The chemical composition of AISI 4130 alloy steel is listed in the following table.
Element
Content (%)
Iron, Fe
97.03 – 98.22
Chromium, Cr
0.80 – 1.10
Manganese, Mn
0.40 – 0.60
Carbon, C
0.280 – 0.330
Silicon, Si
0.15 – 0.30
Molybdenum, Mo
0.15 – 0.25
Sulfur, S
0.040
Phosphorous, P
0.035
Physical Properties
The following table shows the physical properties of AISI 4130 alloy steel.
Properties
Metric
Imperial
Density
7.85 g/cm3
0.284 lb/in³
Melting point
1432°C
2610°F
Mechanical Properties
The mechanical properties of AISI 4130 alloy steel are outlined in the following table.
Properties
Metric
Imperial
Tensile strength, ultimate
560 MPa
81200 psi
Tensile strength, yield
460 MPa
66700 psi
Modulus of elasticity
190-210 GPa
27557-30458 ksi
Bulk modulus (Typical for steel)
140 GPa
20300 ksi
Shear modulus (Typical for steel)
80 GPa
11600 ksi
Poissons ratio
0.27-0.30
0.27-0.30
Elongation at break (in 50 mm)
21.50%
21.50%
Reduction of area
59.6
59.60%
Hardness, Brinell
217
217
Hardness, Knoop (Converted from Brinell hardness)
240
240
Hardness, Rockwell B (Converted from Brinell hardness)
95
95
Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.)
17
17
Hardness, Vickers (Converted from Brinell hardness)
228
228
Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.)
70
70
Thermal Properties
The thermal properties of AISI 4130 alloy steel are outlined in the following table.
Properties
Metric
Imperial
Thermal conductivity (100°C)
42.7 W/mK
296 BTU in/hr.ft2. °F
Other Designations
Other designations that are equivalent to AISI 4130 alloy steel include the following.
AMS 6348
AMS 6371
ASTM A331
ASTM A829
DIN 1.7218
AMS 6350
AMS 6373
ASTM A506
MIL S-18729
UNI 25 CrMo 4
AMS 6351
AMS 6374
ASTM A507
MIL S-6758
JIS SCCrM 1
AMS 6360
AMS 6528
ASTM A513
SAE J1397
JIS SCM 2
AMS 6361
AMS 7496
ASTM A519
SAE J404
SS 2225
AMS 6362
ASTM A29
ASTM A646
SAE J412
B.S. CDS 110
AMS 6370
ASTM A322
ASTM A752
AFNOR 25 CD 4 (S)
SAE J770