ASTM A615 Steel Barbaco ee Daaweynta Qofka

Dhulka ASTM A615 waxaa u baahan yihiin xoogga American Society for Testing and Materials ee dhulka carbon steel deformed bars ee ku jirin koonfurta, oo ka mid ah carruurta North American. Xogtaas waa in la xiriira sannadood oo dhexeeya hore ee yield strength: Sannad 40 (276 MPa), Sannad 60 (414 MPa), iyo Sannad 75 (517 MPa), markii Sannad 60 ayaa mid ka ah ee ku jiran carruurta gaar ah ee carruurtida, sababtoo kale uu ku haystaan bal eeg iyo caawimaad. Dhulka ASTM A615 ayaa ka mid ah surface ee deformed ee ku jirin ribs ee longitudinal iyo transverse ee ku jirin bond ee koonfureedka, si aad ugu yaraan chemical composition limits (carbon ≤0.30%, manganese ≤1.60%) ee ka jiro weldability iyo formability. Xogga manufacturing ayaa ka mid ah hot rolling, markaasna cold working optaalka ah ee ku jirin strength gacanta, sidoo kale markii cold worked rebars ayay ku sameeyaan requirements ee ductility ee kala duwan (elongation ≥8% ee Sannad 75). Requirements ee testing ee key under ASTM A615 waxaa lagu sameeyaan tensile tests ee ku jirin yield iyo tensile strength, bend tests ee ka jirin ductility (bending 180° around a mandrel without cracking), iyo weight per unit length checks ee ka jirin dimensional compliance. Mareyntaas waa la useeyo carruurta ee dhammaantood, oo aan ugu jirin residential slabs (Sannad 40) to bridge decks (Sannad 60) iyo foundations ee dhammaan industrial (Sannad 75). ASTM A615 waxaa u baahan yihiin coatings optaalka ah, sababtoo kale epoxy (ASTM A775) ama zinc (ASTM A767) ee ku jirin protection ee kor, iyo seismic resistant grades (ASTM A706) ee ku jirin ductility iyo low carbon content ee energy dissipation ee zones ee dhaqanka. Compliance ee ASTM A615 waa mandatory carruurtada public ee USA, iyo carruurtood ee internationals ee ku jirin standards ee American, si aad ugu yaraan consistency ee properties ee material iyo quality assurance processes.