JIS G3462 STBA 12 Alloy steel boiler and heat exchanger tubes, ASTM A213, ASTM A209, EN 10216-2, DIN 17175, BS 3059, BS 3606, STBA 12, STBA 13, STBA 20, STBA 22, STBA 23, STBA 24, STBA 25, STBA 26

JIS G3462 Alloy steel boiler and heat exchanger tubes

Standard: JIS G3462
Equivalent Standards: ASTM A209, ASTM A335, EN 10216-2, DIN 17175, BS 3059, BS 3606, ISO 9329-2, ISO 9330-2

Material: STBA 12
Equivalent Material: T1, 243, 1.5423, 16Mo5

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %	Mo, %
0.10-0.20	0.10-0.50	0.30-0.80	0.035 max	0.035 max	0.45-0.65

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Hardness, HRB
380 min	205 min	30 min	80 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 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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