鈼? alloy steel, spring steel, such as: 20CrMnTi 60SiMn, (with a very few that C content)

鈼? stainless steel elbow, alloy tool steel (with a few thousandths that C content), such as: 1Cr18Ni9 per thousand (0.1% C), stainless steel C ≤ 0.08% such as 0Cr18Ni9, ultra-low carbon C ≤ 0.03% 00Cr17Ni13Mo

International Stainless Steel Marking Method The American Iron and Steel Institute uses three digits to mark various grades of malleable stainless steel. among them:

鈶? austenitic stainless steel with 200 and 300 series of figures, for example, some of the more common austenitic stainless steel is 201, 304, 316 and 310 for the mark.

鈶? ferrite and martensitic stainless steel with 400 series of digital representation.

鈶? ferritic stainless steel is 430 and 446 for the mark, martensitic stainless steel is 410,420 and 440C for the mark, biphasic (austenite - ferrite),

鈶? stainless steel, precipitation hardening stainless steel and iron content of less than 50% of the high alloy is usually the use of the patent title or trademark name.

4). Classification and classification of specifications

4-1 Classification: 鈶? national standard GB 鈶? industry standard YB 鈶? central specification 鈶? enterprise standard Q / CB

4-2 Classification: 鈶? product specification 鈶? packaging specifications 鈶? approach specifications 鈶? basic norms

4-3 Degree of standardization (in three levels): Grade Y: International advanced level Class I: International general level H: Domestic advanced degree

4-4 national standard

GB1220-84 stainless steel elbow (I level) GB4241-84 stainless steel welding Park (H)

GB4356-84 stainless steel welded plate garden (Class I) GB1270-80 stainless steel pipe (Class I)

GB12771-91 stainless steel pipe (Y level) GB3280-84 stainless steel cold plate (Class I)

GB4237-84 stainless steel elbow pipe fittings (Class I) GB4239-91 stainless steel cold zone (Class I)