T/JSGT 001-2025 Active Group standards

T/JSGT 001-2025 Hot rolled steel bars for microcrystalline reinforced concrete

Publish Date: 2025-10-01 Implement Date: 2025-10-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JSGT 001-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Generally, it refers to microsurgical instruments

ICS Name: \nSteel rods and steel bars

Publish Date: 2025-10-01

Implement Date: 2025-10-01

Scope

This document specifies the rolling process, chemical composition, weight deviation, mechanical properties, grain size, metallographic structure, connection performance, and surface markings of hot-rolled steel bars for microcrystalline reinforced concrete. This document is applicable to hot-rolled steel bars for microcrystalline reinforced concrete with a nominal diameter range of 10 mm to 32 mm. 1. Additions: GB/T 223.17 "Determination of Titanium Content in Iron and Steel Alloys by Anthranilic Methane Photometry"; GB/T 223.84 "Determination of Titanium Content in Iron and Steel Alloys by Anthranilic Methane Spectrophotometry"; 2. For the nominal cross-sectional area and theoretical unit weight of rebar, they shall comply with the provisions of Table 2 of GB 1499.2-2024. The allowable deviation between the actual weight and the theoretical weight shall comply with the provisions of Table 2. 10~12mm, -3.0~-5.5%; 14~20mm, -2.0~-4.5%; 22~32mm, -1.0~-3.5%; 3. GB/T 1499.2-2018 has been revised to GB 1499.2-2024; 4. Grain size: For hot-rolled steel bars for microcrystalline reinforced concrete with a nominal diameter of 20~32 mm, the actual grain size shall be 9.5 grades or finer, and for those with a nominal diameter of 10~18 mm, the actual grain size shall be 10 grades or finer. Upon agreement between the supplier and the purchaser, grain size inspection may be waived; 5. For measuring the weight deviation of rebar, the samples shall be cut from different rebar strands, with a total of 5 samples, each of which shall be no less than 500 mm in length. The length of each sample shall be measured and recorded to the nearest 1 mm. When measuring the total weight of the samples, the accuracy shall be to the nearest 1 g; 6. For checking and accepting rebar by batches, each batch shall consist of rebar of the same grade, the same furnace number, and the same specification. For batching, it is allowed to combine rebar of different furnace numbers of the same grade, the same sm