#003 The Chemical Composition of Steel for Mold Manufacturing
Category : Mold Materials
July15, 2009
The steel used in molds for plastic molding have ferrite- carbon alloy (which is normally called steel) as the basic material. It is helpful to know the chemical composition of some typical types of steel as a basic knowledge, because that will become useful when considering the heat treatment and mechanical characteristics, etc.
A table of that data is given below.
Steel name | Symbol | Content ratio of chemical constituents (%) |
C | Si | Mn | P | S | Ni | Cr | Mo | W | V |
Rolled steel for general structures | [SS400] [1018 Steel Equivalent] [1.0040_ Ust.42.2] | | | | 0.06 | 0.06 | | | | | |
Carbon steel for mechanical structures | [S50C] [1049 Steel] [1.126_C50E (Ck50)] | 0.45 -0.55 | 0.15 -0.40 | 0.40 -0.85 | 0.035 | 0.04 | | | | | |
Chrome molybdenum steel | SCM3 | 0.33 -0.38 | 0.15 -0.35 | 0.60 -0.85 | 0.03 | 0.03 | | 0.90 -1.20 | 0.15 -0.35 | | |
Stainless steel | SUS23 | 0.25 -0.40 | 0.75 | 1.00 | 0.04 | 0.03 | | 12 -14 | | | |
Carbon tool steel | [SK5] [W1-8] [1.1525_ C80W1] | 0.80 -0.90 | 0.35 | 0.50 | 0.03 | 0.03 | | | | | |
Alloy tool steel | [SKS3] [A1 or 01 Tool Steel] [1.2510_ 100MnCrW4] | 0.90 -1.00 | 0.35 | 0.90 -1.20 | 0.03 | 0.03 | | 0.50 -1.00 | | 0.50 -1.00 | |
Alloy tool steel hot die steel | [SKD61] [H13 Tool Steel] [1.2344_ X40CrMoV5 -1] | 0.32 -0.42 | 0.80 -1.20 | 0.50 | 0.03 | 0.03 | | 4.50 -5.00 | 1.00 -1.50 | | 0.8 -1.2 |
Alloy tool steel cold die steel | [SKD11] [D2 Tool Steel] [1.2379_ X155CrVMo12 -1] | 1.40 -1.60 | 0.40 | 0.50 | 0.03 | 0.03 | | 11.0 -13.0 | 0.80 -1.20 | | 0.2 -0.5 |
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