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DIN 2395-1 Rectangular And Square Electric Welded Precision Steel Tubes

his Standard specifies the technical conditions of delivery for rectangular and square welde precision steel tubes according to DIN 2395 Part 1 made of the steel grades listed insection 5. Tubes in accordance with this Standard are manufactured by cold forming andelectric resistance pressure welding. This Standard does not apply to hollow sections for structural steel engineering according to DIN 59 411.

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Description

DIN 2395-1 Rectangular And Square Electric Welded Steel Pipe

Chemical composition

Code number for material	Chemical composition %
Code number for material	C max	P max	S max	N max	Si max	Mn max	Al
UST37.2	0.21	0.065	0.065	0.009	-	-
RST37.2	0.19	0.060	0.060	0.010	-	-
ST37.3	0.19	0.050	0.050	-	-	-
ST44.2	0.24	0.060	0.060	0.010	-	-
ST44.3	0.23	0.050	0.050	-	-	-
M22	0.16-0.23	0.040	0.040	-	0.28	0.40-0.75
QSTE340N	0.18	0.035	0.035	-	9.53	1.56

Mechanical property

Code number for material	Mechanical properties for condition on delivery
	NBK(nominalized)			BKM （welded and sized）
	Tensile strength Rm N/mm²	Yield point ReH N/mm² min	Elongation at rupture A5% min	Tensile strength Rm N/mm²	Yield point ReH N/mm² min	Elongation at rupture A5% min
UST37-2	360-470	235	23	390	250	7
RST37-2
ST37-3
ST44-2	430-540	275	21	460	290	6
ST44-3
M22	420min	290	25	-	-	-
QSTE340N	460-580	340	27	-	-	-

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