Metal Alloys
Alloy Home
Alloy Steels
General Information
Alloy Steel List
AISI 1xxx
AISI 2xxx
AISI 3xxx
AISI 4xxx
AISI 5xxx
AISI 6xxx
AISI 8xxx
AISI 9xxx
* For other AISI or Non-AISI, please use the search function above or check Grades.
ASTM Steels
Specific Alloy Steel
General Information
Metal 3D Printing Design Guide

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

3D Scanners

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

Chemical Engineering

The industry gateway for chemical engineering and plant operations.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

more free magazines
AISI 3140
Category Steel
Class Alloy steel
Type Standard
Common Names Nickel-chromium steel
Designations  Germany: DIN 1.5711
United Kingdom: B.S. 640 M 40
United States: ASTM A322 , ASTM A331 , ASTM A519 , ASTM A711 , MIL SPEC MIL-S-16974 , SAE J776 , UNS G31400


ElementWeight %
C  0.40-0.50 
Mn  0.50-0.80 
Cr  0.45-0.75 
Ni  1.00-1.50 

Mechanical Properties

Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 689.5  25  annealed at 815°C  more
Yield Strength (Mpa) 422.6 
Elongation (%) 24.5 
Reduction in Area (%) 50.8 
Hardness (HB) 197  25  annealed at 815°C more
Impact Strength (J)
46.4  25  annealed at 815°C  more

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 11.8  0-100 more hardened and tempered