Pwodiksyon asye wonn respekte estanda rejyonal strik:
US: ASTM A108 espesifye frèt -fini ba wonn ak tolerans dimansyon sere (± 0.0015 pous pou dyamèt<1 in) and surface finishes (Ra ≤32 μin). ASTM A29 covers hot-rolled carbon and alloy round bars, mandating ultrasonic testing for large diameters (>4 nan).
Ewòp: EN 10060 defini tolerans dimansyon pou cho -woule ba wonn (egzanp, klas tolerans h9 pou aplikasyon pou presizyon), pandan y ap EN 10278 fikse kondisyon chimik ak mekanik pou ba wonn asye klere.
Lachin: GB/T 702 deskripsyon cho -woule dimansyon ba wonn, ak Klas 1 tolerans (± 0.25 mm pou dyamèt<50 mm) for structural uses. GB/T 1220 governs stainless round bars, aligning with ISO 9001 quality controls.
Kondisyon komen yo enkli tès tensile (daprè ASTM E8/EN 10002-1) ak limit dwat (<1 mm/m for precision grades).