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Essentials of Manufacturing

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CNC Machining Design Guide

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AISI L6
Category Steel
Class Tool steel
Type Low-alloy special-purpose tool steel
Designations United States: UNS T61206

Composition
ElementWeight %
C  0.65-0.75 
Mn  0.25-0.80 
Si  0.50 
Cr  0.60-1.20 
Ni  1.25-2.00 
Mo  0.50 
V  0.20-0.30(a) 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.86 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 655  25  annealed  more
Yield Strength (Mpa) 380 
Elongation (%) 25 
Reduction in Area (%) 55 
Hardness (HRB) 93  25  annealed more
Impact Strength (J)
(Charpy V-notch)
12  25  oil quenched from 845°C, single tempered at 315°C  more

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 11.3  20-100 more  
Glossary
Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

CNC Machining Design Guide

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

STEM Career Outlook

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