Romania · STAS

42 CrMo 4

SR EN 10132-3

Chemical composition

wt% · log scale
0.010.1110C0.38 – 0.45Cr0.9 – 1.2Mn0.6 – 0.9Mo0.15 – 0.3P0.035S0.035Si0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Tensile strength Rm1100–1600 MPaHardnessHVHardnessHRnarrow strip +QT, >= 0.3 <= 3 mmYield strength Rp0.2≤480 MPaTensile strength Rm≤620 MPaElongation A≥15 %HardnessHVHardnessHRnarrow strip, annealed or annealed skin passed , >= 0.3 <= 3 mm

Physical properties

vs. temperature
Elastic modulus GPa
155 – 210°C
Mean thermal expansion 10⁻⁶/K
11.1 – 14.1°C
Thermal conductivity W/(m·K)
33.5 – 34.2°C

Fatigue S-N curve

stress vs. cycles (log)
165255345435525110Cycles
  • 2. Billet; Thickness (mm): 150; Width (mm): 150; quenched and tempered; Austenitized at 860°C/30 min, oil quenched, tempered 620°C/2h; Steel produced by continuous casting; Total strain control; R=-1; Frequency: 1 Hz; T: 20°C; Cylindrical; Diameter [mm]: 55
  • 3. Billet; Thickness (mm): 150; Width (mm): 150; quenched and tempered; Austenitized at 860°C/30 min, oil quenched, tempered 620°C/2h; Steel produced by ingot; Total strain control; R=-1; Frequency: 1 Hz; T: 20°C; Cylindrical; Diameter [mm]: 55
  • 4. Shaft; Diameter (mm): 25; quenched and tempered; Total strain control; R=-1; Frequency: 0.1-11 Hz; T: 23°C; Hourglass shaped; Diameter [mm]: 6; Gauge length [mm]: 4; direction: L
  • 5. Normalized; 930°C/3h furnace; Total strain control; R=-1; Frequency: 0.5-5 Hz; T: 23°C; Cylindrical; Diameter [mm]: 6; Gauge length [mm]: 14; direction: L

Chemical composition

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

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
narrow strip +QT, >= 0.3 <= 3 mm1100–1600HV 340–490 HRC；HR 35–48 HRC
narrow strip, annealed or annealed skin passed , >= 0.3 <= 3 mm≤480≤620≥15 Lo = 80 mmHV ≤195 HRB；HR ≤90 HRB

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
7.72–8.00190.00–210.000.27–0.30Typical property values for tool steel. These values are not taken from the standard; they are indicative and must not be used for design.
7.85200.00–207.000.27–0.30Material properties for low-carbon low-alloy steel. These values are not taken from the standard; they are indicative and must not be used for design.

Fatigue

1.Semi Finished products; Thickness: <= 16 mm; quenched and tempered (+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 curveHardenability

Similar grades

GradeRegionSystem
1.7225ItalyUNI
1.7225SpainUNE
1.7225RomaniaSTAS
1.7225SwedenSS
42 CrMo 4SwedenSS
1.7225SwitzerlandSNV
42 CrMo 4SwitzerlandSNV
1.7225FinlandSFS
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1.7225PolandPN
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1.7225AustriaONORM
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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
42 CrMo 4NorwayNS
42 CrMo 4BelgiumNBN
42 CrMo 4SpainUNE
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1.7225GermanyDIN
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