Chemical composition
(1) Composition index: the chemical composition of stainless steel flat steel belongs to the rolled steel series for general structure, and the main inspection index is C, Mn, P, S. According to the different brand, the content is different, the approximate range is C< 0.08%, Mn: 2.0, P< 0.035%, S< 0.03%.
(2) Inspection methods: The commonly used standard inspection methods for the above chemical compositions are GB223, JISG1211-1215, BS1837, BS Manual 19, г с т 22536, etc.
The standard specifications
GB/ T2101-89 (General requirements for acceptance, Packing, Marking and Quality Certificate of section steel); Gb9787-88 / GB9788-88 (hot rolling size, shape, weight and allowable deviation); Jisg3192-94 (Shape, Size, weight and Tolerances of hot-rolled sections); DIN17100 -- 80 (quality standard for ordinary structural steel); Technical specifications of general carbon type steel EK35 -- 88.
According to the above standards, the goods should be delivered in bundles, and the bundling times and the length of the same bundle should meet the requirements. Generally delivered without packing, transportation and storage must pay attention to moisture.
Mechanical properties of
(1) Inspection method:
Tensile test method. The commonly used standard examination methods are GB/T228-87, JISZ2201, JISZ2241, ASTMA370, г с т 1497, BS18, DIN50145 and so on;
② Bending test method. The commonly used standard examination methods are GB/T232-88, JISZ2204, JISZ2248, ASTME290, г с т 14019, DIN50111 and so on.
(2) Performance indicators: The test items to evaluate performance are mainly tensile test and bending test. The index includes yield point, tensile strength, elongation and bending qualification.
weight
Weight per meter (kg) =0.00793 x Edge width (mm) x edge thickness (mm)