• HAOSTEEL GROUP CO., LIMITED
  • Address : A1010, No.581 Xiuchuan road, Pudong new area, Shanghai  201299, China

Haosteel is professional manufacturer and supplier of 321 Stainless Steel Square Pipe. Quality guaranteed, On-time delivery, After-sales warranty.


Standard: ASTM A269/A312/A213/A249/A554
Grade:321
Delivery:Cold rolled Hot rolled
Surface:Mill, Pickled, HL, Polished, Mirror
Thickness:0.2mm - 30mm
Outer Diameter10*10-1000*1000mm
Length:  6000mm or as customer request
Mill:Tisco, Jisco, Baosteel, etc.
Delivery time:15 days in common

 

Description:

Type 321 is an austenitic chromium-nickel stainless steel containing Titanium which is recommended for parts fabricated by welding which cannot subsequently be annealed.Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition . This titanium addition reduces or prevents carbide precipitation during welding and in 800 – 1500°F (427 – 816°C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength.

 

Chemical composition:

CSiMnPSCrNiTi
≤ 0.08≤ 0.75≤ 2.0≤ 0.045≤ 0.0317.0 - 19.09.0 - 12.05(C=N)~0.7

 

Physical Properties:

Annealed:
Ultimate Tensile Strength – 75KSI min (515 MPA min)
Yield Strength (0.2% Offset) –30 KSI min (205 MPA min)
Elongation – 40% min
Hardness – HRB95max (217HV max) 

 

Applications:

Aircraft collector rings, exhaust stacks, carburetor air intensifier tubes, exhaust manifolds, flexible couplings, jet engine parts, mufflers, pressure vessels, tubing, fasteners, flexible metal hose and bellows.

 

Heat Treatment:

Type 321 is non hardenable by heat treatment. It can only be hardened by cold working.

 

Cold Forming:
321 can be readily formed and drawn. Like most other austenitic stainless steels, type 321 work hardens and may require annealing after severe forming.

Corrosion Resistance:
321 has excellent corrosion resistance equivalent to type 302 or 304 in the annealed condition and superior if a weldment in these grades has not been post-weld annealed or if the application involves service in the 800°F – 1600°F range.

321 Stainless Steel Square Pipe