9. Alloy tool steel and high speed tool steel alloy tool steel ① steel average carbon content is ≥1.0%, the carbon content is not marked; when the average carbon content of <1.0%, to a few thousandths. For example Cr12, CrWMn, 9SiCr, 3Cr2W8V. ② steel alloying element content representation, basically the same as alloy structural steel. But for low chromium steel alloy tool steel, the chromium content of a few thousandths and express digital content before the "0" Heze Japanese standard stainless steel screws to put it and the general element content by percentage Methods few that are distinguished. For example Cr06. ③ high-speed steel, tool steel carbon content is generally not marked, marked only a few percent of the average content of various alloying elements. Such as steel, tungsten high speed steel is expressed as "W18Cr4V". Steel numbers preceded by the letter "C" who indicated that their carbon content higher than the highest "C" common steel. Stainless steel screws, stainless steel screws 316 stainless steel bolts Liaocheng Japanese standard screws, stainless steel rivets, stainless steel rivet nut. SJ 2502-1984 fastener Cross recessed pan head self-tapping screw the common thread fasteners SJ 2503-1984 Cross recessed countersunk head self-tapping screw the common thread fasteners SJ 2504-1984 Cross recessed oval head tapping screw SJ common thread 2505-1984 fastener cylindrical head screws with waisted swim nut fastener SJ 2506-1984 SJ 2507-1984 round nut fastener riveted fastener SJ 2508-1984 light special flat hexagonal nut fine tooth SJ 2509-1984 Fasteners riveting nut side SJ 2510-1984 fastener handle 304 stainless steel screws washers stainless steel screws Yantai Japanese standard screws, socket head cap screws inside the 316 stainless steel, 304 stainless steel adapter, 304 slot screws stainless day standard screws, stainless steel welding screws 316 stainless steel screws, 316 stainless steel blind rivets, stainless steel cotter pin Liaocheng stainless Japanese standard screws | Jinan Road ground (certified) | stainless steel screws JIS provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) Shandong Jinan, hardware accessories leader over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Daoqin better future.