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JIS G3462 Alloy steel boiler and heat exchanger tubes |
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Standard: JIS G3462
Equivalent Standards: ASTM A213, ASTM A209, EN 10216-2, DIN 17175, BS 3059, BS 3606, ISO 9329-2, ISO 9330-2, BS 3604, DIN 17176 |
Material: STBA 22
Equivalent Material: T12, 13CrMo44, 620, 15CrMo, 620-460, 1.7335, 13CrMo4-5, P12 |
Chemistry Composition |
C, % |
Si, % |
Mn, % |
P, % |
S, % |
Cr, % |
Mo, % |
0.15 max |
0.50 max |
0.30-0.60 |
0.035 max |
0.035 max |
0.80-1.25 |
0.45-0.65 |
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Mechanical Properties |
Tensile Strength , MPa |
Yield Strength, MPa |
Elongation, % |
Hardness, HRB |
410 min |
205 min |
30 min |
85 max |
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Outside Diameter & Tolerance |
Hot rolled |
Outside Diameter, mm |
Tolerance, mm |
OD<100 |
+0.4/-0.8 |
100≤OD<160 |
+0.4/-1.2 |
160≤OD<200 |
+0.4/-1.8 |
OD≥200 |
+0.4/-2.4 |
Cold Drawn |
Outside Diameter, mm |
Tolerance, mm |
OD<25 |
±0.10 |
25≤OD<40 |
±0.15 |
40≤OD<50 |
±0.20 |
50≤OD<60 |
±0.25 |
60≤OD<80 |
±0.30 |
80≤OD<100 |
±0.40 |
100≤OD<120 |
+0.40/-0.60 |
120≤OD<160 |
+0.40/-0.80 |
160≤OD<200 |
+0.40/-1.20 |
OD≥200 |
+0.40/-1.60 |
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Wall thickness & Tolerance |
Hot rolled |
Outside Diameter, mm |
Tolerance, % |
OD<100, WT<2.0 |
- |
OD<100, 2.0≤WT<2.4 |
+40/-0 |
OD<100, 2.4≤WT<3.8 |
+35/-0 |
OD<100, 3.8≤WT<4.6 |
+33/-0 |
OD<100, WT≥4.6 |
+28/-0 |
OD≥100, WT<2.0 |
- |
OD≥100, 2≤WT<2.4 |
- |
OD≥100, 2.4≤WT<3.8 |
+35/-0 |
OD≥100, 3.8≤WT<4.6 |
+33/-0 |
OD≥100, WT≥4.6 |
+28/-0 |
Cold Drawn |
Outside Diameter, mm |
Tolerance, % |
OD<40, WT<2.0 |
+0.40mm/-0mm |
OD<40, WT≥2.0 |
+20/-0 |
OD≥40 |
+22/-0 |
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JIS G3462 specifies alloy steel tubes used for heat transfer, for instance, water tubes, smoke pipe, superheater tube, air preheater tube, heat exchanger tubes, condenser tubes which are widely used in the chemical and petroleum industry. JIS G3462 usually applies to tubes with an outer diameter of 15.9mm to 139.8mm. |
Manufacture: tubes to JIS G3462 shall be manufactured by hot rolled or cold drawn process.
Heat Treatment: full or isothermal anneal, normalize and temper.
Inspection & Test: chemistry composition analysis, tensile test, hardness test, flattening test, flaring test, NDT, surface inspection and dimension check. |
Length: 5800mm; 6000mm; 6096mm; 7315mm; 11800mm; 12000mm; and so on.
Max developed length: 30 meters, also U bending, finning, studded process can be provided.
Option: shot blasting on the outside surface to remove mill scale, make the surface matte colour; surface polishing as preparation work done for further processing, for instance finning. |
Keyword: JIS G3462, ASTM A213, ASTM A209, EN 10216-2, DIN 17175, BS 3059, BS 3606, Heat Exchanger Tubes |
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