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Standard: ASTM A249/ASME SA249 Material: 304, 304L, 316, 316L,321 Size: OD (15.9-139.8mm) x WT (1.2-13mm) Inspection items: Chemical Composition; Size; Mechanical Properties; Flattening Test; Hydrostatic Test or Eddy current test or Ultrasonic test; Surface quality; Grain size analysis; Hardness; flanging test; Bending test Negotiated items: Intercrystalline corrosion; Stabilization heat treatment; BKS tube; Air pressure test under water; Minimal wall thickness Application: Superheater, Heat Exchanger, etc. |
Chemical Composition
|
Material |
ASTM A249 Chemical Composition % Max |
||||||||||
|
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
NB |
Nb |
Ti |
|
|
TP304 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-11.0 |
… |
… |
…. |
… |
|
TP |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-12.0 |
… |
… |
… |
… |
|
TP316 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
10.0-14.0 |
2.00-3.00 |
… |
… |
… |
|
TP |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
10.0-14.0 |
2.00-3.00 |
… |
… |
… |
|
TP321 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-12.0 |
… |
0.10 |
… |
5(C+N)-0.70 |
|
ASTM A249 Mechanical Properties |
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|
Material |
Heat treatment |
Temperure F(C) Min. |
Tensile Strength Ksi (MPa), Min. |
Yield Strength Ksi (MPa), Min. |
Elongation %, Min. |
Hardness Max. |
|
Rockwell |
||||||
|
TP304 |
Solution |
1900 (1040) |
75(515) |
30(205) |
35 |
90HRB |
|
TP |
Solution |
1900 (1040) |
70(485) |
25(170) |
35 |
90HRB |
|
TP316 |
Solution |
1900(1040) |
75(515) |
30(205) |
35 |
90HRB |
|
TP |
Solution |
1900(1040) |
70(485) |
25(170) |
35 |
90HRB |
|
TP321 |
Solution |
1900(1040)F |
75(515) |
30(205) |
35 |
90HRB |
|
OD Tolerance |
WT Tolerance |
Length Tolerance |
||
|
OD, mm |
Tolerance |
+/-10% |
OD, mm |
Length Tolerance |
|
<25.4 |
±0.10 |
<50.8 |
+3/-0 |
|
|
25.4 - ≤38.1 |
±0.15 |
≥50.8 |
+5/-0 |
|
|
>38.1 -<50.8 |
±0.20 |
|
|
|
|
50.8 -<63.5 |
±0.25 |
|
|
|
|
63.5 -<76.2 |
±0.30 |
|
|
|
|
76.2 - ≤101.6 |
±0.38 |
|
|
|
|
>101.6 - ≤190.5 |
+0.38/-0.64 |
|
|
|
|
>190.5 - ≤228.6 |
+0.38/-1.14 |
|
|
|