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Super Acralloy® E-4340 TG & P

HOT ROLLED & COLD FINISHED

PACIFIC ACRALLOY® has satisfied the high strength precision shafting requirements of the Pacific Northwest for decades. Acralloy® is drawn or turned then heat treated by quenching and tempering for high strength. It is then specially straightened, stress relieved, and ground and polished to 16 maximum rms. Acralloy® has good toughness as well as high strength and is the choice for many heavy duty shafting applications. It can be welded if properly preheated. Acralloy® can also be surface hardened by induction heat treating and by nitriding.


CHEMICAL COMPOSITION
Heat Analysis - ranges and limits %

C
.38/.45
Mn
.75/1.00
P
.035 max
S
.040 max
Cr
.80/1.10
Mo
.15/.25

TYPICAL PROPERTIES
Approximate - not for specification

Tensile (psi)
120,000
Yield (psi)
100,000
Elongation
20%
Hardness
255 HB
Machinability
55%

Shapes and Conditions Available
Ground & Polished Rounds through 5" Diameter