The production specification standard of Japanese standard angle steel 150*90*9 and Japanese standard unequal angle steel Q235B.
I. Introduction. Japanese standard angle steel 150*90*9 and Japanese standard unequal angle steel Q235B are two kinds of steel commonly used in steel structure engineering, and their quality directly affects the safety and stability of the building structure. Therefore, the specification standards for the production of these two types of angles are essential to ensure the quality of the products. This article will introduce in detail the production specifications and standards of Japanese standard angle steel 150*90*9 and Japanese standard unequal angle steel Q235B.
Second, the production specification standard of 150*90*9 for Japanese standard angle steel.
1.Raw material requirements.
The raw materials for the production of Japanese standard angle steel 150*90*9 should meet the provisions of the Japanese standard JIS G3106, use Q235B steel grade, and undergo strict quality inspection to ensure that the chemical composition, mechanical properties and other indicators of the steel meet the requirements of the standard.
2.Production process.
1) Heating: Put the raw materials into the heating furnace and heat them to 900-1100 to soften the steel for easy rolling.
2) Rolling: The heated steel is sent to the rolling mill for rolling, and according to the required size and shape, after multiple passes of rolling, the shape and size of the Japanese standard angle steel 150*90*9 are formed.
3) Cooling: The rolled steel is sent to the cooling area for cooling to eliminate internal stress and prevent deformation.
4) Straightening: Straightening the cooled steel to eliminate the bending and twisting generated during the rolling process.
5) Surface treatment: derusting, painting and other treatments on the surface of the steel to improve the corrosion resistance of the steel.
3.Dimensions and permissible deviations.
The size and allowable deviation of 150*90*9 of Japanese standard angle steel shall comply with the provisions of Japanese standard JIS G3106. In the production process, the size of the product should be strictly controlled to ensure that the dimensional deviation of the product is within the allowable range.
3. Production specifications and standards for unequal angle steel Q235B in Japanese standards.
1.Raw material requirements.
The raw materials for the production of Japanese standard unequal angle steel Q235B shall comply with the provisions of the Japanese standard JIS G3106, use Q235B steel grade, and shall undergo strict quality inspection to ensure that the chemical composition, mechanical properties and other indicators of the steel meet the requirements of the standard.
2.Production process.
1) Heating: Put the raw materials into the heating furnace and heat them to 900-1100 to soften the steel for easy rolling.
2) Rolling: The heated steel is sent to the rolling mill for rolling, and the shape and size of the unequal angle steel are formed after multiple passes of rolling according to the required shape and size of the unequal angle steel.
3) Cooling: The rolled steel is sent to the cooling area for cooling to eliminate internal stress and prevent deformation.
4) Straightening: Straightening the cooled steel to eliminate the bending and twisting generated during the rolling process.
5) Surface treatment: derusting, painting and other treatments on the surface of the steel to improve the corrosion resistance of the steel.
3.Dimensions and permissible deviations.
The size and allowable deviation of the Japanese standard unequal angle steel Q235B shall conform to the provisions of the Japanese standard JIS G3106. In the production process, the size of the product should be strictly controlled to ensure that the dimensional deviation of the product is within the allowable range.