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#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 nameSymbolContent ratio of chemical constituents (%)
CSiMnPSNiCrMoWV
Rolled steel for general structures[SS400]
[1018 Steel
Equivalent]
[1.0040_
Ust.42.2]
   0.060.06     
Carbon steel for mechanical structures[S50C]
[1049 Steel]
[1.126_C50E
(Ck50)]
0.45
-0.55
0.15
-0.40
0.40
-0.85
0.0350.04     
Chrome molybdenum steelSCM30.33
-0.38
0.15
-0.35
0.60
-0.85
0.030.03 0.90
-1.20
0.15
-0.35
  
Stainless steelSUS230.25
-0.40
0.751.000.040.03 12
-14
   
Carbon tool steel[SK5]
[W1-8]
[1.1525_
C80W1]
0.80
-0.90
0.350.500.030.03     
Alloy tool steel[SKS3]
[A1 or 01
Tool Steel]
[1.2510_
100MnCrW4]
0.90
-1.00
0.350.90
-1.20
0.030.03 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
0.500.030.03 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
0.400.500.030.03 11.0
-13.0
0.80
-1.20
 0.2
-0.5

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