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ASTM A790 UNS S32750 SUPER DUPLEX STAINLESS STEEL SEAMLESS Pipe & TUBES

Duplex 2507 is a super duplex stainless steel developed for applications that demand high strength and corrosion resistance. Alloy 2507 has 25% chromium, 4% molybdenum, and 7% nickel. This high molybdenum, chromium and nitrogen content causes high resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.

Using Super Duplex UNS S32750 must be restricted to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507.

The steel combines high mechanical strength (typically up to 570 MPa yield strength) and good ductility with outstanding corrosion resistance in marine environments. The alloy is supplied with a PREN (Pitting Resistance Equivalent) at >= 40.0 which guarantees high resistance to pitting corrosion. In addition, the steel offers high resistance to crevice corrosion and stress corrosion cracking. Ambient and sub-zero (down to minus 50°C) notch ductility is good.

These attributes mean that this super duplex steel can be used successfully as an alternative to 300 series stainless steel (such as type 316), standard 22% Cr duplex steel (such as UNS S31803 / 1.4462 with PREN 33-34) and precipitation hardening stainless steels (typically 17/4PH).

ASTM A790 UNS 32750 SUPER DUPLEX STAINLESS STEEL SEAMLESS PIPES

ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Specification	ASTM A789, ASTM A790, ASTM A928, ASME SA789, ASME SA790, ASME SA928
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Grades	UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF® 2205, SAF® 2507, FERRINOX® 225, AMINOX® 225, ZERON® 100
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Type	SEAMLESS / WELDED / ERW / EFW / COLD DRAW / HOT FINISH / COLD FINISH
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Outer Diameter Size	SEAMLESS - 1/2" NB TO 18" NB WELDED / ERW- 1" NB TO 16" NB EFW - 8" NB TO 110" NB
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Wall Thickness	Schedule 10 To Schedule 160 (3 mm to 100 mm Thickness)
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Length	01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Ends	Plain Ends / Beveled Ends
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Delivery Conditions	As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw, Bright Annealed
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Coating	Electropolish, Mechanical Polish, Satin Finish, Passivated
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Other Testing	Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiographic Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Dimension	All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Value Added Services	Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Packaging	Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Shipment & Transportation	By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes
ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes Material Test Certificate	Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC

CHEMICAL COMPOSITION OF ASTM A790 UNS S32750 SUPER DUPLEX STAINLESS STEEL SEAMLESS PIPES

Elements	C	Cr	Cu	Fe	Mo	Mn	N	Ni	P	S	Si	W
Minimum		24.0		REMAINDER	3.00		0.24	6.00			0.20	0.50
Maximum	0.030	26	0.50		5.00	1.20	0.32	8.00	0.035	0.020	0.80	1.00

MECHANICAL PROPERTIES OF ASTM A790 UNS S32750 SUPER DUPLEX STAINLESS STEEL SEAMLESS PIPES

0.2% Proof Stress (N/mm2 ) [ksi] minimum	550[79.8]
Ultimate Tensile Strength (N/mm2) [ksi] minimum	800 [116]
Elongation (%) minimum	25
ardness (HBN)	270 max
Reduction of Cross Section Area (%)	45
Charpy V-notch Impact at ambient Temp (J) [ft.lb]	80min [59min]
Charpy V-notch Impact at -46°C (J) [ft.lb]	45av, 35min [33av, 25.8min]

Additional Testing
ASTM G48A Corrosion test at 40°C	No pitting and weight loss <4.0g/m2
Ultrasonic Testing	According to ASTM A388
Ferrite Content	35%-55%
Microstructure	Microstructure certified free from grain boundary carbides, sigma, chi and laves phases

PHYSICAL PRIPERTIES OF ASTM A790 UNS S32750 SUPER DUPLEX STAINLESS STEEL SEAMLESS PIPES

Density (Kg.m-1)	7810
Magnetic Permeability	33
Young’s Modulus (N/mm2)	199 x 103
Specific Heat, 20°C (J.Kg-1.°K-1)	475
Fracture Toughness, Kq (MPa.m)	475
Specific Electrical Resistance, 20°C (µO.m)	0.80
Thermal conductivity, 20°C (W.m-1.°K-1)	14.2
Mean coefficient of thermal expansion, 20-100°C (°K-1)	11.1 x 10-6

ALLOY COMPARISON SUPER DUPLEX STAINLESS STEEL

Alloy Comparisons	S31803	S17400 (17-4PH)	718 ( ST )	S31254	Alloy 32750
0.2% Proof Strength (N/mm2), minimum	450	1070	550	300	550
Corrosion Rate (mm.y-1) Seawater	<0.01	~1	<0.01	<0.01	<0.01
Corrosion Rate (mm.y-1) 10% sulphuric acid at 80°C	<0.4	10	>1	1.5	<0.15
Corrosion Rate (mm.y-1) Boiling 50% nitric acid	<0.15	<0.15	<0.15	0.4	<0.15
Wear Properties related to Hardness (HBN)	RC25	RC38	RC20	RC20	RC28

MAIN FEATURES OF UNS S32750 SUPER DUPLEX STAINLESS STEEL

UNS S32750 has excellent corrosion resistance in a wide variety of corrosive chemicals
Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C
High strength compared to austenitic and 22%Cr duplex stainless steels
Excellent ductility and impact strength at both ambient and sub-zero temperatures
High resistance to abrasion, erosion and cavitation erosion
Excellent resistance to stress corrosion cracking in chloride containing environments
UNS S32750 is listed in NACE MR 01 75 for sour service
ASME Approval for Pressure Vessel application

APPLICATION OF ASTM A790 UNS S32750 SUPER DUPLEX STAINLESS STEEL SEAMLESS PIPES

Chemical Process Industry: Due to its high corrosion resistance UNS S32750 is ideal for use in Nitric Acid Processes, Polypropylene Production, PVC Production, Dioxide, Caustic Evaporators, and Equipment.
Handling Organic and Fatty Acids.
Marine Industry and Shipbuilding: Propellers and Shafts, Rudders, Shaft Seals, Pumps, Bolts and Fasteners, Valves, Instrumentation, Oil and Chemical Tankers
Oil and Gas Industry: Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea Equipment
Pollution Control: Fans and pumps, Wet Scrubbers, Incinerators
Pulp and Paper Industry: Black liquor heater tubes, Digester Blow Valves, Rotary Feed Valves, I.D.Fans, Brownstock Washers, Precipitators, Bleaching Components
Food Industry: Sugar Cane Centrifuges, Corn and Vegetable processing plant
Agrochemicals: Fertilizer Production (Wet phosphoric acid)
Civil Engineering: Sewage Treatment

Jay Hou

LIAOCHENG KUNCHENG PIPE CO.,LTD

Room A2709 ChuangYe Building,Liaocheng City, Shandong Province, China

Mobile&Whatsapp:+8613184174934(Wechat)

Tel&Fax:0086-0635-2930669

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PRODUCTS MENU:

Honed Tube : JIS STKM13C, DIN ST52, SAE1020 ,DIN CK45 etc.
Alloy Seamless Tube: ASME SA-335 (P5, P9, P11, P22 P91) A213 -T22/T12 etc.
Hollow seamless bar :AISI 4130 ,ASTM 4140 etc.
Carbon steel pipe :ASTM A106 Gr.B
Stainless steel pipe : 304, 316, 316L & H grades etc.
Hollow section :S235JR, S275JR, S355JR, P265GH, P355N

SERVICES MENU:

Machining:Turning , Threading , Milling , Boring , Grooving , Skiving , Trepanning , Sawing , Straightening , honing etc

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