Studs machined from heat-treated bar can be certified on the tests made on that bar (ASTM A962, which A193, A194 and A320 call up), and A193 waives the stud tension test for studs made from A193 bar already tested, unless they are heat treated again. Both hold only if every piece is known to come from that heat and lot.
Sour-service grades need a step after the saw. ASTM A193 calls for a final stress relief on B7M after all machining, cutting and forming; A194 asks the same of 2HM and 7M nuts, and A320 of L7M. Sawing in-house keeps the cut list, the heat and the job together.
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model dataThe saw is generic: an automatic horizontal band saw with twin columns, a shuttle vise and a split front vise, drawn without any maker's features. The 2 in. bar and the heat number H-24A117 are examples; no lengths, speeds or feeds are shown. The band lies flat on its wheels and the guides twist the cutting run so the teeth face the bar; the gullets carry the chips out of the cut. Heat traceability from ASTM A962 and A484. The cut is shown time-lapsed and the teeth slowed down.
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