ISO 9001:2008 Registered
Hunan Standard Steel Co.,Ltd is as the one of member of Husteel Industry Group, as the professional manufacturer of steel pipe and pipe fittings,which has a complete system of production and sales serving our customers. 
Factory          Group
  

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

Grade
UNS Designation
Carbon maxB
Manga-
nese,
max
Phos-
phorus,
max
Composition, %


Titanium



Columbium Plus Tantalus
Nitrogen
max
Sulfur,
max
Silicon,
max
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 %.