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Technical conditions for the production of 800,000 tons of rod technology.

Update time:2018-03-30 13:16:56    点击次数:

Technical conditions for the finished product of 800 thousand tons bar rolling process.

1. Product standard of hot rolled ribbed bar.

The steel reinforced concrete shall meet the requirements of GB1499 (including chemical composition, mechanical properties, dimensional tolerance, surface quality, etc.). Its main technical requirements are:

1.1 the rebar shall be inspected and checked in accordance with the batch. Each batch of steel shall be less than 60t, and each batch of rebar shall be made up of the same number, the same furnace number, the same specification and the steel reinforcement in the same delivery state.

1.2 it is allowed to be mixed batch with the same number, the same smelting method and the same pouring method, but each batch of no more than 6 pot number. The difference of carbon content of each pot is not greater than 0.02%, and the difference of manganese content is not greater than 0.15%.

1.3 the length of delivery shall be indicated in the contract, and the allowable deviation shall not be greater than +50 mm.

1.4 the bending degree of the steel bar should not be greater than 4mm, and the total curvature is not greater than 0.4% of the total length.

1.5 according to the requirements of the demander, when the reinforcement is delivered according to the weight deviation, the actual weight and the allowable deviation of the nominal weight shall be in accordance with the provisions of table 1-1.

Table 1-1: allowable deviation table of actual weight and nominal weight of steel bar.

Nominal diameter (mm) actual weight and nominal weight deviation (%)

14 to 20 + / - 5

22-40 + 4

1.6 inspection and acceptance of reinforcement shall be carried out according to the provisions of GB1499.

2. Standard of round steel products.

2.1 the diameter accuracy shall be in line with the allowable deviation or 1/2din 1013 of GB702.

2.2 non-roundness: no more than 40 mm round steel: no more than 50% of nominal diameter tolerance:

> 40mm round steel: no more than 70% of nominal diameter tolerance.

2.3 the unflatness is less than or equal to 4 mm /m, and the total bending degree is less than or equal to the total length of 0.0.4%;

The length of the fixed length is allowed to be deviation +40 mm.

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Company address:Room 1702, no. 1, science park, xishan economic development zone, wuxi city, jiangsu province.
factory address:500 meters north of Loess Temple, Changcao Road, Wanshi Town, Yixing City, Wuxi City, Jiangsu Province
Email:452616545@qq.com Telephone/fax:0510-83277788
The contact:Mr. Li Cellphone:18921285777 13395641717
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