https://youtu.be/pSi0qE8l1bo 1. Chinese National Standard (GB/T) Standard Code: GB/T 706-2016 “Hot-Rolled Section Steel” Key Parameters: Material & Mechanical Properties: Common Grades: Q235B, Q345B. Yield Strength (σₛ): Q235B: ≥235 MPa; Q345B: ≥345 MPa. Tensile Strength (σ_b): Q235B: 375–500 MPa; Q345B: 470–630 MPa. Elongation (δ₅): Q235B: ≥26%; Q345B: ≥21%. Chemical Composition (%):
https://www.facebook.com/content/insights/?content_id=UzpfSTYxNTYyNTM2MTQ3MTE5OjEyMjExNDUzNTcxMDQxNzg3MToxMjIxMTQ1MzU3MTA0MTc4NzE%3D Advantages in industrial scale and output: Huge output: China is the world’s largest steel producer, and its steel output accounts for an extremely high proportion of the global total. For example, in some past years, China’s steel output can reach more than half of the global total output.
Calculation method for theoretical weight The formula for calculating the theoretical weight of rebar is (unit: kilograms/meter), where is the nominal diameter of the rebar (unit: millimeters). For example, for rebar with a nominal diameter of 10 millimeters, the theoretical weight per meter is kilograms/meter. This formula is derived based on the
The following are the general reference values for the tensile strength, cold bending and welding performance of threaded steel: Tensile strength:The standard value of the tensile strength of HRB400 threaded steel should not be less than 400 MPa; the standard value of the tensile strength of HRB500 threaded steel
The reasons why the world buys steel from China mainly include the following: China is the world’s largest producer of steel, with crude steel production ranking first in global output. It has huge steel production capacity and output, which can meet the massive demands of the global market. China’s
