Chemical Requirements Carbon Alloy Steels used in Piping applications

ASTM A53
Specification for Seamless and Welded Black and Hot-Dipped Galvanized Steel Pipe

Composition, max, %
Element C Mn P S Cu (1) Ni (1) Cr (1) Mo (1) V (1)
Type S (seamless pipe)
Grade A 0.25 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0.08
Grade B 0.30 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08
Type E (electric-resistance-welded)
Grade A 0.25 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0.08
Grade B 0.30 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08
Type F (furnace-welded pipe)
Grade A 0.30 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08

Note:

  1. The total composition for these five elements shall not exceed 1.00%.

ASTM A105
Specification for Carbon Steel Forgings for Piping Applications

Composition, %
Element C Mn P S Si Cu Ni Cr Mo V
0.35
max
0.60-
1.05
0.035
max
0.040
max
0.10-
0.35
0.40
max (1)
0.40
max (1)
0.30
max (1-2)
0.12
max (1-2)
0.08
max

Notes:

  1. The sum of Copper, Nickel, Niobium, Molybdenum and Vanadium shall not exceed 1.00%.
  2. The sum of Niobium and Molybdenum shall not exceed 0.32%.
    Note: For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% Manganese above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%.

ASTM A106
Specification for Seamless Carbon Steel Pipe for High-Temperature Service

Composition, %
Element C
max
Mn P
max
S
max
Si
min
Cr
max (3)
Cu
max (3)
Mo
max (3)
Ni
max (3)
V
max (3)
Grade A 0.25 (1) 0.27-
0.93
0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08
Grade B 0.30 (2) 0.29-
1.06
0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08
Grade C 0.35 (2) 0.29-
1.06
0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08

Notes:

  1. For each reduction of 0.01% below the specified Carbon maximum, an increase of 0.06% Manganese above the specified maximum will be permitted up to a maximum of 1.35%.
  2. Unless otherwise specified by the purchaser, for each reduction of 0.01% below the specified Carbon maximum, an increase of 0.06% Manganese above the specified maximum will be permitted up to a maximum of 1.65%.
  3. These five elements combined shall not exceed 1%.

ASTM A216
Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service

Composition, % max
Grade C Mn P S Si Cu Ni Cr Mo V
WCA
UNS J02502
0.25(1) 0.70(1) 0.04 0.045 0.60 0.30 0.50 0.50 0.20 1.00
WCB
UNS J03002
0.30(2) 1.00(2) 0.04 0.045 0.60 0.30 0.50 0.50 0.20 1.00
WCC
UNS J02503
0.25(3) 1.20(3) 0.04 0.045 0.60 0.30 0.50 0.50 0.20 1.00

Notes:

  1. For each reduction of 0.01% below the specified maximum Carbon content, an increase of 0.04% manganese above the specified maximum will be permitted up to a maximum of 1.10%.
  2. For each reduction of 0.01% below the specified maximum Carbon content, an increase of 0.04% Mn above the specified maximum will be permitted up to a maximum of 1.28%.
  3. For each reduction of 0.01% below the specified maximum Carbon content, an increase of 0.04% manganese above the specified maximum will be permitted to a maximum of 1.40%.

ASTM A234
Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

Composition, %
Grade C Mn P
max
S
max
Si Cr Mo Ni Cu Others
WPB
(1,2,3,4,5)
0.30
max
0.29-
1.06
0.050 0.058 0.10
min
0.40
max
0.15
max
0.40
max
0.40
max
V 0.08
max
WPC
(2,3,4,5)
0.35
max
0.29-
1.06
0.050 0.058 0.10
min
0.40
max
0.15
max
0.40
max
0.40
max
V 0.08
max
WP1 0.28
max
0.30-
0.90
0.045 0.045 0.10-
0.50
0.44-
0.65
WP12 CL1 0.05-
0.20
0.30-
0.80
0.045 0.045 0.60
max
0.80-
1.25
0.44-
0.65
WP12 CL2 0.05-
0.20
0.30-
0.80
0.045 0.045 0.60
max
0.80-
1.25
0.44-
0.65
WP11 CL1 0.05-
0.15
0.30-
0.60
0.030 0.030 0.50-
1.00
1.00-
1.50
0.44-
0.65
WP11 CL2 0.05-
0.20
0.30-
0.80
0.040 0.040 0.50-
1.00
1.00-
1.50
0.44-
0.65
WP11 CL3 0.05-
0.20
0.30-
0.80
0.040 0.040 0.50-
1.00
1.00-
1.50
0.44-
0.65
WP22 CL1 0.05-
0.15
0.30-
0.60
0.040 0.040 0.50
max
1.90-
2.60
0.87-
1.13
WP22 CL3 0.05-
0.15
0.30-
0.60
0.040 0.040 0.50
max
1.90-
2.60
0.87-
1.13
WP5 CL1 0.15
max
0.30-
0.60
0.040 0.030 0.50
max
4.0-
6.0
0.44-
0.65
WP5 CL3 0.15
max
0.30-
0.60
0.040 0.030 0.50
max
4.0-
6.0
0.44-
0.65
WP9 CL1 0.15
max
0.30-
0.60
0.030 0.030 1.00
max
8.0-
10.0
0.90-
1.10
WP9 CL3 0.15
max
0.30-
0.60
0.030 0.030 1.00
max
8.0-
10.0
0.90-
1.10
WPR 0.20
max
0.40-
1.06
0.045 0.050 1.60-
2.24
0.75-
1.25
WP91 0.08-
0.12
0.30-
0.60
0.020 0.010 0.20-
0.50
8.0-
9.5
0.85-
1.05
0.40
max
V 0.18-
0.25
Nb 0.06-
0.10
N 0.03-
0.07
Al 0.02 max(6)
Ti 0.01 max(6)
Zr 0.01 max(6)
WP911 0.09-
0.13
0.30-
0.60
0.020 0.010 0.10-
0.50
8.0-
9.5
0.90-
1.10
0.40
max
V 0.18-
0.25
Nb 0.060-
0.10
N 0.04-
0.09
Al 0.02 max(6)
B 0.0003-
0.006
W 0.90-
1.10
Ti 0.01 max(6)
Zr 0.01 max(6)

Notes:

  1. Fittings made from bar or plate may have 0.35 max carbon.
  2. Fittings made from forgings may have 0.35 max Carbon and 0.35 max Silicon with no minimum.
  3. For each reduction of 0.01% below the specified Carbon maximum, an increase of 0.06% Manganese above the specified maximum will be permitted, up to a maximum of 1.35%.
  4. The sum of Copper, Nickel, Niobium, and Molybdenum shall not exceed 1.00%.
  5. The sum of Niobium and Molybdenum shall not exceed 0.32%.
  6. Applies both to heat and product analyses.