Carbon Steel Pipes
JIS G3461 STB340
JIS G3461 STB410
JIS G3461 STB510
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JIS G3461 Carbon steel boiler and heat exchanger tubes
Standard: JIS G3461
Equivalent Standards: ASTM A210, EN 10216-2, DIN 17175, BS 3059 Part II, NF A 49-213, NBR 5592, UNI 5462-64, ISO 9329-2, ISO 9330-2
Material: STB410
Equivalent Materials: SA210A1, C18, CFS 430, 20G
Chemistry Composition
C, %
Mn, %
Si, %
P, %
S, %
0.32 max
0.30-0.80
0.35 max
0.035 max
0.035 max
Mechanical Properties
Tensile Strength , MPa
Yield Strength , MPa
Elongation, %
Hardness, HRB
410 min
255 min
25 min
79 max
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
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
JIS G3461 specifies the carbon steel tubes used in chemical and petroleum industry, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc.
Manufacture: tubes shall be made by the seamless process and shall be either hot-finished or cold-finished, as specified.
Heat Treatment: hot-finished tubes need not be heat treated. Cold finished tubes shall be heat treated after the final cold-finishing at a temperature of 1200°F [650°C] or higher.
Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, hardness test, NDT, surface inspection and dimension check.
Length: 5000mm; 6000mm; 9000mm; 12000mm; and so on.
Max length: 30000mm, U bending can be offered, also see the fin tubes.
Keyword: heat exchanger steel tubes, JIS G3461, STB340, STB410, STB510
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