8620 — ASTM A311


CTI Color-Brown
The most widely used carburizing alloy. The well balanced alloy content of this grade permits hardening to produce a string, tough core and high case hardness. Additionally 8620 has good welding characteristics.

Chemistry
Carbon
0.38/0.43
 
Manganese
0.75/1.00
 
Phosphorus (Max.)
0.035
 
Sulfur (Max.)
0.04
 
Silicon
0.15/0.35
 
Chromium
0.80/1.10
 
Molybdenum
0.15/0.25
 
Typical Mechanical Properties
Tensile Strength
95,000 psi
 
Yield Strength
80,000 psi
 
Elongation in 2”
15%
 
Reduction of Area
50%
 
Brinell Hardness
200
 

Machinability
65% of 1212

Applications
Highly stressed parts, or parts subject to severe wear.