1045 HR Special & Commercial Quality

1045hrspecial.jpg

PACIFIC 1045 is a medium carbon steel and therefore has higher strength than 1018. 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 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