Material Specifications for Butt-Welding Fittings (ASTM) |
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ASTM A403/A403M-00a |
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Wrought Austenitic Stainless Steel Piping Fittings |
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Grade |
Composition, % |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
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WP 304 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
8.0-11.0 |
18.0-20.0 |
- |
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WP 304L |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
8.0-13.0 |
18.0-20.0 |
- |
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WP 316 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
10.0-14.0 |
16.0-18.0 |
2.00-3.00 |
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WP 316L |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
10.0-16.0 |
16.0-18.0 |
2.00-3.00 |
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GENERAL NOTE: |
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All values are maximum unless otherwise indicated. |
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Tensile and Elongation Requirements |
WP304, WP316 |
WP304L,
WP316L |
Yield
Strength, min, ksi [MPa] |
30[205] |
25[170] |
Tensile Strength, min, ksi [MPa] |
75[515] |
70[485] |
Elongation (1) |
Longitudinal |
28 |
28 |
Transverse |
20 |
20 |
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NOTE: (1) Standard round specimen, or small
proportional specimen, or strip-type specimen, min % in 4D. |
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ASTM A420/A420M-00 |
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Piping
Fittings of Wrought Carbon Steel and Alloy Steel for |
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Low Temperature Service |
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Grade |
Composition, % |
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C |
Mn |
P |
S |
Si |
Ni |
Cu |
Cr |
Mo |
V |
Nb |
WPL6(1)(2) |
0.30 |
0.60-1.35 |
0.035 |
0.040 |
0.15-0.30 |
0.40 |
0.40 |
0.30 |
0.12 |
0.08 |
0.02 |
WPL9 |
0.20 |
0.40-1.06 |
0.030 |
0.030 |
- |
1.60-2.24 |
0.75-1.25 |
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- |
- |
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GENERAL NOTE: |
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All values are maximum unless otherwise indicated. |
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NOTES: |
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(1) For each reduction of 0.01% C below 0.30%, an increase of
0.05% |
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Mn above 1.06% will be permitted, up to a maximum of 1.35%. |
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(2) Fittings made from forgings may have 1.35% max Mn. |
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Tensile Requirements |
WPL6 |
WPL9 |
Tensile Strength, min, ksi [MPa] |
60-85[415-585] |
63-88[435-610] |
Yield Strength, min, ksi [MPa] |
35[240] |
46[315] |
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Wall thickness |
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Elongation Requirements |
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in |
mm |
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Longitudinal |
Transverse |
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WPL6 |
WPL9 |
WPL6 |
WPL9 |
Standard round
specimen, or small |
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22 |
20 |
12 |
- |
proportional specimen, min % in 4D |
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Rectangular
Specimen for wall thickness |
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³0.312 |
³7.94 |
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30 |
28 |
16.5 |
18 |
0.312in
[7.94mm] and over, and for all small |
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sizes tested in full section; min % in 2in[50mm] |
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Rectangular
Specimen for wall thickness |
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0.281 |
7.14 |
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28.5 |
26.5 |
15.5 |
17.0 |
less than 0.312in
[7.94mm]; min % in |
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0.250 |
6.35 |
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27.0 |
25.0 |
14.5 |
16.0 |
2 in[50mm]
(0.5in [12.7mm] wide specimen) |
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0.219 |
5.56 |
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25.5 |
23.5 |
- |
- |
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0.188 |
4.76 |
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24.0 |
22.0 |
- |
- |
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0.156 |
3.97 |
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22.5 |
20.5 |
- |
- |
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0.125 |
3.17 |
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21.0 |
19.0 |
- |
- |
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0.094 |
2.38 |
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19.5 |
17.5 |
- |
- |
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0.062 |
1.59 |
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18.0 |
16.0 |
- |
- |
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Where the wall thickness lies between two values above, the min
elongation value is determined |
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by the following equations: |
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WPL6 |
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WPL9 |
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Longitudinal |
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E=48t+15.00 |
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E=48t+13.00 |
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Transverse |
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E=32t+6.50 |
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E=32t+8.00 |
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E = elongation in 2in[50mm], % |
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t = actual thickness of specimen, in[mm] |
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