1. Scope
This standard specifies the technical conditions of carbon structure steel, including denotation, size, shape, weight and allowable deviation, specifications, testing methods, testing rules, packaging, marks and quality certificates.
This standard is applicable to general structural steel and hot-rolled steel plates, steel strip, formed steel and bar steel for works. The product can be used for weld, binding and bolting member. They are generally used under supply state.
The chemical compositions prescribed herein are applicable to steel ingot, continuous casting billet, steel billet and its products.
2. Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the normative document referred to applies.
GB/T 222-2006 Permissible variation of chemical composition for steel
GB 223.3 Method of chemical analysis on steel and alloy - the diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content
GB/T 223.10 Method of chemical analysis on steel and alloy - the cupferron separation-chrome azurol S photometric method for the determination of aluminium content
GB/T 223.11 Method of chemical analysis on steel and alloy - the ammonium persulfate oxidation volumetric method for the determination of chromium content
GB/T 223.18 Method of chemical analysis on steel and alloy - the sodium thiosulfate separation iodimetric method for the determination of cupper content
GB/T 223.19 Method of chemical analysis on steel and alloy - the neocuproine-chloroform extraction photometric method for the determination of copper content
GB/T 223.24 Method of chemical analysis on steel and alloy - the dimethylglyoxime spectrophotometric method for the determination of nickel content
GB/T 223.32 Method of chemical analysis on steel and alloy - the hypophosphite reduction-iodimetric method for the determination of arsenic content
GB/T 223.37 Method of chemical analysis on steel and alloy - the indophenol blue photometric method for the determination of nitrogen content after distillation
GB/T 223.58 Method of chemical analysis on steel and alloy - the extraction-absorption catalytic polarographic method for the determination of manganese content
GB/T 223.59 Method of chemical analysis on steel and alloy /the sodium arsenite-sodium nitrite titrimetric method for the determination of phosphorus content
GB/T 223.60 Method of chemical analysis on steel and alloy - the perchloric acid dehydration for the determination of silicon content
GB/T 223.63 Method of chemical analysis on steel and alloy - the sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.64 Method of chemical analysis on steel and alloy - the flame atomic absorption spectrometric method for the determination of manganese content
GB/T 223.68 Method of chemical analysis on steel and alloy - the combustion potassium iodate volumetric method for the determination of sulfur content
GB/T 223.71 Method of chemical analysis on steel and alloy - the gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.72 Method of chemical analysis on steel and alloy - the alumina chromatographic separation-barium sulfate gravimetric method for the determination of sulphur content
GB/T 228 Metallic materials - Tensile testing method in room temperature (GB/T228-2002, eqv ISO 6892:1998)
GB/T 229 Metallic materials - Charpy impact test (GB/T 229-2002, eqv ISO 83:1976, eqv ISO148:1983)
GB/T 232 Metallic materials- Bend testing methods (GB/T 232-1999, eqv ISO 7438:1985)
GB/T 247 General rule of acceptance, package, mark and certification for steel plates (sheets) and strips
GB/T 2101 General rule of acceptance, package, mark and certification for profile steel
GB/T 2975 Rules for sampling in mechanical and technological testing of steel products
GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284: 1996, IDT)
碳素结构钢
1 范围
本标准规定了碳素结构钢的牌号、尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志和质量证明书。
本标准适用于一般以交货状态使用，通常用于焊接、铆接、栓接工程结构用热轧钢板、钢带、型钢和钢棒。
本标准规定的化学成分也适用于钢锭、连铸坯、钢坯及其制品。
2 规范性引用文件
下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改单（不包括勘误的内容）或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。
GB／T 222-2006 钢的成品化学成分允许偏差
GB／T 223.3 钢铁及合金化学分析方法 二安替比林甲烷磷钼酸重量法测定磷量
GB／T 223.10 钢铁及合金化学分析方法 铜铁试剂分离-铬天青S光度法测定铝含量
GB／T 223.11 钢铁及合金化学分析方法 过硫酸铵氧化容量法测定铬量
GB／T 223.18 钢铁及合金化学分析方法 硫代硫酸钠分离-碘量法测定铜量
GB／T 223.19钢铁及合金化学分析方法 新亚铜灵-三氯甲烷萃取光度法测定铜量
GB／T 223.24钢铁及合金化学分析方法 萃取分离-丁二酮肟分光光度法测定镍量
GB／T 223.32 钢铁及合金化学分析方法 次磷酸纳还原-碘量法测定砷含量
GB／T 223.37钢铁及合金化学分析方法 蒸馏分离-靛酚蓝光度法测定氮量
GB／T 223.58钢铁及合金化学分析方法 亚砷酸钠-亚硝酸钠滴定法测定锰量
GB／T 223.59 钢铁及合金化学分析方法 锑磷钼蓝光度法测定磷量
GB／T 223.60 钢铁及合金化学分析方法 高氯酸脱水重量法测定硅含量
GB／T 223.63钢铁及合金化学分析方法 高碘酸钠（钾）光度法测定锰量
GB／T 223.64钢铁及合金化学分析方法 火焰原子吸收光谱法测定锰量
GB／T 223.68 钢铁及合金化学分析方法 管式炉内燃烧后碘酸钾滴定法测定硫含量
GB／T 223.71 钢铁及合金化学分析方法 管式炉内燃烧后重量法测定碳含量
GB／T 223.72 钢铁及合金化学分析方法 氧化铝色层分离一硫酸钡重量法测定硫量
GB／T 228 金属材料室温拉伸试验方法（GB／T 228-2002，eqv ISO 6892：1998）
GB／T 229 金属夏比缺口冲击试验方法（GB／T 229—1994，eqv ISO 83：1976，eqv ISO 148：1983）
GB／T 232 金属材料弯曲试验方法（GB／T 232-1999，eqv ISO 7438：1985）
GB／T 247 钢板和钢带检验、包装、标志及质量证明书的一般规定
GB／T 2101 型钢验收、包装、标志及质量证明书的一般规定
GB／T 2975 钢及钢产品 力学性能试验取样位置及试样制备（GB／T 2975-1998，eqv’ISO 377：1997）
GB／T 4336碳素钢和中低合金钢 火花源原子发射光谱分析方法（常规法）
GB／T 20066 钢和铁化学成分测定用试样的取样和制样方法（GB／T 20066-2006，ISO 14284：1996，IDT）
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