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Wuxi Tianchen Cold-Drawn Steel Co., Ltd.

Flat Steel Bar

Tianchen cold-drawn flat steel bars offer superior precision and performance for diverse industrial applications. Produced via a rigorous process of heat treatment, shot blasting, and cold drawing with tungsten carbide dies, our flat bars feature tight dimensional tolerances, excellent straightness, and a smooth, clean surface finish. Supplied in a variety of steel grades such as 45#, 40Cr, and Q235, we provide flat bars in a wide range of widths and thicknesses to meet your customized specifications. Ideal for construction frameworks, machinery components, agricultural equipment, and general engineering applications, our flat bars effectively reduce material waste and lower secondary processing costs. We support flexible order quantities and ensure reliable delivery to customers across Europe, Southeast Asia, and worldwide. Choose Tianchen as your dependable supply partner for consistent quality and competitive pricing.

Tianchen Steel Grade Cross-Reference Table

Type of steelENASTMJISGB
Carbon steel / Low alloy steelS185(1.0035)、S235JR(1.0038)、E335(1.0060)……Grade B、Grade D、Grade 50……SS330、SS400、SS490……Q195、Q235、Q345……
Quality carbon steelC22(1.0402)、C35(1.0501)、C45(1.0503)……1020、1035、1045、1022……S10C、S20C、S35C、S45C20、35、45、20Mn……
Alloy structure steel33NiCrMo14-5(1.6956)、34CrNiMo6(1.6582)、30CrNiMo8(1.65803)、51CrV4(1.8159)、42CrMo4(1.7225)、16MnCr5(1.7131)、17CrNi6-6(1.5918)、20MnCrS5(1.7149)……1524、1340、5120、5140、4118、4135、4140、3316、4340……SMn420、SMn438、SCr420、SCr440、SCM420、SCM435、SCM440、SCN815、SNCM439……20Mn2、40Cr、20CrMo、35CrMo、42CrMo、20CrMnTi、20Cr2Ni4、40CrNiMo……
Cold heading steelC10C(1.0214)、C20C(1.0411)、C35EC(1.1172)、34CrMo4(1.7220)1012、1020、1030、1035、4135、4140、1518……SWRCH10A、SWRCH22A、SWARCH35K、SCM435、SWRCHB620……ML10AL、ML20、ML30、ML35、ML35CrMo、ML15MnB……
Spring steel61SiCr7(1.7108)、51CrV4(1.8159)、54SiCr6(1.7102)……1566、9260、6150……SWRH67B、SUP6、SUP7、SUP10……65Mn、60Si2Mn、50CrVA、55CrSi……
Bearing steel100Cr6E52100SUJ2GCr15
Stainless steel1.4016、1.4105、1.4006、1.4021、1.4301……430、430F、412、420、304……SUS430、SUS430F、SUS410、SUS420、SUS304……1Cr17、Y1Cr17、1Cr13、2Cr13、304……
Tooling steelC80U、C90U、C105U……W1A-8、W1A-81/2、W1A-91/2……SK80、SK90、SK105……T8、T9、T10……
Free cutting steel10S20(1.0726)、10SPb20(1.0722)、11SMn30(1.0715)、11SMnPb30(1.0718)、38SMn28(1.0760)……1112、11L08、1215、1213、12L14、1141……SUM21、SUM32、SUM22L、SUM42……Y12、Y12Pb、Y15、Y15Pb、Y40Mn……


Main Parameters of  Flat Steel Bar

ShapeSpecifications (mm)Roughness Ra (µm)Length (m)
Square Steel4×4 – 90×90≤1.62.5–8.0, Customizable
Flat Steel3×8 – 10×120≤1.62.5–8.0, Customizable
Hexagon SteelS6 – S75≤1.62.5–8.0, Customizable
RemarkCustomizable Cold-Drawn Profiles / Shaped Steel Wire

Product Accuracy Grades and Tolerances

Size (mm)h9h10h11
>3-60, -0.0300, -0.0480, -0.075
>6-100, -0.0360, -0.0580, -0.090
>10-180, -0.0430, -0.0700, -0.110
>18-300, -0.0520, -0.0840, -0.130
>30-500, -0.0620, -0.1000, -0.160
>50-800, -0.0740, -0.1200, -0.190


Application of Flat Steel Bar

steel for intelligent devices
steel for intelligent devices
steel for cars
steel for cars
steel for green building
steel for green building
stainless steel for marine use
stainless steel for marine use
steel for intelligent robot
steel for intelligent robot
steel for electrical tools
steel for electrical tools
rail steel
rail steel
steel for guide rail
steel for guide rail
steel for electric power equipment
steel for electric power equipment
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