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AISI 8740
Conditions Tensile Properties 
T (°C)Treatment
25 annealed at 815°C   Tensile Strength (MPa) 695.0 
Yield Strength (MPa) 415.8 
Elongation (%) 22.2 
Reduction in Area (%) 46.4 
25 normalized at 870°C   Tensile Strength (MPa) 929.4 
Yield Strength (MPa) 606.7 
Elongation (%) 16.0 
Reduction in Area (%) 47.9 
25 oil quenched, fine grained, tempered at 205°C   Tensile Strength (MPa) 1999 
Yield Strength (MPa) 1655 
Elongation (%) 10 
Reduction in Area (%) 41 
25 oil quenched, fine grained, tempered at 315°C   Tensile Strength (MPa) 1717 
Yield Strength (MPa) 1551 
Elongation (%) 11 
Reduction in Area (%) 46 
25 oil quenched, fine grained, tempered at 425°C   Tensile Strength (MPa) 1434 
Yield Strength (MPa) 1358 
Elongation (%) 13 
Reduction in Area (%) 50 
25 oil quenched, fine grained, tempered at 540°C   Tensile Strength (MPa) 1207 
Yield Strength (MPa) 1138 
Elongation (%) 15 
Reduction in Area (%) 55 
25 oil quenched, fine grained, tempered at 650°C   Tensile Strength (MPa) 986 
Yield Strength (MPa) 903 
Elongation (%) 20 
Reduction in Area (%) 60 
Glossary
Selecting the Right 3D Printer

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

3D Scanners

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

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.