Stainless steel fittings

Fittings	ASTM	EN
STANDARDS	ASTM A403	EN 10253
	ASTM A182
	MSS SP-43
Stainless STEEL GRADE	304	1.4301
	304L	1.4306
	321	1.4541
	316	1.4401
	316L	1.4404
	316TI	1.4571
	316SL	1.4435
	316L	1.4432
	310S	1.4845
	31803	1.4562
	309	1.4828
	316H	1.4919
	321H	1.4941
	304H	1.4948
	347H	1.4961
		1.4417 (Duplex)
		1.4462 (Duplex)
		1.4501 (Super-duplex)
* The tables above show the most common "Grades/Standards" but are not exhaustive!