ASTM 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel. ASTM 4140 steel Bar/Tube is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weld ability, at the expense of through thickness strength.
AISI Alloy 4130 Steel Supply Range
4130 Steel Round Bar: diameter 8mm – 3000mm
4130 Steel Plate/Flat Bar: thickness 10mm – 1500mm x width 200mm – 3000mm
4130 Steel Tube: outer diameter 4mm to 800mm
We can supply any size based on customer's requirements.
4130 Steel Plate/Flat Bar: thickness 10mm – 1500mm x width 200mm – 3000mm
4130 Steel Tube: outer diameter 4mm to 800mm
We can supply any size based on customer's requirements.
AISI4130 Steel Specification and Relevant Standards
Country |
USA
|
BS
|
BS
|
Japan
|
Standard
|
ASTM A29
|
EN 10250/EN10083
|
BS 970
|
JIS G4105
|
Grades
|
4130
|
25CrMo4/1.7218
|
708A25/708M25
|
SCM430
|
Standard |
Grade
|
C
|
Mn
|
P
|
S
|
Si
|
Cr
|
Mo
|
ASTM A29
|
4130
|
0.28-0.33
|
0.40-0.60
|
0.035
|
0.040
|
0.15-0.35
|
0.80-1.10
|
0.15-0.25
|
EN10250
/EN10083 |
25CrMo4/
1.7218 |
0.22-0.29
|
0.60-0.90
|
0.025
|
0.035
|
≦0.40
|
0.90-1.2
|
0.15-0.30
|
JIS G4105
|
SCM430/
SCM2 |
0.28-0.33
|
0.60-0.85
|
0.030
|
0.030
|
0.15-0.35
|
0.90-1.2
|
0.15-0.30
|
Hardening of AISI 4130 Alloy Steel
The steel 4130 should be constituents transformed to austenite – at 1500 to 1600 º F (815 to 870 º C). The actual temperature is a function of chemical composition within the analysis range, section size and cooling method.
Application of 4130 Steel
ASTM 4140 steel Bar/Tube is mainly used in Commercial aircraft, aircraft engine mounts, Military aircraft, Automotive, Machine tools, Hydraulic tools, Auto racing, Agricultural and defense industries etc.
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