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AISI 1040
Category Steel
Class Carbon steel
Type Standard
Designations  Germany: DIN 1.1186
Japan: JIS S 4O C
United Kingdom: B.S. 080 A 40 , B.S. 2 S 93
United States: ASTM A108 , ASTM A29 , ASTM A510 , ASTM A519 , ASTM A546 , ASTM A576 , ASTM A682 , MIL SPEC MIL-S-11310 (CS1040) , SAE J403 , SAE J412 , SAE J414 , UNS G10400

Composition
ElementWeight %
C  0.37-0.44 
Mn  0.60-0.90 
P  0.04 (max) 
S  0.05 (max) 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.845 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 518.8  25  annealed at 790°C  more
Yield Strength (Mpa) 353.4 
Elongation (%) 30.2 
Reduction in Area (%) 57.2 
Hardness (HB) 149  25  annealed at 790°C more
Impact Strength (J)
(Izod)
44.3  25  annealed at 790°C  more

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 13.6  20-1000 more annealed 

Electric Properties
Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 171  20 more  
Glossary
Selecting the Right 3D Printer

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

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.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.