ASTM A790 2507 / 2205 1.4462 / 1.4410 Duplex Welded Tube For Chemical Industry     Liaocheng Sihe SS Material Co., Ltd. is a leading manufacturer who is specialized in stainless steel seamless pipes , bright annealed tubes , seamless coiled tubing etc . In order to facilitate customers , we have welded pipes and tubes too . Liaocheng Sihe SS Material Co., Ltd. has the most advanced producing and testing equipment . We can totally satisfy your requirement . According to standard very strictly , tubes which produced by us always have correct OD and WT tolerance . The tolerance control is strictly accordance to produce standards . Our products are always satisfied with customers . Customers purchased our products created more profits . a) OD ( Outer Diameter ) : 3.18mm to 101.6mm b) WT ( Wall Thickness ) : 0.5mm to 20mm c) Length : According to customer's requirement d) Standards : ASTM A312; ASTM A269; ASTM A789; ASTM A790 etc e) Process Method : ERW, EFW etc

UNS Designation	C	Si	Mn	P	S	Cr	Ni	Mo	N	Cu
	max	max	max	max	max
S31803	0.03	1	2	0.03	0.02	21.0 - 23.0	4.5 - 6.5	2.5 - 3.5	0.08 - 0.20	-
S32205	0.03	1	2	0.03	0.02	22.0 - 23.0	4.5 - 6.5	3.0 - 3.5	0.14 - 0.20	-
S32750	0.03	0.8	1.2	0.035	0.02	24.0 - 26.0	6.0 - 8.0	3.0 - 5.0	0.24 - 0.32	0.5 max
S32760	0.05	1	1	0.03	0.01	24.0 - 26.0	6.0 - 8.0	3.0 - 4.0	0.20 - 0.30	0.50 -1.00