GB/T 11263-2024 Hot rolled H and cut T section steel
1 Scope
This document specifies the ordering contents, classification, code, dimension, shape, weight and permissible deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of hot rolled H section steel and T section steel cut from hot rolled H section steel.
This document applies to hot rolled H section steel (hereinafter referred to as H section steel) and T section steel cut from hot rolled H section steel (hereinafter referred to as T section steel).
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, 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 testing method
GB/T 700 Carbon structural steel
GB/T 712 Structural steel for ship and ocean engineering
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 samples and 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 plate for building structure
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 33968 Hot rolled steel sections with improved weldability
GB/T 34103 Hot rolled H section steel for ocean engineering structure
GB/T 41749 General requirements for surface condition of hot-rolled sections
YB/T 4261 Hot rolled fire-resistant H section steel
YB/T 4620 Hot rolled anti-seismic H section steel
YB/T 4831 Through-thickness characteristics of hot rolled H-section steel
3 Terms and definitions
None.
4 Ordering contents
The contract or order placed under this document shall contain at least the following contents:
a) Product name and category;
b) Grade;
c) No. of this document;
d) Specification;
e) Delivery length;
f) Weight and quantity;
g) Other special requirements put forward by the buyer, e.g., special specification requirements, special surface quality requirements, etc.
5 Classification and code
5.1 H section steel is classified into two categories, with the following codes:
—H section steel ("H" represents general-purpose H section steel);
—HK section steel ("HK" represents extended H section steel).
5.2 T section steel code is "T section steel" ("T" means cut T section steel).
6 Dimension, shape, weight and permissible deviation
6.1 Dimension and representation method
6.1.1 The sectional views of the H and T section steel are shown in Figures 1 and 2.
Key:
H—height;
B—breadth;
t1—web thickness;
t2—flange thickness;
r—fillet radius;
X-X—transverse axis of center of gravity;
Y-Y—longitudinal axis of center of gravity.
Figure 1 Sectional view of H section steel
Key:
h—height;
B—breadth;
t1—web thickness;
t2—flange thickness;
r—fillet radius;
Cx—center of gravity;
X-X—transverse axis of center of gravity;
Y-Y—longitudinal axis of center of gravity.
Figure 2 Sectional view of T section steel
6.1.2 The sectional dimensions of H and T section steel shall meet the requirements of Annex A, Annex B and Annex C, respectively, where the fillet radius (r), outer surface area and moment of inertia (Ix, Iy), radius of inertia (ix, iy) and section modulus (Wx, Wy) are the reference values in Annex A, Annex B and Annex C. According to the requirements of the buyer, products with other parameter requirements may also be supplied by agreement between the seller and the buyer. Calculation reference equations for sectional area, theoretical weight and sectional features of H section steel are shown in Annex D.
6.1.3 The delivery length of H and T section steel shall be indicated in the contract. Usually, the specified length is 12,000 mm. Products of other specified length may also be supplied according to the requirements of the buyer.
6.2 Dimension, shape and permissible deviation
6.2.1 The dimension, shape and permissible deviation of H section steel shall be as specified in Table 1. The permissible height deviation of T section steel shall be as specified in Table 2, and the permissible deviation of other parts shall be according to the parts of corresponding H section steel specifications.
6.2.2 According to the requirements of the buyer, the dimension, shape and permissible deviation of H and T section steel may also be as specified in the agreement between the seller and the buyer.
6.2.3 H and T section steel shall not have obvious torsion.
C Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Ordering contents 5 Classification and code 6 Dimension, shape, weight and permissible deviation 6.1 Dimension and representation method 6.2 Dimension, shape and permissible deviation 6.3 Weight and permissible deviation 6.4 Representation method for specification 6.5 Customization method for H section steel specification 7 Technical requirements 7.1 Delivery condition 7.2 Grade and chemical composition of steel 7.3 Mechanical and technological properties 7.4 Surface quality 8 Test methods 9 Inspection rules 9.1 Inspection and acceptance 9.2 Batching rules 9.3 Sampling rules 9.4 Reinspection and judgment 10 Packaging, marking and quality certificate Annex A (Normative) Nominal section dimension, sectional area, theoretical weight and sectional features of H section steel Annex B (Normative) Nominal section dimension, sectional area, theoretical weight and sectional features of HK section steel Annex C (Normative) Nominal section dimension, sectional area, theoretical weight and sectional features of cut T section steel Annex D (Informative) Sectional area, theoretical weight and sectional features of H section steel
