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ASTM A53
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ASTM A312
ASTM A350
ASTM A105
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A350 LF2
ASTM A234
ASTM A420
ASTM A860
 A193 B7
A194 2H
A240 GR.410
A312 S31726

ASTM A312 

ASTM A312 - Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipe

  Chemical Compositions  (max %)
Grade  C Mn S Si  Cr  Ni Mo  Ti Co Ta
TP304  0.08 2.00 0.045 0.030 1.00 18.0-20.0  8.0-11.0           
TP304L  0.035a  2.00 0.045 0.030 1.00 18.0-20.0  8.0-13.0           
TP304H  0.04-0.10  2.00 0.045 0.030 1.00 18.0-20.0  8.0-11.0           
TP304N  0.08 2.00 0.045 0.030 1.00 18.0-20.0  8.0-18.0          0.10-0.16 
TP304LN  0.035 2.00 0.045 0.030 1.00 18.0-20.0  8.0-12.0          0.10-0.16 
TP316  0.08 2.00 0.045 0.030 1.00 16.0-18.0  11.0-14.0b 2.00-3.00         
TP316L  0.035a  2.00 0.045 0.030 1.00 16.0-18.0  10.0-14.0  2.00-3.00         
TP316H  0.04-0.10  2.00 0.045 0.030 1.00 16.0-18.0  11.0-14.0b 2.00-3.00         
TP316Ti  0.08 2.00 0.045 0.030 0.75 16.0-18.0  10.0-14.0  2.00-3.00  5×(C+N) min, 0.70      0.1
TP316N  0.08 2.00 0.045 0.030 1.00 16.0-18.0  11.0-14.0b 2.00-3.00        0.10-0.16 
TP316LN  0.035 2.00 0.045 0.030 1.00 16.0-18.0  11.0-14.0b 2.00-3.00        0.10-0.16 
TP317  0.08 2.00 0.045 0.030 1.00 18.0-20.0  11.0-14.0  3.0-4.0         
TP317L  0.035 2.00 0.045 0.030 1.00 18.0-20.0  11.0-15.0  3.0-4.0         
TP321  0.08 2.00 0.045 0.030 1.00 17.0-19.0  9.0-12.0    c     0.1
TP321H  0.04-0.10  2.00 0.045 0.030 1.00 17.0-19.0  9.0-12.0    d      
TP347  0.08 2.00 0.045 0.030 1.00 17.0-19.0  9.0-13.0      e    
TP347H  0.04-0.10  2.00 0.045 0.030 1.00 17.0-19.0  9.0-13.0      f    
TP348  0.08 2.00 0.045 0.030 1.00 17.0-19.0  9.0-13.0      e 0.1  
TP348H  0.04-0.10  2.00 0.045 0.030 1.00 17.0-19.0  9.0-13.0      f 0.1  

Notes:
For small diameter or thin walls or both, where many drawing passes are required, a C maximum of 0.040 % is necessary in grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.500 in. [12.7 mm] in outside diameter and light wall tubes as those less than 0.049 in. [1.20 mm] in average wall thickness (0.044 in. [1.10 mm] in minimum wall thickness).
For welded TP316, TP316N, TP316LN, and TP316H pipe, the Ni range shall be 10.0–14.0 %.
c The Ti content shall be not less than five times the carbon content and not more than 0.70 %.
d The Ti content shall be not less than four times the carbon content and not more than 0.60 %.
The Co content shall be not less than ten times the carbon content and not more than 1.00 %.
The Co content shall be not less than eight times the carbon content and not more than 1.0 %.

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