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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 11263-2010 Hot-rolled H and Cut T Section Steel, and the following main changes have been made with respect to GB/T 11263-2010:
——The requirements of dimension and permissible shape deviation of H section steel in Table 3 are modified.
——The inspection item, sampling quantity and test method in Table 6 are modified.
——Annex A is adjusted to Annex E, and the content is modified.
——Annex B is adjusted to Annex F.
——Annex C is adjusted to Annex G, and the specification is modified.
——Annexes A, B, C and D are added.
This standard was proposed by the China Iron and Steel Association.
This standard is under the jurisdiction of the National Technical Committee on Iron and Steel of Standardization Administration of China (SAC/TC 183).
The previous editions of this standard are as follows:
——GB/T 11263-1998, GB/T 11263-2005 and GB/T 11263-2010.
Hot Rolled H and Cut T Section Steel
1 Scope
This standard specifies the order contents; classification and code; dimension, shape, weight and permissible deviation; technical requirements; test methods; inspection rules and packaging, marking and quality certificate of hot rolled H section steel and the T section steel cut by hot rolled H section steel.
This standard is applicable to hot rolled H section steel (hereinafter referred to as H section steel) and the T section steel cut by hot rolled H section steel.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 232 Metallic Materials - Bend Test
GB/T 700 Carbon Structural Steels
GB/T 712 Ship and Ocean Engineering Structural Steel
GB/T 714 Structural Steel for Bridge
GB/T 1591 High Strength Low Alloy Structural Steels
GB/T 2101 General Requirement of Acceptance Packaging, Marking and Certification for Section Steel
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for Mechanical Testing
GB/T 4336 Carbon and Low-alloy steel - Determination of Multi-element Contents - Spark Discharge Atomic Emission Spectrometric Method (Routine Method)
GB/T 19879 Steel Plates for Building Structure
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
3 Order Contents
The order contracts concluded in accordance with this standard shall include the following technical contents:
a) Product name and type;
b) Designation;
c) Standard No.;
d) Specification;
e) Delivery length;
f) Weight and quantity;
g) Other special requirements proposed by the demander, such as special specification requirements and special surface quality requirements.
4 Classification and Code
4.1 H section steel is classified into four categories and their codes are as follows:
Wide flange H section steel HW (W is the initial of Wide);
Middle flange H section steel HM (M is the initial of Middle);
Narrow flange H section steel HN (N is the initial of Narrow);
Thin-wall H section steel HT (T is the initial of Thin).
4.2 The cut T section steel is classified into three categories and their codes are as follows:
Wide flange cut T section steel TW (W is the initial of Wide);
Middle flange cut T section steel TM (M is the initial of Middle);
Narrow flange cut T section steel TN (N is the initial of Narrow).
5 Dimension, Shape, Weight and Permissible Deviation
5.1 Dimension and expression methods
5.1.1 The sectional illustration of H and cut T section steel and marked symbols are shown in Figures 1 and 2.
Keys:
H——Height; t2——Flange thickness;
B——Width; r——Fillet radius.
t1——Web thickness;
Figure 1 Sectional Drawing for H Section Steel
Keys:
h——Height; t2——Flange thickness;
B——Width; r——Fillet radius;
t1——Web thickness; Cx——Center of gravity.
Figure 2 Sectional Drawing for Cut T Section Steel
5.1.2 The parameters of sectional dimension, sectional area, theoretical weight and sectional characteristics of H and cut T section steel shall meet the requirements of Tables 1 and 2 respectively. According to the demander's requirements, the products meeting the requirements of Annexes A to D and Annex G or other parameters may also be supplied upon the supplier and the demander's agreement. See Annex F for the table of the contrast of model and sectional characteristic parameters between I-steel and H section steel.
5.1.3 The delivery length of H section steel and cut T section steel shall be noted in the contract. Generally, the specified length is 12,000mm, and products with other specified length may also be supplied according to the demander's requirements.
Foreword ii 1 Scope 2 Normative References 3 Order Contents 4 Classification and Code 5 Dimension, Shape, Weight and Permissible Deviation 6 Technical Requirements 7 Test Method 8 Inspection Rules 9 Packaging, Marking and Quality Certificate Annex A (Informative) Sectional Dimension, Sectional Area, Theoretical Weight and Sectional Characteristics of Hot Rolled H Section Steel Annex B (Informative) Sectional Dimension, Sectional Area, Theoretical Weight and Sectional Characteristics of Hot Rolled H Section Steel Annex C (Informative) Sectional Dimension, Sectional Area, Theoretical Weight and Sectional Characteristics of Hot Rolled H Section Steel Annex D (Informative) Sectional Dimension, Sectional Area, Theoretical Weight and Sectional Characteristics of Hot rolled H Section Steel Annex E (Informative) Supplement Rules for Repair Welding of Defects on Hot rolled H and Cut T Section Steel Annex F (Informative) Contrast of Model and Sectional Characteristic Parameters between National Standard Hot Rolled I-steel and National Standard Hot Rolled H Section Steel Annex G (Informative) Sectional Dimension, Sectional Area, Theoretical Weight and Sectional Characteristics of Super-thick and Super-heavy H Section Steel Bibliography
说明： h——高度； B——宽度； t1——腹板厚度； t2——翼缘厚度； r——圆角半径； Cx——重心。 图2 剖分T型钢截面图 5.1.2 H型钢和剖分T型钢的截面尺寸、截面面积、理论重量及截面特性参数应分别符合表1、表2的规定。根据需方要求，也可由供需双方协议供应附录A～附录D和附录G或其他参数要求的产品。工宇钢与H型钢型号截面特性参数对比表见附录F。 5.1.3 H型钢和剖分T型钢的交货长度应在合同中注明，通常定尺长度为12 000 mm，根据需方要求也可供应其他定尺长度产品。 表1 H型钢截面尺寸、截面面积、理论重量及截面特性 类别 型号 (高度×宽度) mm×mm 截面尺寸 mm 截面面积 cm2 理论重量 kg/m 表面 积 m2/m 惯性矩 cm4 惯性半径 cm 截面模数 cm3 H B t1 t2 r Ix Iy ix iy Wx Wy
注1：表中同一型号的产品，其内侧尺寸高度一致。 注2：表中截面面积计算公式为：t1(H-2t2)+2Bt2+0.858r2。 注3：表中“*”表示的规格为市场非常用规格。 表2 剖分T型钢截面尺寸、截面面积、理论重置及截面特性 类别 型号(高度×宽度) mm×mm 截面尺寸 mm 截面面积 cm2 理论重量 kg/m 表面积 m2/m 惯性矩 cm4 惯性半径 cm 截面模数 cm3 重心 Cx cm 对应H型 钢系列 型号 h B t1 t2 r Ix Iy ix iy Wx Wy
附 录 A (资料性附录) 热轧H型钢截面尺寸、截面面积、理论重量及截面特性 表A.1 热轧H型钢截面尺寸、截面面积、理论重量及截面特性
系列 型号 截面尺寸 mm 截面面积 理论重量 表面积 惯性矩 cm4 惯性半径 cm 截面模数 cm3 H B t1 t2 r cm2 kg/m m2/m Ix Iy ix iy Wx Wy
注1：型号以英制单位表示。 注2，截面尺寸中r只做参考。 附 录B (资料性附录) 热轧H型钢截面尺寸、截面面积、理论重量及截面特性 表B.1 热轧H型钢截面尺寸、截面面积、理论重量及截面特性 系列 型号 截面尺寸 cm 截面面积 理论重量 表面积 惯性矩 cm4 惯性半径 cm 截面模数 cm2 H B t1 t2 r cm2 kg/m m2/m Ix Iy ix iy Wx Wy
附 录 C (资料性附录) 热轧H型钢截面尺寸、截面面积、理论重量及截面特性 表C.1 热轧H型钢型号、截面尺寸、理论重量及截面特性 型号 截面尺寸 mm 截面 面积 理论 重量 表面积 m2/m 惯性矩 cm4 惯性半径 cm 截面模数 cm3 H B t1 t2 r cm2 kg/m Ix Iy ix iy Wx Wy
附 录 D (资料性附录) 热轧H型钢截面尺寸、截面面积、理论重量及截面特性 表D.1 热轧H型钢截面尺寸、截面面积、理论重量及截面特性 型号 截面尺寸 mm 截面面积 理论重量 表面积m2/m 惯性矩 cm4 惯性半径 cm 截面模效 cm3 H B t1 t2 r cm2 kg/m Ix Iy ix iy Wx Wy
工字钢 规格 H型钢 规格 H型钢与工字钢性能参数对比 工字钢 规格 H型钢 规格 H型钢与工字锕性能参数对比 横截面积 Wx Wy Ix 惯性半径 横截面积 Wx Wy Ix 惯性半径 ix iy ix iy
注：表中“H型钢与工字钢性能参数对比”的数值为“H型钢参数值/工字钢参数值”。 附录 G (资料性附录) 超厚超重H型钢截面尺寸、截面面积、理论重量及截面特性 表G.1超厚超重H型钢截面尺寸、截面面积、理论重量及截面特性 类别 型号(高度×宽度) 截面尺寸 mm 截面面积 理论重量 表面积 惯性矩 cm4 惯性半径 cm 截面模效 cm3 in×in H B t1 t2 r cm2 kg/m m2/m Ix Iy ix iy Wx Wy
