China Cold Finished Bright Square Hexgonal Flat Section Steel Bar

Cold finished bright square/hexgonal/flat/section steel bar
SAE1018 SS400 cold draw bright hexgonal steel
Brife introduction of cold finished/cold drawn steel
Raw Material: Hot rolled steel bar or rod coils are used as raw material. Because the hot rolled products are produced at elevated temperatures (1700 - 2200 Deg. F. i.e. hot rolling), they generally have a rough and scaled surface and may also exhibit variations in section and size.
Cleaning: Abrasive scale (iron oxide) on the surface of the hot rolled rough stock is removed.
Coating: The surface of the bar or coil is coated with a drawing lubricant to aid cold drawing.
Drawing: In this process, the material being drawn is at room temperature (i.e. Cold-Drawn). The pointed/reduced end of the bar or coil, which is smaller than the die opening, is passed through the die where it enters a gripping device of the drawing machine. The drawing machine pulls or draws the remaining unreduced section of the bar or coil through the die. The die reduces the cross section of the original bar or coil, shapes the profile of the product and increases the length of the original product.
Finished Product: The drawn product, which is referred to as Cold Drawn or Cold Finished, exhibits a bright and/or polished finish, increased mechanical properties, improved machining characteristics and precise and uniform dimensional tolerances.
Our cold drawn steel bar main type and avaliable sizes

Round bars5mm-130mmSuqare bar6*6mm-100*100mmFlat bars3mm*20mm-50mm*100mmHex bars6mm-100mmBar FinsihePeeled, Cold Drawn, TurnedTurned & Polished, Centreless Ground

Cold drawn steel bar tolerance

Cold drawn steel bar main grade intrduction

Low Carbon - Case Hardening
1215,12L14,SAE1018, 1020,A36,SS400 mild steel -- A low carbon steel with a medium manganese content. Has good hardening properties, fair machinability. Readily grazed and welded. Suitable for shafting and for applications that do not require the greater strength of high carbon and alloy steels. Conforms to ASTM A-108 and AMS 5069.
Medium Carbon - Direct Hardening
SAE1040, 1045,1035 carbon steel-- Medium carbon steels used when greater strength and hardness is desired in the as-rolled condition. Can be hammer forged and responds to heat treatment. Suitable for flame and induction hardening. Uses include gears, shafts, axles, bolts and studs, machine parts, etc.
Packaging:5-layer anti-rust&strong packaging,anti-rust oil+plastic wrap+woven bag+plastic wrap+Lifting belt
Inspection: Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,UT test
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