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1045 HR Special & Commercial Quality

HOT ROLLED & COLD FINISHED

PACIFIC 1045 is a medium carbon steel and therefore has higher strength than 1O18. It is extensively used where the higher strength and toughness of alloy grades are not required. Commercial quality is stocked in smaller diameters. Sizes 3-1/4" through 11" diameter are special quality rough turned oversize bars which have been vacuum degassed, calcium treated and ultrasonic tested for soundness. Forged bars which are rough turned oversize are stocked in large diameter sizes 12" through 18". This medium carbon grade can be through hardened in small sections and can be surface hardened by flame or induction in virtually all diameters. Welding generally requires preheating in the 400°F range.

CHEMICAL COMPOSITION
Heat Analysis - ranges and limits %

C
.43/.50
Mn
.60/.90
P
.040 MAX
S
.050 MAX

TYPICAL PROPERTIES
Approximate - not for specification

Tensile (psi)
95,000
Yield (psi)
58,000
Elongation
23%
Hardness
201 HB
Machinability
57%

PROCESSING TEMPERATURES
Typical

Forge
2275°F MAX
Normalize
1550/1650°F
Case Harden
1500/1575°F

Shapes and Conditions Available
Hot Rolled through 3" Diameter
Rough Turned Oversize from 3-1/4" through 11" Diameter
Press Forged and Rough Turned from 12" through 18" Diameter