SAE4130 Steel Work/steel structures/Steel Machining Parts are Shanghai Katalor’s main products. SAE4130 is a low alloy steel containing molybdenum and chromium as strengthening agents. The carbon content is nominally 0.30% and with this relatively low carbon content the alloy is excellent from the fusion weldability standpoint. The alloy can be hardened by heat treatment.
SAE4130 Steel Work/Steel Structures/Steel Machining Parts is readily machined by conventional methods. Machinability is best with the alloy in the normalized and tempered condition. Although the alloy may be machined in the fully heat treated condition, machinability becomes more difficult with increasing strength (hardness) of the alloy.
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
|
4130 |
0.28~0.33 |
0.40~0.60 |
0.030 |
0.040 |
0.15~0.35 |
0.80~1.10 |
0.15~0.25 |
Specified Maximum Tensile Strength Ksi（MPa） |
Tensile Strength Range |
|
Up to 780 (480) |
15 (100) |
|
Over 70 to 110 (480 to 760) |
20 (135) |
|
Over 110 to 140 (760 to 965) |
25 (170) |
SAE4130 Steel Work/Steel Structures/Steel Machining Parts heat treatments: specified to be furnished in a heat-treated condition shall be heated to a suitable temperature at or above the upper critical temperature, but not exceeding 1700℉ (925℃), held a sufficient length of time to attain essentially uniform temperature throughout, and cooled as appropriate for the condition specified.
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