JIS G3429 STH 11 Seamless Steel Tubes for High Pressure Gas Cylinder, STH 11, STH 12, STH 21, STH 22, STH 31

JIS G3429 Seamless Steel Tubes for High Pressure Gas Cylinder

Standard: JIS G3461
Equivalent Standards: ASTM A192, EN 10216-1, EN 10216-2, DIN 17175, BS 3059 Part II, NF A 49-213, NBR 5594, GB 3087, GB 5310, ISO 9329-2, ISO 9330-2

Material: STB340
Equivalent Materials: 1010, St35.8, 360, P195TR1 (1.0107), P195TR2 (1.0108), P195GH, 10#, 12G, SA192, 0.1-0.15C

Chemistry Composition

C, %	Mn, %	Si, %	P, %	S, %
0.18 max	0.30-0.60	0.35 max	0.035 max	0.035 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength , MPa	Elongation, %	Hardness, HRB
340 min	175 min	35 min	77 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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