4140 ht steel round bar

4140 ht steel round bar

4140 steel material is called in American and Australian standard such as aisi 4140, astm 4140, sae 4140, as 4140. It is one kind of Chromium-Molybdenum through-hardening steel of medium hardenability. It is a general purpose high-tensile steel with medium strength level and good impact properties. The equivalent materials are 42CrMo, SCM440, 42CrMo4 but there is little different in Mn content. The 4140 material Mn content is 0.75%-1.00%, other material Mn content is usually 0.60% - 0.90%. But this material is usually used after quenching and tempering, after the heat treatment, the mechanical properties can be same in these standard.

4140 pht steel is that 4140 steel bar will be pre heat treated before used to produce components, shafts etc. 4140 pht steel bar will be used directly by machining such as threading, cnc machining etc.

As a factory, we can do cold drawing, peeling, centerless grinding and polished and also all kinds of heat treatment. So except the 4140 hot rolled Alloy Steel Round Bar, we can also supply 4140 cold drawn alloy steel round bar, 4140 peeled alloy steel round bar, 4140 ground and polished Steel Bright Bar, 4140 Annealed Steel Bar, 4140 Normalized Steel Bar and 4140 Quenched And Tempered Steel Bar ( 4140 qt steel bar , 4140 Q&T steel bar ).  

4140 peeled or turned teel bar peeling or turning is a kind of machining used to remove the imperfections on the hot rolled bars surface. It can also get more precision diameter tolerance and bright surface after peeling or turning. If grinding or polishing is added, the steel bars will be have very good surface roughness which can be directly used to produce components. 4140 turned, ground and polished precision shafting is produce by 4140 cold drawn or hot roll steel bar to get precision dimension and better straightness in the production of shafts. The straightness is quite important to shafting CNC machining. 4140 turned ground and polished steel bar is used to produce crankshafts, high-speed motor shafts, axle shafts, pup shafts, etc.

4140 turned ground and polished steel bar we supply includes following advantages:

Consistent mechanical properties

Deep mechanical properties (from surface to the center according to your requirement)

Even hardness on the whole bars/Tougher and Increased strength

No brittle, UT testing/Precision size tolerance/Good straightness

Good Roughness/Professional technical service/Competitive price/Fast delivery

Specification of 4140 cold drawn steel bar we supply:

1. 4140 steel equivalent material:

2. 4140 steel chemical composition:

 3. 4140 steel mechanical properties:

4. 4140 steel applications:

high strength stud bolt, Threaded Rods, wind power bolt, prestressed anchor bolts, post stressed anchor bolt, Steel Tie Rod, tie bar, tension rod, Tension Bar etc. Shaft, axle shaft, crankshaft, shaft for sleeve, linear shaft, pump shaft, rotor shaft, sensor shaft, spline shaft, drive shaft, mandrel shaft, transmission shaft, screw rod etc. CNC machines, precision CNC machines etc. Ejector pins and Ejector rods