①用国际化学元素符号和本国的符号来表示化学成份，用阿拉伯字母来表示成份含量： 如：中国、俄国 12CrNi3A ②用固定位数数字来表示钢类系列或数字；如：美国、日本、300系、400系、200系； ③用拉丁字母和顺序组成序号，只表示用途。
(1) International chemical element symbols and national symbols are used to represent chemical composition, and Arabic letters are used to express component content: for example, 12CrNi3A of China and Russia; for steel series or numbers, fixed digit numbers are used; for example, the United States, Japan, 300 series, 400 series and 200 series; and for Latin letters and sequences, serial numbers are used only for purposes.
编号规则
Numbering rules
①采用元素符号 ②用途、汉语拼音，平炉钢：P、 沸腾钢：F、 镇静钢：B、甲类钢：A、T8：特8、 GCr15：滚珠合结钢、弹簧钢，如：20CrMnTi 60SiMn、（用万分之几表示C含量）不锈钢、合金工具钢（用千分之几表示C含量），如：1Cr18Ni9 千分之一（即 0.1%C）,不锈 C≤0.08% 如0Cr18Ni9,超低碳C≤0.03% 如0Cr17Ni13Mo
(1) Use of element symbols, Chinese Pinyin, open-hearth steel: P, boiling steel: F, killed steel: B, Class A steel: A, T8: Te 8, GCr15: ball bonded steel, spring steel, such as: 20CrMnTi 60SiMn, (expressed in tens of thousands of parts C content) stainless steel, alloy tool steel (expressed in thousands of parts C content), such as: 1Cr18Ni9 (that is 0.1% C), stainless C < 0.08%. For example, 0Cr18Ni9, ultra-low carbon C < 0.03%, such as 0Cr17Ni13Mo
分类和分级
Classification and classification
4-1分级分类： ①国家标准GB ②行业标准YB ③地方标准 ④企业标准Q/CB 4-2 分类： ①产品标准 ②包装标准 ③方法标准 ④基础标准 4-3 标准水平（分三级）： Y级：国际先进水平 I级：国际一般水平 H级：国内先进水平 4-4国标 GB1220-84 不锈棒材（I级） GB4241-84 不锈焊接盘园（H级） GB4356-84 不锈焊接盘园（I级） GB1270-80 不锈管材（I级） GB12771-91 不锈焊管（Y级） GB3280-84 不锈冷板（I级） GB4237-84 不锈热板（I级） GB4239-91 不锈冷带（I级）

4-1 Classification: National Standard GB, Industry Standard YB, Local Standard, Enterprise Standard Q/CB 4-2 Classification: Product Standard, Packaging Standard, Method Standard, Basic Standard 4-3 Standard Level (Grade 3): Y Level: International Advanced Level I: International General Level H Level: www.biansongqi.org.cnwww.shidiaopailou.com.cnwww.shilangan.net.cnwww.shidiaoshizi.net.cn

www.shidiaopaifang.cnwww.shidiaoniu.cnDomestic Advanced Level 4-4 National Standard GB1220-84 Stainless Bar (Grade I) GB4241-84 Stainless Welding Stainless Welded Panyuan (Grade H) GB4356-84 Stainless Welded Panyuan (Grade I) GB1270-80 Stainless Pipe (Grade I) GB12771-91 Stainless Welded Pipe (Grade Y) GB3280-84 Stainless Cold Plate (Grade I) GB4237-84 Stainless Hot Plate (Grade I) GB4239-91 Stainless Cold Strip (Grade I)