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)