Standard Parts On The Market There Are Three Kinds Of Carbon Steel, Stainless Steel, Copper Materials
A carbon steel. We distinguish the content of carbon in carbon steel-carbon steel, medium carbon steel and high carbon steel and alloy steel.
Low carbon steel C% 1 ≤ 0.25% commonly referred to as A3 steel in China. Abroad are called 1008,1015,1018,1022. Mainly for magnitude 4.8 bolts and 4 nuts, screws, and no hardness requirements of the product. (Note: drilling screws 1022 for main material. ）
2 medium carbon steel 0.25%
3 high carbon steel C%>0.45%. Currently on the market do not use
4 alloy: adding alloying elements in carbon steel, increased steel special properties: such as 35 or 40 chromium-molybdenum, SCM435,10B38. Michio screw main SCM435 chromium-molybdenum alloy, main component of c, Si, Mn, p, s, Cr, Mo.
Two stainless steel. Performance level: 45,50,60,70,80
1 primary austenite (18%Cr, and 8%Ni), good heat resistance, good corrosion resistance, good weldability. A1,A2,A4
2 martensite, 13%Cr poor corrosion resistance, high strength, good resistance to abrasion. C1,C2,C4 ferritic stainless steel. 18%Cr forging good corrosion resistance in martensite. Imported materials on the market are mainly Japan products. By level-main SUS302 and SUS304, SUS316.
Three copper. Common materials for the brass ... Copper-zinc alloys. Market mainly H62, H65, H68 brass fasteners.