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  • ASTM A312 S31254 steel pipe
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Stainless Steel Pipe & Tube

  • Material : Stainless steel
  • Size: 1/2''~48''
  • Thickness: SCH5~SCHXXS
  • End: Beveled End,Plain End

PRODUCT DESCRIPTION

Stainless steel pipes are used for high-temperature applications. Stainless steel pipe has add the alloying elements like Nickel and Chromium to the common steel alloy. This addition of the alloying elements enhances the resistance of the steel to corrosion in harsh applications.
STAINLESS STEEL TYPES
As a general rule, any steel alloy that has at least 10.5% of chromium may be considered stainless steel. Austenitic Stainless Steel (Especially series 300 chromium-nickel alloys like 304, 310S, 316, 321, 347, etc), these are the most common grades of stainless steel. Grade 304/304L is the most common austenitic stainless steel that suits most corrosive applications. Any other grade in the 300 series enhances the basic features of SS304.

We HT PIPE mainly supply the Seamless or Welded stainless steel pipes or Tubes according to the Standard ASTM A312, ASTM A213, ASTM A269, ASTM AB676, ASTM B677, the main grades are TP304, TP304L, TP310S, TP316, TP316L, 316Ti, TP317, TP317L, TP321, TP347, TP347H, S31254, N08367, N08926, N08904. Each alloy has a specific structure and chemical composition and mechanical properties.
Chemical Composition:

Grade UNS C≤ Mn P≤ S≤ Si≤ Cr Mo
TP304 S30400 0.08 2 0.045 0.03 1 18.0-20.0 -
TP304L S30403 0.035 2 0.045 0.03 1 18.0-20.0 -
TP316 S31600 0.08 2 0.045 0.03 1 16.0-18.0 2.00-3.00
TP316L S31603 0.035 2 0.045 0.03 1 16.0-18.0 2.00-3.00
316Ti S31668 0.08 2 0.035 0.03 1 16.0-19.0 1.80-2.50
TP317 S31700 0.08 2 0.045 0.03 1 18.0-20.0 3.0-4.0
TP317L S31703 0.035 2 0.045 0.03 1 18.0-20.0 3.0-4.0
TP321 S32100 0.08 2 0.045 0.03 1 17.0-19.0 -
TP310S S31008 0.08 2 0.045 0.03 1 24.0-26.0 0.75
TP347 S34700 0.08 2 0.045 0.03 1 17.0-19.0 -
  S31254 0.02 1 0.03 0.01 0.8 19.5-20.5 6.0-6.5
  N08367 0.03 2 0.04 0.03 1 20.0-22.0 6.0-7.0
  N08926 0.02 2 0.03 0.01 0.5 24.0-26.0 6.0-7.0
  N08904 0.02 2 0.04 0.03 1 19.0-23.0 4.0-5.0
  N08925 0.02 1 0.045 0.03 0.5 19.0-21.0 6.0-7.0
Mechanical Properties:
Mechanical properties Tensile,min,ksi[MPa] Yield,min,ksi[MPa] Elongation,%(min) Hardness,HB(max)
TP304 75【515】 30【205】 35 192
TP304L 70【485】 25【170】 35 192
TP316 75【515】 30【205】 35 192
TP316L 70【485】 25【170】 35 192
316Ti 75【515】 30【205】 35 192
TP317 75【515】 30【205】 34 192
TP317L 75【515】 30【205】 35 192
TP321 75【515】 30【205】 35 192
TP310S 75【515】 30【205】 35 192
TP347 75【515】 30【205】 35 192
S31254 98【675】 43【310】 35 220
N08367 100【690】 45【310】 30 241
N08926 94【650】 43【295】 35 256
N08904 71【490】 31【215】 35 192
N08925 87【600】 43【295】 40 217
The differents between these material grades:
TP304 / 304L Stainless Steel Pipe (Tube)
An Austenitic Chromium-nickel stainless steel
General purpose corrosion resistance(Non-magnetic except when cold worked)
TP304H Stainless Steel Pipe (Tube)
Higher carbon than Stainless Steel 304 for better high temperature creep properties
Corrosion resistance same as TP304, used in high temperature over 1000 degrees F 
TP310S Stainless Steel Pipe (Tube)
Superior heat resisting Austenitic stainless steel
Good for continuous exposure to 2100 degrees F. General corrosion resistance better than Stainless Steel TP304 
TP316 / 316L Stainless Steel Pipe (Tube)
An Austenitic Chromium-nickel stainless steel
Improved in the corrosion resistance to chlorides
TP317L Stainless Steel Pipe (Tube)
An Austenitic Chromium-nickel Molybdenum stainless steel
Improved in chloride pitting resistance over Stainless Steel 316 Pipe. Used in Chemical, petroleum, pulp and paper industries
TP321 / 321H Stainless Steel Pipe (Tube)
An Austenitic stainless steel that contains Titanium stabilizing elements
Improved intergranular corrosion resistance. Excellent for high temperature service
TP347 / 347H Stainless Steel Pipe (Tube)
An Austenitic stainless that contains Columbium stabilizing elements
Improved intergranular corrosion resistance. Excellent for high temperature service 
254SMO(S31254) Stainless Steel Pipe (Tube)
An Austenitic stainless steel with a high Molybdenum content
High resistance to pitting and crevice and general corrosion. Very high resistance to chloride stress corrosion cracking 
AL-6XN(N08367) Stainless Steel Pipe (Tube)
An Austenitic stainless steel with a high Molybdenum content
Exceptional resistance to chloride corrosion. Highly resistant to saltwater corrosion
904L Stainless Steel Pipe (Tube)
An Austenitic stainless steel with low Carbon content
Good resistance to pitting and crevice corrosion. Resistance to general corrosion in reducing acids

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