1144 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

Also called "stressproof"®, this alloy has excellent strength and hardness, and is specifically treated to relieve stresses in the metal created during the manufacturing process. This means that the bar is less prone to warping after it is machined or heat treated. Further, 1144 is easily machined. Typically used in nuts, bolts, arbors, gears, pinions, piston rods, sleeves, shafts, and screws. "Stressproof"® is a trademark of the LaSalle Steel Co.

Common Trade Names

UNS G11440, AISI 1144, C1144

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

Products

1144 Round Bar

Applications

Nuts & Bolts
Arbors
Gears
Sleeves
Screws

Specifications

ASTM
A311

	Cold Finish
Physical Properties 1144
Density	0.284 lb/in3
Ultimate Tensile Strength	108 ksi
Yield Tensile Strength	89.9 ksi
Shear Modulus	11,600 ksi
Shear Strength	73 ksi
Hardness Rockwell \| Brinell	B95 \| 217
Elongation at Break Percentage	10%
Reduction of Area	30%
Modulus of Elasticity	29,700 ksi
Poisson's Ratio	0.29
Machinability Percentage	83%
Melting Point	2,580-2,650 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	346 BTU-in/hr-ft^2-°F
Electrical Conductivity	7.2% IACS

Chemistry Information
Element	Percentage
Fe	97.54 - 98.01
C	0.4 - 0.48
Mn	1.35 - 1.65
P	0.04 max
S	0.24 - 0.33