Carbon	0.7 - 0.8
Manganese	0.4 - 0.7
Phosphorus	0.04 max
Sulphur	0.05 max

Principal Design Features		This is one of the higher carbon steels used for high hardness in the fully hardened condition. In such condition the steel is more brittle than the lower carbon steels.

Applications		Applications include springs and cutting tools.

Machinability		The machinability of this steel suffers because of the high carbon content. It rates at 50% that of the 1112 steel that is considered the 100% machinable base reference.

Forming		Forming is difficult but may be done by conventional methods.

Welding		1075 is weldable by all of the welding techniques. However it is important to use pre-heat and post-heat practice as given in approved weld procedure, in order to avoid cracking. Pre-heat at 500 to 600 F and post-heat at 1200 to 1450 F.

Heat Treatment		This steel may be hardened by heating to 1650 F and oil quenching followed by a tempering treatment.

Forging		Forge at 2200 F down to 1700 F. It is important to do an annealing operation after forging.

Hot Working		Hot work at 900 to 200 F.

Cold Working		Cold working of 1075 is difficult even in the annealed condition. However it may be done by conventional methods but requires more force than for the low carbon steels.

Annealing		Anneal at 1700 F and slow furnace cool.

Aging		Not applicable.

Tempering		Temper, after heating and quenching, at 700 to 1300 F. However this steel is most often used in the fully hardened condition (not tempered) of Rockwell C 55 or so.

Hardening		Hardens by cold working and heating and quenching.

Physical Data : [top]

Density (lb / cu. in.)	0.284
Specific Gravity	7.86
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.107
Melting Point (Deg F)	2760
Poissons Ratio	0.3
Thermal Conductivity	360
Mean Coeff Thermal Expansion	6.7
Modulus of Elasticity Tension	30
Modulus of Elasticity Torsion	11

There is no Mechnical data available for this grade.

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