Chinese manufacturer and exporter for heat treaments spring Steel coils, Alloy steel strip, Stainless steel strip,High carbon steel strip.

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GuangZhouShiGuangWeiYouLiang Trading Co.,Ltd
Address: #602, No.12 Guang Ming Bei Rd,  ShiQiaoStreet PanYu District., Guang Zhou CHINA  PS511400
E-mail: ritamao@gdgwsteel.com 
Tel: 020-8481 5871 ext 801-806
Fax: 020-8481 5872
http: www.gdgwsteel.com

Home » FAQs » Quality & control
Quality & control
2012-05-22 05:39:31

We have highly competent, experienced and enthusiastic engineers who enable to fulfills
the customer’s concerning and expectation of providing the good quality and service
combine the reliable equipment and efficient management system
Each process from the crude material till the end product is accordance with national and international standard including chemical compositions , mechanical properties: hardness, tensile strength, elongation , yield , flatness , tolerance ,edge, polish and tempering color are always controlled strictly. Insure a hardened, tempered, & polished steel designed to meet the most exacting requirements


The spectrum device help to re-check chemical
compositions of  the crude steel material whether
deviate the customer’s requirements


The Durometer is to test the Rockwell hardness.
Our end users general acceptance hardness
scope between 40 HRC and 55 HRC after
finished tempered process


The portable durometer is easy to repeat verification
the hardness of steel strip which is flowing production
especially  efficient with too thin thickness orders


The device is to test tensile strength, elongation analysis
while producing the orders which enhanced soft under
annealed or full  annealed conditions delivery


The digital caliper as a auxiliary micrometer is to repeat
test the narrow width which final edge of steel strip
finished whether to deviate the tolerance allowance


The digital Micro master comparator is to re-check the
thickness of steel strip finial finished whether to
cross the tolerance limited by customers

The standard reference
1.For chemical composition & declination of steel(GB/T222-3-69)
2.Hot-rolled quality carbon steel strip(GB/T710-1991)
3.cold rolled quality carbon steel strip(GB3526-83)
4.Dimension,shape, weight and tolerance for hot&cold-rolled steel strip(GB/T709-2006)
5.stainless steel strip for springs(YB/T5310-2006)
6.Cold -rolled steel strip for heat treatment(YB/T5063-2007)
7.Cold-rolled steel strip for spring & tools(GB3525-83)
8.Cold-rolled steel strip for saw blade(YB/T5062-2007)
9.Cold-rolled heat treatment spring steel for shutter spring(GB3530-83&230.1-2009)

Steel strip  Alloy steel strip  Spring steel strip  Stainless steel strip  High carbon steel strip  Spheroidized steel strip  Fully annealed steel strip  Hardened and tempered steel strip      carbon steel strips

Copyright @2003-2012 GuangZhouShiGuangWeiYouLiang Trading Co.,Ltd Mail: ritamao@gdgwsteel.com  
Tel:+86208481587 Ext 801-806 Fax:+862084815872 Addess: #602, No.12 Guang Ming Bei Road, ShiQiaoStreet PanYu District, GuangZhou CHINA