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AISI O2
Category Steel
Class Tool steel
Type Oil-hardening cold work steel
Designations  France: AFNOR 90 MV 8
Germany: DIN 1.2842
Italy: UNI 88 Mn V 8 KU
United Kingdom: B.S. Bo 2
United States: ASTM A681 , FED QQ-T-570 , SAE J437 , SAE J438 , UNS T31502

Composition
ElementWeight %
C  0.85-0.95 
Mn  1.40-1.80 
Si  0.50 
Cr  0.35 
Ni  0.30 
Mo  0.30 
V  0.30 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.66 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 11.2  20-100 more  
Glossary
STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Salary Expectation

8 things to know about the interview question "What's your salary expectation"?

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.