Global · Enterprise standard

4130

-- — -

Chemical composition

wt% · log scale

min – max range
typical value

Fatigue S-N curve

stress vs. cycles (log)

3.Heat treated; T: 20°C; -
4.927°C/30 min, water, 650°C/30 min; T: 23°C; -
5.毛培; Diameter (mm): 19; 淬火和回火; 870°C/0.5h 水, 400°C/1h空气; Total diametral strain control; R=-1; T: 23°C; Hourglass shaped; Diameter [mm]: 6.35; Gauge length diametral; 方向: L
6.淬火和回火; T: 20°C; -
7.Heat treated; 366 HB; T: 20°C; -
8.Heat treated; 259 HB; T: 20°C; -

Chemical composition

Element	min	max
C	0.28	0.33
Cr	0.8	1.1
Mn	0.4	0.6
Mo	0.15	0.25
P		0.4
S		0.4
Si	0.15	0.6

Fatigue

Condition

1.棒材; 25.4 mm; 正火; Axial; T: 20°C; 方向: L

Test conditions

Item	Detail
Product	bars; 25.4 mm; normalized
Experiment	Axial; T: 20°C
Specimen	Direction: L

Monotonic

Property	Value
Yield strength (MPa)	434.0
Tensile strength (MPa)	669.0
Elongation (%)	26.0
Reduction of area (%)	60.0
Hardness (HB)	197.0

Stress life

No.	Specimen	Cycles
1	Direction: L	E7

2.棒材; 25.4 mm; 水淬和650°C (1200F); Bending; T: 20°C; Rotating beam; 方向: L

Test conditions

Item	Detail
Product	bars; 25.4 mm; 650°C (1200F)
Experiment	Bending; T: 20°C
Specimen	Rotating beam; Direction: L

Monotonic

Property	Value
Yield strength (MPa)	703.0
Tensile strength (MPa)	814.0
Elongation (%)	22.0
Reduction of area (%)	64.0
Hardness (HB)	245.0

Stress life

No.	Specimen	Cycles
1	Rotating beam; Direction: L	E7

3.Heat treated; T: 20°C; -

Test conditions

Item	Detail
Product	Heat treated
Experiment	T: 20°C
Specimen

Monotonic

Property	Value
Elastic modulus (GPa)	200.0
Yield strength (MPa)	1358.0
Tensile strength (MPa)	4127.0
Reduction of area (%)	55.0
True fracture strength (MPa)	1820.0
True fracture ductility (%)	0.79
Hardness (HB)	360.0

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 b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	798	0.1300	1839	1714.0	-0.08	0.84	-0.68

Stress life

No.	Stress (MPa)	Cycles
1	537	2E6

4.927°C/30 min, water, 650°C/30 min; T: 23°C; -

Test conditions

Item	Detail
Product	927°C/30 min water 650°C/30 min
Experiment	T: 23°C
Specimen

Monotonic

Property	Value
Elastic modulus (GPa)	210.0
Poisson's ratio	0.285

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 b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	512	0.1970	1741	1553	-0.1053	0.1864	-0.3500

Stress life

No.	Stress (MPa)	Cycles
1	337	2E6

5.毛培; Diameter (mm): 19; 淬火和回火; 870°C/0.5h 水, 400°C/1h空气; Total diametral strain control; R=-1; T: 23°C; Hourglass shaped; Diameter [mm]: 6.35; Gauge length diametral; 方向: L

Test conditions

Item	Detail
Product	Diameter (mm): 19; quenched and tempered; 870°C/0.5h 400°C/1h空气
Experiment	Total diametral strain control; R=-1; T: 23°C
Specimen	Hourglass shaped; Diameter [mm]: 6.35; Gauge length diametral; Direction: L

Monotonic

Property	Value
Elastic modulus (GPa)	200.0
Yield strength (MPa)	1359.0
Tensile strength (MPa)	1427.0
Reduction of area (%)	54.7
True fracture strength (MPa)	2083.0
True fracture ductility (%)	0.79
Strength coefficient (MPa)	1660.0
Strain-hardening exponent	0.033
Poisson's ratio	0.28
Hardness (HRC)	39.0 40.0

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 b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	813	0.1240	1756	1669	-0.0782	0.8016	-0.6715

Stress life

No.	Specimen	Stress (MPa)	Cycles
1	Hourglass shaped; Diameter [mm]: 6.35; Gauge length diametral; Direction: L	537	2E6

6.淬火和回火; T: 20°C; -

Test conditions

Item	Detail
Product	quenched and tempered
Experiment	T: 20°C
Specimen

Monotonic

Property	Value
Elastic modulus (GPa)	200.0
Yield strength (MPa)	1358.0
Tensile strength (MPa)	1427.0
Reduction of area (%)	55.0
True fracture strength (MPa)	1820.0
True fracture ductility (%)	0.79
Hardness (HB)	360.0

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 b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	827	0.1200	1765	1696.0	-0.08	0.89	-0.69

Stress life

No.	Stress (MPa)	Cycles
1	531	1E7

7.Heat treated; 366 HB; T: 20°C; -

Test conditions

Item	Detail
Product	Heat treated; 366 HB
Experiment	T: 20°C
Specimen

Monotonic

Property	Value
Elastic modulus (GPa)	200.0
Yield strength (MPa)	1358.0
Tensile strength (MPa)	1427.0
Reduction of area (%)	54.7
Hardness (HB)	366.0

Strain life

No.	Cyclic strain-hardening exponent n′	Cyclic strength coefficient K′ (MPa)	Fatigue strength coefficient σ′f (MPa)	Fatigue strength exponent b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	0.1140	1696	1655.0	-0.076	0.803	-0.672

Stress life

No.	Stress (MPa)	Cycles
1	549	2E6

8.Heat treated; 259 HB; T: 20°C; -

Test conditions

Item	Detail
Product	Heat treated; 259 HB
Experiment	T: 20°C
Specimen

Monotonic

Property	Value
Elastic modulus (GPa)	221.0
Yield strength (MPa)	778.0
Tensile strength (MPa)	896.0
Reduction of area (%)	67.3
Hardness (HB)	259.0

Strain life

No.	Cyclic strain-hardening exponent n′	Cyclic strength coefficient K′ (MPa)	Fatigue strength coefficient σ′f (MPa)	Fatigue strength exponent b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	0.1190	1264	1261.0	-0.077	0.985	-0.648

Stress life

No.	Stress (MPa)	Cycles
1	413	2E6

9.淬火和回火; 258 HB; T: 20°C; 方向: L

Test conditions

Item	Detail
Product	quenched and tempered; 258 HB
Experiment	T: 20°C
Specimen	Direction: L

Monotonic

Property	Value
Elastic modulus (GPa)	221.0
Yield strength (MPa)	779.0
Tensile strength (MPa)	896.0
Reduction of area (%)	67.0
True fracture strength (MPa)	1420.0
True fracture ductility (%)	1.12
Hardness (HB)	258.0

Strain life

No.	Cyclic yield strength (MPa)	Cyclic strain-hardening exponent n′	Fatigue strength coefficient σ′f (MPa)	Fatigue strength exponent b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	565	0.1300	1276.0	-0.083	0.92	-0.63

Stress life

No.	Specimen	Stress (MPa)	Cycles
1	Direction: L	383	2E6

10.淬火和回火; 365 HB; T: 20°C; 方向: L

Test conditions

Item	Detail
Product	quenched and tempered; 365 HB
Experiment	T: 20°C
Specimen	Direction: L

Monotonic

Property	Value
Elastic modulus (GPa)	200.0
Yield strength (MPa)	1358.0
Tensile strength (MPa)	1427.0
Reduction of area (%)	55.0
True fracture strength (MPa)	1820.0
True fracture ductility (%)	0.79
Hardness (HB)	365.0

Strain life

No.	Cyclic yield strength (MPa)	Cyclic strain-hardening exponent n′	Fatigue strength coefficient σ′f (MPa)	Fatigue strength exponent b	Fatigue ductility coefficient ε′f	Fatigue ductility exponent c
1	827	0.1200	1696.0	-0.081	0.89	-0.69

Stress life

No.	Specimen	Stress (MPa)	Cycles
1	Direction: L	524	2E6