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ASTM A53

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ASTM A53 – Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

 Chemical Compositions（max%）

Grade C Mn P S Cr Cu Mo Ni V
Type S (seamless pipe)
A 0.25 0.95 0.05 0.045 0.4 0.4 0.15 0.4 0.08
B 0.3 1.2 0.05 0.045 0.4 0.4 0.15 0.4 0.08
Type E (electric-resistance-welded)
A 0.25 0.95 0.05 0.045 0.4 0.5 0.15 0.4 0.08
B 0.3 1.2 0.05 0.045 0.4 0.5 0.15 0.4 0.08
Type F (furnace-welded pipe)
A 0.3 1.2 0.05 0.045 0.4 0.4 0.15 0.4 0.08

Note:
The sum of Cu, Ni, Cr, Mo and V shall not exceed 1.00%.

Tensile Requirements (min)

Grade    Tensile strength psi [MPa]   Yield strength psi [MPa] Elongation in 2 in. or 50 mm, %
A 48000 [330] 30000 [205] (Note 1, 2)
B 60000 [415] 35000 [240]

Note:
1)The minimum elongation in 2 in. [50 mm] shall be that determined by the following equation:
e = 625 000 [1940] A0.2/U 0.9 
where:
e = minimum elongation in 2 in. or 50 mm in percent, rounded to the nearest percent,
A = the lesser of 0.75 in.2 [500 mm2] and the cross-sectional area of the tension test specimen,
calculated using the specified outside diameter of the pipe, or the nominal width of the tension test specimen and
the specified wall thickness of the pipe, with the calculated value rounded to the nearest 0.01 in.2 [1 mm2], and
U = specified minimum tensile strength, psi [MPa].
2)See below table for the minimum elongation values that are required for various combinations of tension test specimen size and specified minimum tensile strength.

Area, A, mm2 Specified Wall Thickness, mm Elongation in 50 mm, min, %
Tension Test Specimen Specified Minimum Tensile Strength, Mpa
19-mm Specimen 25-mm Specimen 38-mm Specimen 330 415
500 and greater 26.3 and greater 20.0 and greater 13.2 and greater 36 30
480-499 25.3-26.2 19.2-19.9 12.7-13.1 36 30
460-479 24.2-25.2 18.4-19.1 12.1-12.6 36 29
440-459 23.2-24.1 17.6-18.3 11.6-12.0 36 29
420-439 22.1-23.1 16.8-17.5 11.1-11.5 35 29
400-419 21.1-22.0 16.0-16.7 10.6-11.0 35 29
380-399 20.0-21.0 15.2-15.9 10.0-10.5 35 28
360-379 19.0-19.9 14.4-15.0 9.5-9.9 34 28
340-359 17.9-18.9 13.6-14.3 9.0-9.4 34 28
320-339 16.9-17.8 12.8-13.5 8.5-8.9 34 27
300-319 15.8-16.8 12.0-12.7 7.9-8.4 33 27
280-299 14.8-15.7 11.2-11.9 7.4-7.8 33 27
260-279 13.7-14.7 10.4-11.1 6.9-7.3 32 26
240-259 12.7-13.6 9.6-10.3 6.4-6.8 32 26
220-239 11.6-12.6 8.8-9.5 5.8-6.3 31 26
200-219 10.5-11.5 8.0-8.7 5.3-5.7 31 25
190-199 10.0-10.4 7.6-7.9 5.0-5.2 30 25
180-189 9.5-9.9 7.2-7.5 4.8-4.9 30 24
170-179 9.0-9.4 6.8-7.1 4.5-4.7 30 24
160-169 8.4-8.9 6.4-6.7 4.2-4.4 29 24
150-159 7.9-8.3 6.0-6.3 4.0-4.1 29 24
140-149 7.4-7.8 5.6-5.9 3.7-3.9 29 23
130-139 6.9-7.3 5.2-5.5 3.5-3.6 28 23
120-129 6.3-6.8 4.8-5.1 3.2-3.4 28 23
110-119 5.8-6.2 4.4-4.7 2.9-3.1 27 22
100-109 5.3-5.7 4.0-4.3 2.7-2.8 27 22
90-99 4.8-5.2 3.6-3.9 2.4-2.6 26 21
80-89 4.2-4.7 3.2-3.5 2.1-2.3 26 21
70-79 3.7-4.1 2.8-3.1 1.9-2.0 25 21
60-69 3.2-3.6 2.4-2.7 1.6-1.8 24 20
50-59 2.7-3.1 2.0-2.3 … 24 19
40-49 2.1-2.6 1.6-1.9 … 23 19
30-39 1.6-2.0 … … 22 18

 

ASTM A106

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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 000A0.2 / U 0.9 for SI units, and
e = 1940A0.2 / 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

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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

 

Photos of Buttwelding Fittings

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butt welding fittings

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

Types of Buttwelding Fittings

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butt welding fittings

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