DIN2391 Precision Seamless Steel Pipe

What is the DIN 2391 specification?
The chemical composition of DIN 2391 precision pipes is carbon, silicon, manganese, phosphorus and sulfur. DIN 2391 mild steel pipes are available in outside diameters from 4 mm to 60 mm. DIN 2391 seamless round tubes have excellent mechanical properties and can be easily used in flanging and bending operations.

What is DIN 2391 seamless steel pipe used for?
DIN 2391 mechanical pipes are widely used in construction, oil and gas refineries, transportation, construction, petrochemical industry, automotive and mechanical engineering applications.

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DIN 2391 seamless pipe specifications

Standard: DIN 2391

Size: 6mm-350mm.

W.T.: 0.8mm-50mm.

Shape: Round.

Production type: Cold drawn or cold rolled.

Length: Single random length/ Double random length or as customer's actual request max length is 10m.

Grade: St30 Si, St30 Al, St35, St45, St52.

DIN 2391 High precision hydraulic steel pipe Chemical Composition

Standard	Grade		Chemical Components (%)
	Symbol	Material No.	C	Si	Mn	P	S
DIN2391	St 30 Si	1.0211	≤0.10	≤0.10	≤0.55	≤0.025	≤0.025
	St 30 Al	1.0212	≤0.10	≤0.05	≤0.55	≤0.025	≤0.025
	St 35	1.0308	≤0.17	≤0.35	≥0.40	≤0.025	≤0.025
	St 45	1.0408	≤0.21	≤0.35	≥0.40	≤0.025	≤0.025
	St 52	1.058	≤0.22	≤0.55	≤1.60	≤0.025	≤0.025

DIN 2391 Seamless precision pipe Mechanical Properties.

Mechanical properties at room temperature
Steel Grade		Minimum values for the delivery condition
Steel Name	Steel Number	BK		BKW		BKS			GBK		NBK
		Rm	A %	Rm	A %	Rm	ReH	A %	Rm	A %	Rm	ReH	A %
		Mpa		Mpa		Mpa	Mpa		Mpa		Mpa	Mpa
St 30 Si	1.0211	430	8	380	12	380	280	16	280	30	290 to 420	215	30
St 30 Al	1.0212	430	8	380	12	380	280	16	280	30	290 to 420	215	30
St 35	1.0308	480	6	420	10	420	315	14	315	25	340 to 470	235	25
St 45	1.0408	580	5	520	8	520	375	12	390	21	440 to 570	255	21
St 52	1.0580	640	4	580	7	580	420	10	490	22	490 to 630	355	22

DIN2391 seamless steel tube

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