ASTM Specifications A 213 Seamless Ferritic & Austenitic Boiler, Superheater, Heat Exchanger Tubes A 249 Welded Austenitic Boiler, Superheater, Heat Exchanger and Condenser Tubes A 268 Seamless & Welded Ferritic Stainless for General Service A 269 Seamless & Welded Austenitic Stainless for Genl. Service A 270 Seamless & Welded Austenitic Stainless Sanitary Tubing A 450 Genl. Require. for Ferritic & Austenitic Alloy Tubes A 511 Seamless Stainless Mechanical Tubing A 554 Welded Stainless Mechanical Tubing A 632 Seamless & Welded Austenitic Stainless Small Diameter Tubing for General Service A 688 Welded Austenitic Feedwater Heater Tubes A 771 Austenitic Stainless Tubing for Breeder Reactor Components A 826 Austenitic & Ferritic Duct Tubes for Breeder Reactor Core A 851 High Frequency Induction Weld. Unannealed Austenitic Condenser Tubes ======================================================================= AMS Specifications 5556 347 Seamless or Welded - hydraulic 5557 321 Seamless or Welded - hydraulic 5558 347 Welded, thin wall 5559 321 Welded, thin wall 5560 304 Seamless 5565 304 Welded 5566 304 Seamless, cold drawn - high pressure 5567 304 Seamless or Welded - hydraulic 5570 321 Seamless 5571 347 Seamless 5572 310 Seamless 5573 316 Seamless 5574 309S Seamless 5575 347 Welded 5576 321 Welded 5577 310 Welded 5591 410 Seamless, cold drawn 5609 410 Mod. Mechanical, ferrite controlled 5611 410 Mod. Mechanical, ferrite controlled 5612 410 Mod. Mechanical, ferrite controlled 5613 410 Mechanical 5627 430 Mechanical 5639 304 Mechanical, cold finished 5645 321 Mechanical 5646 347 Mechanical 5647 304L Mechanical 5648 316 Mechanical 5650 309S Mechanical 5651 310 Mechanical 5652 314 Mechanical 5653 316L Mechanical 5654 347 Mechanical