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

 Chemical Compositions (max%)

Grade	C	Mn	P	S	Si	Cr	Cu	Mo	Ni	V
A	0.25	0.27-0.93	0.035	0.035	≥0.10	0.40	0.40	0.15	0.40	0.08
B	0.30	0.29-1.06	0.035	0.035	≥0.10	0.40	0.40	0.15	0.40	0.08
C	0.35	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 C maximum, an increase of 0.06 % Mn above the specified maximum will be permitted up to a maximum of 1.35 %.
2) The sum of Cu, Ni, Cr, Mo and V shall not exceed 1.00%.

Tensile Requirements

Tensile Requirements	Grade A		Grade B		Grade C
Tensile strength, min, psi [MPa]	48 000 [330]		60 000 [415]		70 000 [485]
Yield strength, min, psi [MPa]	30 000 [205]		35 000 [240]		40 000 [275]
	Longitudinal	Transverse	Longitudinal	Transverse	Longitudinal	Transverse
Elongation in 2 in. [50 mm], min, %:
Basic minimum elongation transverse strip tests, and for all small sizes tested in full section	35	25	30	16.5	30	16.5
When standard round 2-in. [50-mm] gage length test specimen is used	28	20	22	12	20	12
For longitudinal strip tests	A		A		A
For transverse strip tests, a deduction for each 1.32-in. [0.8-mm] decrease in wall thickness below 5⁄16 in. [7.9 mm] from the basic minimum elongation of the following percentage shall be made		1.25		1.00		1.00

Note:

The minimum elongation in 2 in. [50 mm] shall be determined by the following equation:

e = 625 000A^0.2 / U ^0.9 for SI units, and
e = 1940A^0.2 / U ^0.9 for inch-pound units,

where:

e = minimum elongation in 2 in. [50 mm], %, rounded to the nearest 0.5 %,
A = cross-sectional area of the tension test specimen, in.² [mm²], based upon specified outside diameter or nominal specimen width and
specified wall thickness,rounded to the nearest 0.01 in.² [1 mm²]. (If the area thus calculated is equal to or greater than 0.75 in.² [500 mm²], then the value 0.75 in.² [500 mm²] shall be used.), and
U = specified tensile strength, psi [MPa].

ASTM A105 – Carbon Steel Forgings for Piping Applications

 

Chemical Compositions (max, %)

C	Mn	P	S	Si	Cr	Cu	Mo	Ni	V
0.35	0.60- 1.05	0.035	0.040	0.1- 0.35	0.30	0.40	0.12	0.40	0.08

Notes:
1) For each reduction of 0.01% below the specified C maximum(0.35%), an increase of 0.06% Mn above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%.
2) The sum of Cu, Ni, Cr, Mo and V shall not exceed 1.00%.
3) The sum of Cr and Mo shall not exceed 0.32%.

 

Mechanical Properties (min)

Tensile psi(MPa)	Yield psi(MPa)	Elongation %	Reduction %	Hardness (HB)
70 000（485）	36 000（250）	22	30	≤187

 

1. Elbow 90°   long radius
2. Elbow 45°
3. Elbow 90°   short radius
4. Elbow 180° long radius
5. Elbow 180° short radius
6. Tee straight
7. Tee reducing
8. Reducer concentric
9. Reducer eccentric
10. End cap
11. Lap joint Stub End

1. Elbow 90°   long radius  
2. Elbow 45°  
3. Elbow 90°   short radius
4. Elbow 180° long radius   
5. Elbow 180° short radius
6. Tee straight  
7. Tee reducing
8. Reducer concentric  
9. Reducer eccentric
10. End cap  
11. Lap joint Stub End

Reference standards
ASME B16.5   Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24
ASME B16.47  Large Diameter Steel Flanges: NPS 26 Through NPS 60
ASME B16.48  Line blanks
ASME B16.36  Orifice Flanges