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Hollow anchor bar means a rod that transfers the structures or geotechnical load to a stable rock formations, anchor bolt consists of rod, drill bit, coupling, plate, grouting stopper and nut. Widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It`s irreplaceable in narrow construction environment. Hollow anchor bar is made of seamless tube with high strength.
St52 belongs to low-alloy high-strength steel,Corresponding to China what material st52 is equal to Q345B, or 16mn and Q345D, Section Steel yield strength(ReH Mpa):≤16mm:≥345;16-40mm:≥335;40-63mm:≥325;63-80mm:≥315; 80-100mm:≥305;100-150mm:≥285;150-200mm:≥275;200-250:≥275; 250-400:≥265. tensile strength(Rm Mpa):450-630. elongation:≥21. impulse test:-20℃:≥34 Application:widely used inmechanical manufacture,construction field,farm vehicles,agriculture greenhouse,automotive Steel Wire...
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