBW
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Physical Properties

Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Poisson's Ratio 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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Hardenability (Jominy test)

Condition Front Distance [mm] Hardness HRC (+H grade) Hardness HRC (+HH grade) Hardness HRC (+HL grade)
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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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Heat Treatment

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

Material Name Country Standard
30Cr China GB/T 3077 1)
A20302 China GB/T 3077 1)
30Cr China YB/T 5132 1)
A20302 China YB/T 5132 1)
28Cr4 Europe EN 10084
28Cr4 International ISO 683-3 1)
SCr430H Japan JIS G 4052 1)
30Ch Russia GOST 4543 1)
30Х Russia GOST 4543 1)
SCr430H South Korea KS D 3754 1)
A434 Grade 5130 USA ASTM A434 1)
A914 Grade 5130RH USA ASTM A914 1)
5130 USA SAE 1)
5130H USA SAE 1)
5130RH USA SAE 1)
1) Source: Stahlschlüssel 2016, Verlag Stahlschlüssel Wegst GmbH, Marbach

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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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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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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Tensile strength

Temperature [°C] Tensile strength [MPa]
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