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Steel Pipes - ASTM A778

ASTM A778 for straight and spiral butt welded unannealed austenitic stainless steel pipe products for low and medium temperature and corrosive environments with corrosion resistance without heat treatment. Covers welded unannealed tubular products with an outer diameter of 3 inches (75 mm) to 48 inches (1200 mm) and nominal wall thickness of 0.062 inches (1.57 mm) to 0.500 inches (12.7 mm).



СПАМПАВАЦЬ PDF

Steel Pipes - ASTM A778

 

Specifications Range
Out Diameter 3"-48"
Wall Thickness 0.062"-0.500"

 

ASTM A778 Standard Specification for Welded Unannealed Austenitic Stainless Steel Tubular Products covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperature and corrosive service where treatment is not necessary for corrosion resistance.

 

TABLE 1 Chemical Requirements

Гатунак UNS Designation Carbon maxB Manga-
nese,
макс
Phos-
phorus,
макс
Composition, %

 

Titanium

 
Columbium Plus Tantalus Nitrogen
макс
Sulfur,
макс
Silicon,
макс
Chromium Nickel  
TP 304L S30403 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–13.0 ... ... ... 0.10
TP 316L S31603 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00
3.00
... ... 0.10
TP 317L S31703 0.030 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 3.0
4.0
... ... 0.10
TP 321 S32100 0.08  2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... C ... ...
TP 347 S34700 0.08  2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 ... ... D ...

A New designation established in accordance with Practice E 527 and SAE J1086.

B The carbon analysis shall be reported to the nearest 0.01 %, except for the low carbon (0.030) types, which shall be reported to the nearest 0.001 %.

C The titanium content shall be not less than five times the carbon content and not more than 0.70 %.

D The columbium plus tantalum content shall be not less than ten times the carbon content and not more than 1.10 %.

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