American Standard A992 H steel seem yog ib hom hlau zoo uas tsim los ntawm American tus qauv, uas yog nto moo rau nws lub zog siab, siab toughness, zoo corrosion kuj thiab vuam kev ua tau zoo, thiab yog dav siv nyob rau hauv kev tsim kho, choj, nkoj, ...