Use of Products: SWRCH20K-50K,which have the characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality,are commen steel grade for manufacturing fasteners of class 6.8 to 10.9. After spheroidize annealing, this product has characteristics of good cold heading properties ,stable heat-treatment properties, good hardenability and applied in the fields of automobile and mechanic and so on.SWRCH35K won the gold-cup award of metallurgical products' quality in 2007。And the development of wire rod of SWRCH35K was granted the second class award of scientific and technological improvement by Xingtai city。The product of SWRCH35K , which has been used satisfactorily by some famous consumer, is very popular among the regions of Zhejiang, Jiangsu,Guangdong,Shangdong province, Tianjin,Chongqing,Shanghai city and northeast China.