AISI 8630

  • This is a low alloy steel containing nominally 0.3% Carbon, 0.5% Chrome, 0.2% Molybdenum and 0.5% Nickel.

Chemical Composition

8630 Standard Analysis

C Si Mn P S Ni Cr Mo
Min 0.28 0.15 0.70 - - 0.40 0.40 0.15
Max 0.33 0.35 0.90 0.035 0.04 0.70 0.60 0.25

8630 Modified Analysis

C Si Mn P S Ni Cr Mo
Min 0.28 0.15 0.75 - - 0.70 0.40 0.35
Max 0.33 0.35 0.95 0.035 0.04 0.90 0.60 0.45

 

Mechanical Properties

Condition Hardened & Tempered
UTS 95KSI min
0.2% Proof Stress 75KSI min
Elongation 17% min
Reduction of Area 35% min

General Scope

  • The alloy is popular in Oil Field applications, typically for connectors, hangers and block valves. Strength can be increased by heat treatment.