Carbon and Low Alloy Steels

Carbon and low alloy steels are the workhorses of the mechanical world. No other class of materials offers as wide a range of mechanical properties as economically. Carbon steels are alloys of iron, carbon, manganese, and silicon.

Low alloy steels are similar to carbon steels but have additional alloying elements like chromium, molybdenum, etc., to improve their heat treat response. With heat treating, ultimate strengths from about 60 – 300 ksi are possible within this group of materials. Utilizing specialized heat treating processes, it is possible to engineer parts with specific properties in different areas of the same part. An example of this would be first heat treating the casting to a very tough condition for impact resistance, then applying a second surface hardening heat treatment to make the surface wear resistant.

Mechanical Properties

Compare
Alloy Tensile Strength   Yield Strength (0.2%)   Hardness   Hardness  
PSI x 103
PSI x 103
Rockwell B (HRC)
Rockwell C (HRC)
IC 1010 (Annealed)
60
50
-
-
IC 1020 (Annealed)
70
45
80
-
IC 1020 (Normalized)
75.5
51.7
80
-
IC 1025 (Annealed) Mechanical Properties
73
47
80
-
IC 1030 (Annealed)
75
62
75
-
IC 1030 (Hardened)
130
110
-
50
IC 1035 (Annealed)
80
60
80
-
IC 1035 (Hardened)
130
110
-
52
IC 1045 (Annealed)
90
60
90
-
IC 1045 (Hardened)
150
120
-
57
IC 1050 (Annealed)
110
65
90
-
IC 1050 (Hardened)
180
160
-
60
IC 1060 (Annealed)
120
70
90
-
IC 1060 (Hardened)
180
170
-
60
IC 4130 (Annealed)
125
70
85
-
IC 4130 (Hardened)
240
210
-
50
IC 4140 (Annealed)
-
-
90
-
IC 4140 (Hardened)
260
240
-
57
IC 4150 (Annealed)
-
-
90
-
IC 4150 (Hardened)
270
250
-
58
IC 4330 (Annealed)
-
-
85
-
IC 4330 (Hardened)
260
240
-
50
IC 4340 (Annealed)
-
-
90
-
IC 4340 (Hardened)
270
240
-
57
IC 4620 (Annealed)
95
60
80
-
IC 4620 (Hardened)
215
190
-
45
IC 52100 (Annealed)
-
-
100
-
IC 52100 (Hardened)
280
260
-
65
IC 6150 (Annealed)
-
-
90
-
IC 6150 (Hardened)
280
250
-
60
IC 8620 (Annealed)
95
60
80
-
IC 8620 (Hardened)
215
190
-
45
IC 8625 (Hardened)
220
190
-
-
IC 8630 (Annealed)
110
-
85
-
IC 8630 (Hardened)
240
210
-
50
IC 8640 (Annealed)
-
-
90
-
IC 8640 (Hardened)
270
240
-
60
WCB (Normalized)
85
62
95
70

 

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Last updated 12.10.2023