JIS G3461 STB410 Carbon steel boiler and heat exchanger tubes, heat exchanger steel tubes, STB340, STB410, STB510, SA192

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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