Germany · DIN

42 CrMo 4

DIN EN 10083-3:2007 — Steels for quenching and tempering - Part 3: Technical delivery conditions for alloy steels

Chemical composition

ElementminmaxSimilarRemarks
C0.380.45
Cr0.91.2
Mn0.60.9
Mo0.150.3
P0.025
S0.035
Si0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
sections, Surface Hardened, d <= 250 mmHR ≥53 HRC
bars, open die forgings and die forgings +QT, 100 < d <= 160 mm or 60 < t <= 100 mmt - 厚度)t - 厚度)t - 厚度)t - 厚度)t - 厚度)
bars, open die forgings and die forgings +QT, 16 < d <= 40 mm or 8 < t <= 20 mmt - 厚度)t - 厚度)t - 厚度)t - 厚度)t - 厚度)
bars, open die forgings and die forgings +QT, 160 < d <= 250 mm or 100 < t <= 160 mmt - 厚度)t - 厚度)t - 厚度)t - 厚度)t - 厚度)
bars, open die forgings and die forgings +QT, 40 < d <= 100 mm or 20 < t <= 60 mmt - 厚度)t - 厚度)t - 厚度)t - 厚度)t - 厚度)
bars, open die forgings and die forgings +QT, d <= 16 mm or t <= 8 mmt - 厚度)t - 厚度)t - 厚度)t - 厚度)
bars, HB半成品  处理以改进剪切性 (+S) 255
bars, open die forgings and die forgings +A, semi-finished products, flats钢棒 HB

Physical properties

20.0

Elastic modulusMean thermal expansionThermal conductivitySpecific heatResistivityDensityPoisson's ratio
210.0033.50460.000.197.85

Typical physical values

DensityElastic modulusPoisson's ratioRemarks
7.72–8.00190.00–210.000.27–0.30典型属性数值，工具钢。此值不来源于标准，它是指示性指标，不能被用于设计用途。
7.85200.00–207.000.27–0.30低碳钢低合金钢的材料性能属性数值，此值不来源于标准，它是指示性指标，不能被用于设计用途。

Fatigue

1.Semi Finished products; Thickness: <= 16 mm; 淬火及回火 (+QT); Reversed bending; T: 20°C; -

Test conditions
ItemDetail
ProductSemi Finished products; Thickness: <= 16 mm; +QT
ExperimentReversed bending; T: 20°C
Specimen
Monotonic
PropertyValue
Yield strength (MPa)900.0
Tensile strength (MPa)1000.0 1300.0
Elongation (%)10.0
Reduction of area (%)40.0
Stress life
No.Cycles
11E7

Heat treatment

Type1
Heat-treatment curveCCT modified
Heat-treatment curveHardness-Tempering
Heat-treatment curveCCT
Heat-treatment curveTTT
Heat-treatment curve淬透性

Similar grades

GradeRegionSystem
708A42United KingdomB.S.
1.7225ItalyUNI
1.7225SpainUNE
1.7225RomaniaSTAS
42 CrMo 4RomaniaSTAS
1.7225SwedenSS
42 CrMo 4SwedenSS
1.7225SwitzerlandSNV
42 CrMo 4SwitzerlandSNV
1.7225FinlandSFS
42 CrMo 4FinlandSFS
1.7225PolandPN
42 CrMo 4PolandPN
1.7225AustriaONORM
42 CrMo 4AustriaONORM
1.7225NorwayNS
1.7225BelgiumNBN
1.7225HungaryMSZ
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1.7225Czech RepublicCSN
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1.7225BulgariaBDS
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1.7225United KingdomB.S.
1.7225FranceAFNOR NF
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