Super Duplex Steel Pipes & Tubes

Chemical Composition & Mechanical Properties of Super Duplex Steel Pipes & Tubes

Specification	Alloy	Grade	Si (Max)	Fe (Max)	Cu (Max)	Mn (Max)	Cr (Max)	Ni (Max)	Mo (Max)	N (Max)	Others (Max)	Yield Strength (Min) MPa	Tensile Strength (Min) MPa	% Elongation	Hardness (Max)
ASTM A790	Super Duplex 2507	-	1.00	0.50	0.30	1.50	25.00	7.00	4.00	0.22	0.10	550	800	15	95 HRB
ASTM A790	Super Duplex 2205	-	1.00	0.50	0.30	1.50	22.00	6.00	3.00	0.18	0.10	500	720	25	92 HRB
ASTM A276	Super Duplex 2304	-	1.00	0.60	0.25	1.50	23.00	4.50	2.50	0.12	0.05	480	700	28	90 HRB
ASTM A790	Super Duplex 2507	-	0.80	0.40	0.25	1.50	26.00	7.00	5.00	0.25	0.15	600	850	18	98 HRB

Category	Details
Standard Pipe Dimensions	Outer Diameter (OD): 1/8" (0.375") to 48" (12.5 cm)
	Wall Thickness (WT): Varies from Schedule 10 to Schedule 160
	Schedules: 5, 10, 20, 40, 80, 160, XXS (Extra Extra Strong), etc.
Pipe Manufacturing Process	Seamless Pipe: Formed from a solid billet, no welding required
	Welded Pipe: Made from welded stainless steel coils
	ERW (Electric Resistance Welded): Uses electric resistance for welding
	Spiral Welded Pipe: Weld spirally wound around the pipe (for large sizes)
Surface Finishes	Mill Finish: Basic finish from manufacturing
	Pickled and Passivated: Removes scale and oxide for better corrosion resistance
	Polished: Mirror or satin finish for aesthetic and sanitary applications
	Brushed: Textured, non-reflective surface for architectural use
Applications	Industries Served: Food & Beverage, Chemical & Petrochemical, Marine & Offshore, Oil & Gas

Spec	Outside Dia. (Avg)	Pipe Body	Pipe End	Wall Thickness	Weight	Length (Nominal)	Dimensions/Weight Tolerance
ASTM A790	±0.2%	N.A.	+10%, -5%	±10%	+10%	Upto 6m: ±3mm	±3mm, -6mm, +6mm
ASTM A790	±0.25%	N.A.	+10%, -5%	±10%	+10%	Upto 6m: ±3mm	±3mm, -6mm, +6mm
ASTM A276	±0.3%	N.A.	+10%, -5%	±10%	+10%	Upto 6m: ±3mm	±3mm, -6mm, +6mm