This standard specifies the dimensions and technical requirements, acceptance rules, packaging, marking and quality certificates of patterned steel plates. This standard is applicable to hot-rolled diamond-shaped, lentil-shaped and round bean-shaped patterned steel plates of carbon structural steel, hull structural steel and high weathering resistant structural steel. GB/T 3277-1991 Patterned Steel Plate GB/T3277-1991 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
Corrugated steel plates with lath and lentilform1Subject content and scope of application
GB/T 3277-91
This standard specifies the dimensions and technical requirements, acceptance rules, packaging, marking and quality certificate of corrugated steel plates. This standard applies to hot-rolled diamond-shaped, lentil-shaped and round bean-shaped corrugated steel plates of carbon structural steel, hull structural steel and high weathering resistance structural steel.
2 Reference standards
GB222 Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB247
General provisions for acceptance, packaging, marking and quality certificate of steel plates and steel strips GB700 Carbon structural steelbZxz.net
GB709 Dimensions, shape, weight and allowable deviations of hot-rolled steel plates and steel strips GH712 Structural steel for hulls
GB1171 High weathering resistant structural steel
3 Dimensions, shape, weight and allowable deviations of steel plates 3.1 The dimensions of patterned steel plates shall comply with the following provisions; Basic thickness: 2.5 3.0.3.5 4.0, 4.5, 5.0 5.5, 6, h, 7.m. 8.0 mm. Width: 600~180(0mm. Length: 2000-12000mm, 100mm. With the cooperation of both parties, patterned steel plates or rolled patterned steel strips other than those specified in this standard can be supplied. 3.2 The allowable deviation of the length and width of the patterned steel plate shall comply with the provisions of GB709. The patterned steel plates produced by the continuous rolling mill may not be cut on the longitudinal edge. 3.3 The size, shape and distribution of the pattern are as follows: diamond patterned steel plate is shown in Figure 1; flat dot pattern is shown in Figure 2; round bean patterned steel plate is shown in Figure 3. With the agreement of both parties, patterned steel plates of other shapes can be supplied. Approved by the State Bureau of Technical Supervision on March 26, 1991 and implemented on January 1, 1991. GB/T 3277—91
cc The dimensions in the figure are for control when the manufacturing factory processes the rollers, and are not used as the basis for inspection of the finished patterned steel plate. After consultation between the two parties, patterned steel plates or patterned steel strips of other shapes can also be supplied. 3.4 The basic thickness, allowable deviation and theoretical weight of the patterned steel plate shall comply with the provisions of Table! Basic thickness
GB/T 3277—91
Basic sequence tolerance
The pattern height shall not be less than 0.2 times the base plate thickness. 3.5
The unevenness of the patterned steel plate shall comply with the provisions of GR719. 3.6
Theoretical weight, kg/m2
The patterned steel plate shall be delivered according to the actual weight or theoretical weight. 3.7
3.8Marking example: Made of Q235-A steel, the size is 4×1000×4000mm, the bean-shaped patterned steel plate is marked as bean-shaped patterned steel plate Q235-A-4×1000×4000-GB/T3277—91, Technical requirements
4.1 Brand and chemical composition
4.1. 1 The steel grades for patterned steel plates shall be supplied in accordance with the grades listed in GB700, CB712 and GB4171. With the agreement between the supply and demand parties, patterned steel plates may be produced with other grades. 4.1.2 The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of (GB222, 4.2 Mechanical properties
Mechanical properties are not guaranteed. When the demander requires, the mechanical properties and test methods shall comply with the provisions of the relevant standards or be agreed upon by both parties.
4.3 Delivery status
The steel plates are delivered in hot-rolled state.
4.4 Surface quality
4.4.1 There shall be no bubbles, scars, cracks, folds and inclusions on the surface of the patterned steel plate, and the steel plate shall not be delaminated. GB/T 8277—91
4.4.2 Surface quality is divided into two levels:
Ordinary precision: The surface of the steel plate is allowed to have a thin layer of iron oxide scale, rust, surface roughness caused by the shedding of iron oxide scale, and other local defects whose height or depth does not exceed the allowable deviation. The pattern is allowed to have inconspicuous burrs and individual marks whose height does not exceed the grain height. The maximum area of ​​a single defect does not exceed the square of the grain length.
Higher precision: The surface of the steel plate is allowed to have a thin layer of iron oxide scale, rust, and other local defects whose height or depth does not exceed half of the thickness tolerance.
The pattern is intact. The pattern is allowed to have local slight burrs whose height does not exceed half of the thickness tolerance. 5 Inspection rules
5.1 The appearance and size of the patterned steel plate shall be checked one by one. The patterned steel plate rolled by the continuous rolling mill can be sampled by coil. 5.2 The basic thickness and grain height of the steel plate shall be measured at a distance of not less than 40mm from the edge in the width direction. The rolled patterned steel strips shall comply with the provisions of GB709.
6 Packaging, marking and quality certificate
Packaging, marking and quality certificate shall comply with the provisions of GH247. Additional remarks:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Benxi Iron and Steel Company and Anshan Iron and Steel Company. The main drafters of this standard are Kong Wei, Yue Wenguang and Dong Wenying. This standard GB/T3277-91 will be implemented from the date of implementation, replacing GB3277-82. This standard level mark GB/T 3277-911
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