4140 Annealed or Normalized

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PACIFIC Hot Rolled Steel Plate stock is available as either full plates or SE®-Bars (Saw Edge). PACIFIC introduced plate sawing to the Northwest in the 1970's and continues to lead the industry. Standard carbon and alloy steel plus quenched & tempered structural steel is made to square and flat bar sizes without a detrimental heat affected edge. This saves time and costs associated with stress relieving bars which have been flame cut. Standard SE®-Bars widths are offered in 1/4" increments through 3" wide, 1/2" increments over 3" through 6" wide and 1" increments over 6" through 12" wide; available in cut pieces to full bars. Custom widths are available to 25" wide in full bars only (approximately 12 ft.)

4140 Plate is medium carbon alloy grade which responds well to through hardening when oil quenched. It can also be flame or induction hardening. Condition is as rolled.

Chemical Composition

Heat Analysis - ranges and limits %

C

.38/.45

Mn

.75/1.00

P

.035 Max

S

.040 Max

Cr

.80/1.10

Cr

.15/.25

Typical Properties

Approximate - not specification

Tensile (psi)

120,000

Yield (psi)

100,000

Elongation

20%

Hardness

255 HB

Machinability

55%