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Carbon		0.14 - 0.2
Iron		Balance
Manganese		0.6 - 0.9
Phosphorus		0.04 max
Sulphur		0.05 max

Principal Design Features		1018 is among the most commonly available grades available in the world. It is widely available in cold finished rounds, squares, flat bar and hexagons. Despite its unimpressive mechanical properties, the alloy is easily formed, machined, welded and fabricated. Due to its higher Mn content, it can, in thin sections, be hardened to Rc 42.

Applications		The alloy is a free machining grade that is often employed in high volume screw machine parts applications. It is commonly employed in shafts, spindles, pins, rods, sprocket assemblies and an incredibly wide variety of component parts.

Machinability		1018 is rated at 62% of 1112 carbon steel. The alloy can be easily brought to a fine finish, its chips are continuous and hard and it can be machined in all conditions.

Forming		1018 can be easily formed in the annealed condition.

Welding		1018 has been successfully welded using most all the common practices including gas, resistance, oxyacetylene, and submerged melt welding.

Heat Treatment		1018 can, in thin sections be case hardened to Rc 42. In thicker sections, over 4", Rc 28-30 can be obtained.

Forging		Forge this alloy in the range of 1825-2300 F.

Hot Working		1018 can easily be hot worked.

Cold Working		Cold working 1018 will have a significant affect on hardness and mechanical properties. Intermediate annealing is required to overcome its tendency to work harden.

Annealing		A full anneal can be achieved by soaking at 1650 F followed by furnace cooling. Process annealing can be done at 1200 F.

Hardening		See heat treatment and cold working notes.

Physical Data : [top]

Density (lb / cu. in.)	0.283
Specific Gravity	7.82
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.116
Mean Coeff Thermal Expansion	6.7

Form		Round Bar
Condition		Annealed
Temper		68
Tensile Strength		60
Yield Strength		44
Elongation		35
Reduction of Area		67
Brinnell		127
Form		Round Bar
Condition		Hot Rolled
Temper		68
Tensile Strength		68
Yield Strength		50
Elongation		36
Reduction of Area		65
Brinnell		143
Form		Round Bar
Condition		Normalized
Temper		68
Tensile Strength		66
Yield Strength		50
Elongation		36
Reduction of Area		68
Brinnell		135