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ASTM HM21A-T8
Category Magnesium Alloy

Composition
ElementWeight %
Al  3.30 
Mn  0.60 
Th  2.00 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 1.78 25  
Poisson's Ratio 0.35 25  
Elastic Modulus (GPa) 44.8 25  
Tensile Strength (Mpa) 235.0  25  T8 (sheet, plate) 
Yield Strength (Mpa) 170.0 (130.0) 
Elongation (%) 11.0 
Reduction in Area (%)  
Note: Value in parentheses indicates yield strength for compression.
Shear Strength (MPa) 125  25  T8 (sheet, plate) 

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Conductivity (W/m-K) 138.07  0  T8 
Glossary
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.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

STEM Career Outlook

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