GB/T 11251-2020 Translated English of Chinese Standard. (GBT 11251-2020, GB/T11251-2020, GBT11251-2020): Alloy structural steel plate and striphttps://www.chinesestandard.net, 2020. 6. 12. - 16페이지 This Standard specifies the order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of alloy structural steel plate and strip. This Standard applies to alloy structural steel hot-rolled steel plates whose thickness is 4 mm ~ 200 mm (hereinafter referred to as steel plates) and alloy structural steel hot-rolled steel strips (including shear steel plates) whose thickness is not greater than 12 mm and width is less than 600 mm. |
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| 3 | |
Scope | 5 |
Order content | 6 |
Technical requirements | 7 |
Test method | 11 |
| 12 | |
Packaging marking and quality certificate | 13 |
Appendix A Normative Size shape weight and allowable deviation of the steel strip | 14 |
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25CrMnSi and 30CrMnSisteel 30CrMnSisteel plates acid pickling alloy structural steel annealing banded structure batch Brinell hardness buyer and indicated chemical composition contract delivered by acid Delivery status difference of steel edge elongation after break full decarburized layer greater than 12 high-temperature tempering status Higher thickness accuracy Inspection item layer full decarburized marking and quality mechanical properties meet the requirements Metallic materials Microstructure millimeters Nominal width nominal thickness order content partial decarburized layer plate and steel plates whose thickness properties of steel provisions of GB/T quality certificate Re-inspection and determination requirements of Table special requirements steel hot-rolled steel steel products Steel strip thickness Steel strip width strip are allowed strip shall meet strips shall comply structural steel hot-rolled structural steel plate supplier Table A.1 Tensile strength test GB/T Thickness allowable deviation thickness and allowable thickness is greater Three-point difference total decarburized layer ultrasonic testing weight and allowable width and allowable