carbon-steel 12L14 Product Guide from Online Metals

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Overview

12L14 is a standard resulfurized and rephosphorized carbon steel. Lead is also added in order to increase machinability, and it also means it can be bent, riveted, or crimped. However, this extra ductility and machinability do mean that 12L14 is slightly weaker than comparable carbon steel alloys. It is typically used in high-speed screw machine products and other high-speed machines.

Common Trade Names

UNS G12144, AISI 12L14, Free-Machining Steel, Ledloy™

Other Resources

Products

Applications

High-Speed Screw Machines

Specifications

ASTM
A108

	Cold Drawn/Finish
Physical Properties 12L14
Density	0.284 lb/in3
Ultimate Tensile Strength	78.3 ksi
Yield Tensile Strength	60.2 ksi
Shear Modulus	11,600 ksi
Shear Strength	53 ksi
Hardness Rockwell \| Brinell	B84 \| 163
Elongation at Break Percentage	10%
Reduction of Area	35%
Modulus of Elasticity	29,000 ksi
Poisson's Ratio	0.29
Machinability Percentage	160%
Melting Point	2,580-2,650 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	360 BTU-in/hr-ft^2-°F
Electrical Conductivity	7.1% IACS

Chemistry Information
Element	Percentage
C	0.15 max
Fe	97.91 - 98.7
Mn	0.85 - 1.15
P	0.04 - 0.09
Pb	0.15 - 0.35
S	0.26 - 0.35

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