ASTM A928 UNS S31803 Super Duplex Stainless Steel Pipe

• Customization: Available
• After-sales Service: Supplied
• Warranty: 30 Years
• Model NO.: seamless/welded
• Type: Seamless
• Technique: Cold Drawn
• Material: Stainless Steel
• Surface Treatment: Polished
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Material2: Austenitic Stainless Steel
• Material3: Super Duplex Steel
• Material4: Ferritic Stainless Steel
• Material5: Martensitic Stainless Steel
• Material6: Precipitation Hardened Stainless Steel
• Material7: Urea Grade Stainless Steel Pipe
• Applicaiton: Nuclear Power/Electric Power/Oil Refining
• Applicaiton2: Oil and Gas Exploitation/Coal Chemical Industry
• Applicaiton3: Fine Chemical Industry/Natural Gas
• Applicaiton4: Offshore Engineering&Shipbuilding/Sanitary Tubes
• Applicaiton5: Seawater Desalination&Water Treatment
• Applicaiton6: Instrumentation Tubing/Heat Exchanger Tube
• Applicaiton7: Various Faucet, Hanger, Hard Water
• Applicaiton8: Sanitary Ware Supporting Frame, Pipe Joints
• Applicaiton9: Sanitary Products Connector, Soft Water Pipe Field
• Transport Package: Plywood Cases/Plastic Bags Bundled/U Tube Packing
• Specification: OD 6.35-168.3mm
• Trademark: EZS
• Origin: China
• HS Code: 730441
• Production Capacity: 200000 Tons/Year

Product Description

Product Description

Standard:	ASTM A928	Material:	S31803
Testing:	ET, HT, Flattening Test; Expansion Test, Mercurous Nitrate Test; Ammonia Vapor Test; Chemical Analysis; Microscopical Examination; Tension Testing.	Specification:	Astm A928 Uns S31803 Super Duplex Stainless Steel Pipe
Type:	Seamless/Welded	Application:	Decoration,industry Etc
Shape:	Round.square.Rectangle	Surface:	BA/2B/NO.1/NO.3/NO.4/8K/HL/2D/1D
Certification:	BV, ISO, CE, SGS Etc	Processing:	Polished, Cold Drawn, Annealed With Nitrogen Protection
Tolerance:	±1%
Highlight:	Seamless Super Duplex Stainless Steel Pipe ,  S31803 Super Duplex Stainless Steel Pipe ,  Astm A928 super duplex pipe

Astm A928 uns S31803 super duplex stainless steel pipe
 
We are one of the biggest manufactures of stainless steel & duplex steel & alloy steel tubes and pipes in China. With development more than 20 years, we have accumulated a great many clients all around the world and EZS products also won the great praise among the customers.
 
Duplex stainless steels are extremely corrosion resistant, work hardenable alloys. Their microstructures consist of a mixture of austenite and ferrite phases. As a result, duplex stainless steels display properties characteristic of both austenitic and ferritic stainless steels. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades.

Duplex stainless steels are in most cases, tougher than ferritic stainless steels. Strengths of duplex stainless steels can in some cases be double that for austenitic stainless steels. The duplex stainless steels are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steels. However, the corrosion resistance of the least resistant duplex stainless steels is greater than that for the most commonly used grades of stainless steels, i.e. 304 and 316.
 
Duplex stainless steels are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.
Property data given in this document is typical for flat rolled products covered by ASTM A240/A240M. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.
 
Equal Grade

STANDARD	WERKSTOFF NR.	UNS
Duplex UNS S31803	1.4462	S31803
Duplex UNS S32205	1.4462	S32205

 
UNS S31803 Duplex Pipe Chemical Composition

Grade	Duplex S31803	Duplex S32205
C	0.030 max.	0.030 max.
Mn	2.00 max.	2.00 max.
Si	1.00 max.	1.00 max.
P	0.030 max.	0.030 max.
S	0.020 max.	0.020 max.
Cr	22.0 - 23.0	21.0 - 23.0
Ni	4.50 - 6.50	4.50 - 6.50
Mo	3.0 - 3.5	2.50 - 3.50
N	0.14 - 0.20	0.08 - 0.20
Fe	63.72 min.	63.54 min

 
UNS S31803 Duplex Pipe Mechanical Properties

Element	Duplex S31803	Duplex S32205
Density	7.805	7.805
Melting Point	0.285	0.285
Tensile Strength	1420 - 1465	1420 - 1465
Yield Strength (0.2%Offset)	2588 - 2669	2588 - 2669
Elongation	25 min.	25 min.

 
UNS S31803 Duplex Pipe Physical Properties

Density	Thermal Expansion	Modulus of Elasticity	Thermal Conductivity	Electrical Resistivity
g/cm3	K	Gpa	W/m.k	Ω.m
7.805	13.7*10-6	200	19	0.085*10-6

 
Application

• Chemical processing
• Transport and storage
• Oil and Gas exploration and processing equipment
• Marine and other high chloride environments
• Pulp and paper digesters
• Liquor tanks and paper machines