4140 Prehard Alloy Q&T 1", 1.00 dia. 6" long ***Qty. 2***Great Price***

Description

4140 Alloy prehard.   Quench & Tempered to 28/30 RC.
Diameter. 1.0"
Length. 6"
Quantity. 2
4140 HR Q&T (prehard)
stocks 4140 Q&T -a steel in the family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, CrMo, CRMO, CR-MOLY, and similar). They have an excellent strength to weight ratio and are considerably stronger and harder than standard 1020 steel, but are not easily welded (need pre and post weld thermal treatment to avoid cold cracking). While these grades of steel do contain chromium, it is not in great enough quantities to provide the corrosion resistance found in stainless steel. The Quenching process hardens the steel, while the Tempering process restores some of the ductility and removes some of the brittleness acquired during heat treating.
Properties
The physical properties of 4140 Q&T greatly depend on the Heat Treating/Tempering processes that have been done to the material.
Typical Uses
Typical uses for 4140 include:
Jigs
Fixtures
Drill Collars
bolts
Stubs
Couplings
Axles
Shafting
Piston rods
Rams
Gears