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ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube For Chemical Process Plant

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ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube For Chemical Process Plant

Brand Name : Yuhong

Model Number : ASTM A789 UNS S31803

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : China

MOQ : 100 kgs

Price : Negotiable

Payment Terms : L/C, T/T

Delivery Time : 20 days

Packaging Details : Ply-wooden Case /Iron Case/ Bundle with plastic Cap etc.

Standard : ASTM A789

Grade : UNS S31803

Seamless pipe & Tube Size : 1/2”to 8"

Outer Diameter : 6.0- 630 mm

Schedules : 10s, 20, 40s, 40, 60, 80s, 80, 100, 120, 140, 160, XXH

NDT Test : HT/UT/ET

Application : Boilers, Superheaters and Heat Exchangers

High light : UNS S31803

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ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube For Chemical Process Plant

ASME SA789 S31803 stainless steel tubing provides better pitting and crevice corrosion resistance than 316L or 317L austenitic stainless steel in almost all corrosive media. It also has high corrosion and erosion fatigue properties, as well as lower thermal expansion rates and higher thermal conductivity compared to austenitic stainless steels. The advantage of a duplex structure is that it combines the advantages of ferritic alloys, stress corrosion resistance, crack resistance, and high strength with the ease of manufacture and corrosion resistance of austenitic alloys.

Chemical Composition

Grade

C

max

Si

max

Mn

max

P

max

S

max

 Cr Ni Mo N
UNS S32750 0.030 0.8 1.2 0.030 0.015 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.32
UNS S31803 0.030 1.0 2.0 0.020 0.020 21.0-23.0 4.5-6.5 2.5-3.5 0.08-0.20
UNS S31500 0.030 1.0 1.2-2.0 0.030 0.030 18.0-19.0 4.5-5.5 2.5-3.5 0.05-0.10

Physical Properties

Grade Y.S.MPa min T.S.Mpa min Elongation % Hardness HRC
UNS S32750 550 800 15 20
UNS S31803 450 620 25 20
UNS S31500 440 630 30

20

Heat Treatment Requirements

UNS

Designation

 Temperature Quench
S31803 1870-2010 °F [1020-1100°C] Rapid cooling in air or water
S32205 1870-2010 °F [1020-1100°C] Rapid cooling in air or water
S31500 1800-1900 °F [980-1040°C] Rapid cooling in air or water
S32550 1900 °F [1040°C] min. Rapid cooling in air or water
S31200 1920-2010 °F [1050-1100°C] Rapid cooling in water
S31260 1870-2010 °F [1020-1100°C] Rapid cooling in water
S32001 1800-1950 °F [982-1066°C] Rapid cooling in air or water
S32304 1700-1920 °F [925-1050°C] Rapid cooling in air or water
S32750 1880-2060 °F [1025-1125°C] Rapid cooling in air or water
S32760 2010-2085 °F [1100-1140°C] Rapid cooling in air or water
S32950 1820-1880 °F [990-1025°C] Rapid cooling in water
S32520 1975-2050 °F [1080-1120°C] Rapid cooling in air or water

Duplex Stainless Steel Pipe Application

  • Chemical processing
  • Transport and Storage
  • Oil and gas exploration and offshore rigs
  • Oil and gas refining
  • Marine environments
  • Pollution control equipment
  • Pulp and paper manufacturing
  • Chemical process Plant

S31803 Tubes Ordering Information

Orders for product under this specification should in- clude the following, as required, to describe the desired material adequately:

  • Quantity (feet, metres, or number of lengths)
  • Name of product (seamless or welded tubes)
  • Grade
  • Size (outside diameter and average wall thickness, unless minimum wall thickness is specified)
  • Length (specific or random)
  • Special requirements

ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube For Chemical Process Plant


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