Standard: JIS
● Features Application:
SUSXM7 stainless steel, austenitic stainless steel SUS series in Japan. Features: add copper in 304; improved cold workability. SUSXM7 used for cold heading and other parts.
SUSXM7 GB 0Cr18Ni9Cu3, low carbon, low nitrogen, sulfur, the deformation of steel for the 304, the higher copper content, easy to shape, generally used for hex, coach screws, self tapping screws and other products with a higher degree of deformation. It 302HQ similar in chemical composition specification, due to the price, which is based on the identity of alternative 302HQ there, but in actual use, there are still differences, you pay for, mainly in the stronger magnetic than the real 302HQ processing performance, large differences in terms of small diameter, such as the processing of glasses when best to use a small screw Nippon 302HQ real materials. Of course, if the requirements are not very stringent, XM7 is a good choice. SUSXM7 and SUS302HQ main difference between the chemical composition of some trace elements, while the main component of stainless steel wire from the point of view, their specification is very similar, basically no difference. However, in actual use, in the processing performance is magnetic and can be a judge, but this requires experience, determine if you want to clear, it is best to do material testing. Because the main component of almost XM7 with 302HQ, many manufacturers will XM7 also known as 302HQ.
● Chemical composition:
     Carbon C: ≤ 0.08
     Manganese Mn: ≤ 2.00
     Ni-Ni: 8.50 ~ 10.50
     Si Si: ≤ 1.00
     Phosphorus P: ≤ 0.045
     Sulfur S: ≤ 0.030
     Chromium Cr: 17.00 ~ 19.00
     Cu Cu: 3.00 ~ 4.00
● Mechanical Properties:
     Yield strength (N/mm2): ≧ 155
     Tensile strength (N/mm2): ≧ 450
     Elongation EL (%): ≧ 40
           HB: ≦ 187