Finland · SFS

1.1191

SFS EN 10132-3

Chemical composition

wt% · log scale
0.010.1110C0.42 – 0.5Cr0.4Mn0.5 – 0.8Mo0.1Ni0.4P0.035S0.035Si0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Tensile strength Rm≤1020 MPaHardnessHVnarrow strip +CR, >= 0.3 <= 3 mmYield strength Rp0.2≤455 MPaTensile strength Rm≤570 MPaElongation A≥18 %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

Fatigue S-N curve

stress vs. cycles (log)
-94.318045573010041101001kCycles
  • 7. Hot-rolled bar; Diameter (mm): 20; annealed and normalized; Normalized 870°C/30 min, annealed 600°/90 min argon, air; Total strain control; Frequency: 5 Hz; T: 23°C; Cylindrical; Diameter [mm]: 7; Gauge length [mm]: 10
  • 1. Round steel; Ø 14.3 mm; cold-drawn; Tempered 182°C; Stress control; R=-1; Frequency: >=0.016 Hz; T: 23°C; Cylindrical; Diameter [mm]: 4.8; Gauge length [mm]: 19; direction: L
  • 2. Hot-rolled bar; Ø 25 mm; stress-relieved; 600°C/1h, furnace; Stress control; R=-1; Frequency: <=10 Hz; T: 23°C; Cylindrical; Diameter [mm]: 12; Gauge length [mm]: 35; direction: L
  • 3. Hot-rolled bar; Ø 40 mm; quenched and tempered; Total strain control; R=-1; Frequency: 0.2-10 Hz; T: 23°C; Flat bar; Thickness [mm]: 5; Width [mm]: 10; Gauge length [mm]: 25
  • 4. Hot-rolled bar; Ø 25 mm; stress-relieved; 600°C/1h, furnace; cold rolled; Stress control; R=-1; Frequency: <=10 Hz; T: 20°C; Cylindrical, cold rolled; Diameter [mm]: 12; Gauge length [mm]: 35; direction: L
  • 5. Hot-rolled bar; Ø 25 mm; stress-relieved; 600°C/1h, furnace; nitrided 1 mm depth, quenched in water; Stress control; R=-1; Frequency: <=10 Hz; T: 20°C; Cylindrical, nitrided; Diameter [mm]: 12; Gauge length [mm]: 35; direction: L

Chemical composition

ElementminmaxSimilarRemarks
C0.420.5
Cr0.4
Mn0.50.8
Mo0.1
Ni0.4
P0.035
S0.035
Si0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
narrow strip +CR, >= 0.3 <= 3 mm≤1020HV ≤290
narrow strip, annealed or annealed skin passed , >= 0.3 <= 3 mm≤455≤570≥18 Lo = 50 mmHV ≤180 Hardened 1038℃；HR ≤88 Hardened 1038℃

Physical properties

20.0

Elastic modulusMean thermal expansionThermal conductivitySpecific heatResistivityDensityPoisson's ratio
210.00；190.0050.00460.000.127.85

Typical physical values

DensityElastic modulusPoisson's ratioRemarks
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. Round steel; Ø 14.3 mm; cold-drawn; Tempered 182°C; Stress control; R=-1; Frequency: >=0.016 Hz; T: 23°C; Cylindrical; Diameter [mm]: 4.8; Gauge length [mm]: 19; direction: L

Test conditions
ItemDetail
Productround bar; Ø 14.3 mm; cold drawn; Tempered 182°C
ExperimentStress control; R=-1; Frequency: >=0.016 Hz; T: 23°C
SpecimenCylindrical; Diameter [mm]: 4.8; Gauge length [mm]: 19; Direction: L
Monotonic
PropertyValue
Elastic modulus (GPa)207.0
Yield strength (MPa)1899.0
Tensile strength (MPa)2327.0
Reduction of area (%)37.0
True fracture strength (MPa)2831.0
True fracture ductility (%)0.45
Strength coefficient (MPa)3344.0
Strain-hardening exponent0.093
Hardness (HB)630.0
Strain life
No.Cyclic yield strength (MPa)Cyclic strain-hardening exponent n′Cyclic strength coefficient K′ (MPa)Fatigue strength coefficient σ′f (MPa)Fatigue strength exponent bFatigue ductility coefficient ε′fFatigue ductility exponent c
119440.107037842667-0.07500.0333-0.6793
Stress life
No.SpecimenStress (MPa)Cycles
1Cylindrical; Diameter [mm]: 4.8; Gauge length [mm]: 19; Direction: L8982E6

Heat treatment

Type1
Heat-treatment curveHardness-Tempering
Heat-treatment curveCCT
Heat-treatment curveTTT
Heat-treatment curveHardenability

Similar grades

GradeRegionSystem
1.1191ItalyUNI
C 45 EItalyUNI
1.1191SpainUNE
C 45 ESpainUNE
1.1191RomaniaSTAS
C 45 ERomaniaSTAS
1.1191SwedenSS
C 45 ESwedenSS
1.1191SwitzerlandSNV
C 45 ESwitzerlandSNV
C 45 EFinlandSFS
1.1191PolandPN
C 45 EPolandPN
1.1191AustriaONORM
C 45 EAustriaONORM
1.1191NorwayNS
1.1191BelgiumNBN
1.1191HungaryMSZ
C 45 EHungaryMSZ
1.1191Czech RepublicCSN
C 45 ECzech RepublicCSN
1.1191BulgariaBDS
C 45 EBulgariaBDS
1.1191United KingdomB.S.
1.1191FranceAFNOR NF
C 45 ENorwayNS
C 45 EBelgiumNBN
C 45 EFranceAFNOR NF
C 45 EGermanyDIN
1.1191GermanyDIN
C 45 EUnited KingdomB.S.