1018 HR Special Bar Quality

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PACIFIC 1018 is the standard analysis for low carbon machinery steels and is best known for use in "cold rolled" bars. PACIFIC's hot rolled 1018 offers consistent machinability with good weldability. The special quality 1018 meets ASTM A576 special bar requirements and is vacuum degassed, calcium treated and ultrasonic tested for soundness. These bars are rough turned oversize to finish at nominal size for economical machining. This grade can be surface hardened by carburizing but does not respond to through hardening heat treatment.

Chemical Composition

Heat Analysis - ranges and limits %

C

.15/.20

Mn

.60/.90

P

.040 Max

S

.050 Max

Typical Properties

Approximate - not specification

Tensile (psi)

65,000

Yield (psi)

42,000

Elongation

35%

Hardness

137 HB

Machinability

55%

Processing Temperatures

Typical

Forge

2300°F Max

Normalize

1625/1725°F

Case Harden

1500/1700°F

Shapes and Conditions Available
  • Rough Turned Oversize Rounds