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Materials

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AISI O1
Category Steel
Class Tool steel
Type Oil-hardening cold work steel
Designations  Germany: DIN 1.2510
United Kingdom: B.S. BO 1
United States: ASTM A681 , FED QQ-T-570 , SAE J437 , SAE J438 , UNS T31501

Composition
ElementWeight %
C  0.85-1.00 
Mn  1.00-1.40 
Si  0.50 
Cr  0.40-0.60 
Ni  0.30 
W  0.40-0.60 
V  0.30 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.85 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) 10.6  20-260 more  
Glossary
FREE Publications
CNC Machining Design Guide

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

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Selecting the Right 3D Printer

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

more publications