Metal Alloys
Alloy Home
Steels
Alloy Steels
General Information
Properties
Classification
Standard
H-Steels
HSLA
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
Resources
Bibliography
Injection Molding Design Guide

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

CNC Machining Design Guide

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

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.

more free publications
 
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

Composition

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)
(Izod)
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 
Glossary
Injection Molding Design Guide

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

CNC Machining Design Guide

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

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.