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, %
Elt	C	Mn	P	S
Type S (seamless pipe)
Gr. A	0.25	0.95	0.05	0.045
Gr. B	0.3	1.2	0.05	0.045
Type E (electric-resistance-welded)
Gr. A	0.25	0.95	0.05	0.045
Gr. B	0.3	1.2	0.05	0.045
Type F (furnace-welded pipe)
Gr. A	0.3	1.2	0.05	0.045
Composition, max, %
Elt	Cu (1)	Ni (1)	Cr (1)	Mo (1)	V (1)
Type S (seamless pipe)
Gr. A	0.4	0.4	0.4	0.15	0.08
Gr. B	0.4	0.4	0.4	0.15	0.08
Type E (electric-resistance-welded)
Gr. A	0.4	0.4	0.4	0.15	0.08
Gr. B	0.4	0.4	0.4	0.15	0.08
Type F (furnace-welded pipe)
Gr. A	0.4	0.4	0.4	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, %
Elt	C	Mn	P	S	Si
	0.35 max	0.6 1.05	0.035 max	0.04 max	0.1 0.35
Composition, %
Elt	Cu	Ni	Cr	Mo	V
	0.4 max (1)	0.4 max (1)	0.3 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, %
Elt	C max	Mn	P max	S max	Si min
Gr. A	0.25 (1)	0.27 0.93	0.035	0.035	0.1
Gr. B	0.30 (2)	0.29 1.06	0.035	0.035	0.1
Gr. C	0.35 (2)	0.29 1.06	0.035	0.035	0.1
Composition, %
Elt	Cr max (3)	Cu max (3)	Mo max (3)	Ni max (3)	V max (3)
Gr. A	0.4	0.4	0.15	0.4	0.08
Gr. B	0.4	0.4	0.15	0.4	0.08
Gr. C	0.4	0.4	0.15	0.4	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
Gr.	C	Mn	P	S	Si
WCA UNS J02502	0.25 (1)	0.70 (1)	0.04	0.045	0.6
WCB UNS J03002	0.30 (2)	1.00 (2)	0.04	0.045	0.6
WCC UNS J02503	0.25 (3)	1.20 (3)	0.04	0.045	0.6
Composition, % max
Gr.	C	Mn	P	S	Si
WCA UNS J02502	0.25 (1)	0.70 (1)	0.04	0.045	0.6
WCB UNS J03002	0.30 (2)	1.00 (2)	0.04	0.045	0.6
WCC UNS J02503	0.25 (3)	1.20 (3)	0.04	0.045	0.6

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, %
Gr.	C	Mn	P max	S max	Si
WPB (1 2 3 4 5)	0.3 max	0.29 1.06	0.050	0.058	0.1 min
WPC (2 3 4 5)	0.35 max	0.29 1.06	0.050	0.058	0.1 min
WP1	0.28 max	0.3 0.9	0.045	0.045	0.1 0.5
WP12 CL1	0.05 0.2	0.3 0.8	0.045	0.045	0.6 max
WP12 CL2	0.05 0.2	0.3 0.8	0.045	0.045	0.6 max
WP11 CL1	0.05 0.15	0.3 0.6	0.03	0.03	0.5 1.0
WP11 CL2	0.05 0.2	0.3 0.8	0.04	0.04	0.5 1.0
WP11 CL3	0.05 0.2	0.3 0.8	0.04	0.04	0.5 1.0
WP22 CL1	0.05 0.15	0.3 0.6	0.04	0.04	0.5 max
WP22 CL3	0.05 0.15	0.3 0.6	0.04	0.04	0.5 max
WP5 CL1	0.15 max	0.3 0.6	0.04	0.03	0.5 max
WP5 CL3	0.15 max	0.3 0.6	0.04	0.03	0.5 max
WP9 CL1	0.15 max	0.3 0.6	0.03	0.03	1.0 max
WP9 CL3	0.15 max	0.3 0.6	0.03	0.03	1.0 max
WPR	0.2 max	0.4 1.06	0.045	0.05
WP91	0.08 0.12	0.3 0.6	0.02	0.01	0.2 0.5
WP911	0.09 0.13	0.3 0.6	0.02	0.01	0.1 0.5
Composition, %
Gr.	Cr	Mo	Ni	Cu	Others
WPB (1 2 3 4 5)	0.4 max	0.15 max	0.4 max	0.4 max	V 0.08 max
WPC (2 3 4 5)	0.4 max	0.15 max	0.4 max	0.4 max	V 0.08 max
WP1		0.44 0.65
WP12 CL1	0.8 1.25	0.44 0.65
WP12 CL2	0.8 1.25	0.44 0.65
WP11 CL1	1.0 1.5	0.44 0.65
WP11 CL2	1.0 1.5	0.44 0.65
WP11 CL3	1.0 1.5	0.44 0.65
WP22 CL1	1.9 2.6	0.87 1.13
WP22 CL3	1.9 2.6	0.87 1.13
WP5 CL1	4. 6.	0.44 0.65
WP5 CL3	4. 6.	0.44 0.65
WP9 CL1	8. 10.	0.9 1.1
WP9 CL3	8. 10.	0.9 1.1
WPR			1.6 2.24	0.75 1.25
WP91	8. 9.5	0.85 1.05	0.4 max		V 0.18 0.25 Nb 0.06 0.1 N 0.03 0.07 Al 0.02 max (6) Ti 0.01 max (6) Zr 0.01 max (6)
WP911	8. 9.5	0.9 1.1	0.4 max		V 0.18 0.25 Nb 0.06 0.1 N 0.04 0.09 Al 0.02 max (6) B 0.0003 0.006 W 0.9 1.1 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.