Properties of Cold Rolled Steel 1144

Written by james croxon
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Properties of Cold Rolled Steel 1144
1144 steel is typically formed as a cold rolled product. (Hemera Technologies/ Images)

American Iron and Steel Institute grade 1144 steel is a medium carbon steel most commonly manufactured in the cold rolling process. Also referred to as a stress-proof steel, 1144 has excellent strength, wear and hardness properties. Like other medium carbon steels 1144 can be hardened and heat treated after shaping.

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Chemical Properties

American Iron and Steel Institute 1144, like all steels, is primarily composed of iron. It also contains carbon, four-tenths to .48 per cent, manganese, 1.35 to 1.65 per cent, phosphorous, less than .04 per cent and sulphur, .24 to .33 per cent. The relatively high carbon and manganese properties give the steel added strength and toughness.

Physical Properties

Cold rolled 1144 has a density of 7.87 grams per cubic centimetre or .129 Kilogram per cubic inch. It has a shear modulus of 80 GPa or 11,600 ksi. The steel has a Poissons ration of .290, which is typical for most steels.

Hardness and Toughness

The 1144 steel has a Brinell hardness of 212 in its cold rolled form from the mill. Other measurements of its hardness are a 235 Knoop hardness, 94 on the Rockwell B scale, 16.0 on the Rockwell C scale and 223 on the Vickers hardness scale. It has an ultimate tensile strength of 705 MPa, a tensile strength of 420 MPa and an elongation of 21 per cent before breaking.

Other Properties

Other properties for cold rolled 1144 include a .0000170 ohm centimetres electrical resistivity and a specific heat of .472 Joules per gram degree Celsius. It also has a 51.9 Watts per meter degree Kelvin.

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