1) Grade: 50CrVA,SUP10,G61500,H51500,50CrV4,51CrV4,735A51,50CV4

2) Standard: JIS G4801:2005 / GB/T 1222-2007

3) Size: Thickness 6-32.7 Width 60-154 Length 2-8m, or as your requirements

4) Surface: Smooth Plain, Double Grooved

5) Heat Treatment: Quenching and Tempering

13) Chemical Composition: C 0.46-0.54; Si 0.17-0.37; Mn 0.50-0.80; Cr 0.80-1.10; 

                                                 V 0.10-0.20; Ni≤0.35; Cu≤0.25; P≤0.035; S≤0.035

14) Metallographic Structure: Tempering Troostite

Nominal Diameter or Thickness (mm)	The total depth of decarburization layer on each side (Not More Than)
≤8mm	23
>8mm	18

17) Production Line: Short stress tandem rolling line

19) Package Details: In bundles and standard export packing, covered by PP paper 

       outside;or according to your requirement. 

The product is a kind of advanced spring steel which has fine mechanical and  processing properties. It is suitable for important high-load springs with larger sections, valve springs with the working temperature under 300°C, piston springs, safety valve spring and etc. It can also be used for other important hardening ang tempering elements in the

non-corrosive medias under the working temperature of 400°C.

We are a large-scale manufacturer for spring steel bar in Daqiuzhuang Tianjin,  which is one of the largest steel  production base in China. The spring flat steel  we produce has the character of high quality and competitive price.According to customers' requirements, we can produce nonstandard customized sizes of width, lenght and thickness.

With excellent quality, reasonable price and good after-sales service,Daqiang spring flat steel has been sold to most provinces at home and abroad. We have established long and stable cooperation with many big company, such as China National Heavy Duty Truck Group Co., LTD(CNHTC), Shandong Wuzheng(Group) Co., LTD and etc.