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ASTM A53
ASTM A106
API 5L
ASTM A333
ASTM A335
ASTM A312
ASTM A350
ASTM A105
ASTM A694
ASTM A182
A350 LF2
ASTM A234
ASTM A420
ASTM A860
 A193 B7
A194 2H
A240 GR.410
A312 S31726

ASTM A335 

ASTM A335 - Seamless Ferritic Alloy Steel Pipe for High-Temperature Service

  Chemical Compositions  (max%)
Grade
C Mn P S Si Cr Mo Others
 P1 0.10-0.20 0.30-0.80 0.025 0.025 0.10-0.50 0.44-0.65
 P2 0.10-0.20 0.30-0.61 0.025 0.025 0.10-0.30 0.50-0.81 0.44-0.65
 P5 0.15 0.30-0.60 0.025 0.025 0.50 4.00-6.00 0.45-0.65
 P5b 0.15 0.30-0.60 0.025 0.025 1.00-2.00 4.00-6.00 0.45-0.65
 P5c 0.12 0.30-0.60 0.025 0.025 0.50 4.00-6.00 0.45-0.65 [Note 1]
 P9 0.15 0.30-0.60 0.025 0.025 0.25-1.00 8.00-10.00 0.90-1.10
 P11 0.05-0.15 0.30-0.60 0.025 0.025 0.50-1.00 1.00-1.50 0.44-0.65
 P12 0.05-0.15 0.30-0.61 0.025 0.025 0.50 0.80-1.25 0.44-0.65
 P22 0.05-0.15 0.30-0.60 0.025 0.025 0.50 1.90-2.60 0.87-1.13
 P23 0.04-0.10 0.10-0.60 0.030 0.010 0.50 1.90-2.60 0.05-0.30 V 0.20–0.30
Cb 0.02–0.08
B 0.0010–0.006
N 0.0015 max
Al 0.030 max
W 1.45–1.75
Ni 0.40 max
Ti 0.005–0.060
Ti/N ≥ 3.5[Note 2]
P36 0.10-0.17 0.80-1.20 0.030 0.025 0.25-0.50 0.30 0.25-0.50 Ni 1.00-1.30
Cu 0.50-0.80
Cb 0.015-0.045
V 0.02 max
N 0.02 max
Al 0.050 max
P91 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 8.00-9.50 0.85-1.05 V 0.18–0.25
N 0.030–0.070
Ni 0.40 max
Al 0.02 max
Cb 0.06–0.10
Ti 0.01 max
Zr 0.01 max
P92 0.07-0.13 0.30-0.60 0.020 0.010 5.00 8.50-9.50 0.30-0.60 V 0.15–0.25
N 0.03–0.07
Ni 0.40 max
Al 0.02 max
Cb 0.04–0.09
W 1.5–2.00
B 0.001–0.006
Ti 0.01 max
Zr 0.01 max
P122 0.07-0.14 0.70 0.020 0.010 0.50 10.00-11.50 0.25-0.60 V 0.15–0.30
W 1.50–2.50
Cu 0.30–1.70
Cb 0.04–0.10
B 0.0005–0.005
N 0.040–0.100
Ni 0.50 max
Al 0.020 max
Ti 0.01 max
Zr 0.01 max
P911 0.09-0.13 0.30-0.60 0.020 0.010 0.10-0.50 8.50-9.50 0.90-1.10 V 0.18–0.25
Ni 0.40 max
Cb 0.060–0.10
B 0.0003–0.006
N 0.04–0.09
Al 0.02 max
W 0.90–1.10
Ti 0.01 max
Zr 0.01 max
Notes:
1) Grade P5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a columbium content of 8 to 10 times the carbon content.
2) Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report.

 

Tensile Requirements

  P1, P2 P12 P23 P91

P92, P911 

P36 Class 1

P122  P36 Class 2  All Others 
Tensile strength, min:  MPa   380 415 510 585 620 620 660 415
Yield strength, min:  MPa 205 220 400 415 440 400 460 205

 

Elongation Requirements 

 

All grades except P23, P36 P91, P92, P122, and P911

P23, P91, P92, P122, and P 911

P36
Longitudinal  Transverse Longitudinal  Transverse Longitudinal

Elongation in 2 in. or 50 mm, (or 4D), min, %: Basic minimum elongation for wall 5.16 in. [8 mm] and over in thickness, strip tests,and for all small  sizes tested in full section

30 20 20 ... 15

When standard round 2-in. or 50 mm gage length or proportionally smaller size specimen with the gage length equal to 4DB 4 times the diameter) is used

22 14 20 13 ...

For strip tests a deduction for each 1.32in. [0.8 mm] decrease in wall thickness below in. [8 mm] from the basic minimum elongation of the following percentage points shall be made

1.50 A 1.00 A 1.00 A ... 1.00 A

 

Calculated Minimum Elongation Values - Elongation in 2 in. or 50 mm, min, %

Wall Thickness

All grades except P23, P36, P91,

P92, P122, and P911 P23, P91, P92,

P122, and P911

P23, P91, P92,
P122, and P911
P36
in. mm Longitudinal Transverse Longitudinal Longitudinal
5 ? 16 (0.312) 8 30 20 20 15
9 ? 32 (0.281) 7.2 28 19 19 14
1 ? 4 (0.250) 6.4 27 18 18 13
7 ? 32 (0.219) 5.6 26 ... 17 12
3 ? 16 (0.188) 4.8 24 ... 16 11
5 ? 32 (0.156) 4 22 ... 15 10
1 ? 8 (0.125) 3.2 21 ... 14 9
3 ? 32 (0.094) 2.4 20 ... 13 8
1 ? 16 (0.062) 1.6 18 ... 12 7