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EN 10305-1 Pipe,GB3639,Mechanical Seamless Pipe

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QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association

EN 10305-1 Pipe,GB3639,Mechanical Seamless Pipe

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Main Material and Mechanical Properties:

The steel grades of raw material used in our company are mainly St35、St37.4(10#)、St45 (20#)、St55（35#）、Ck45（45#）、St52（16Mn）、lCrl8Ni9Ti, etc. was produced by Shanghai Baosteel Group.

EN 10305-1 Pipe,GB3639 Mechanical Pipe

The steel tube produced by our company has excellent mechanical properties and performance in process. The steel tube is able to stand the high pressure, impact and particularly suitable for application of hydraulic machinery and automotive fabrication. The tube can be cold bent at any angle. No crack will be happened after flaring and flattening for the industry, which the bending and forming is required in process.

EN 10305-1 Mechanical properties

		The final delivery condition	Cold drawn (Mandatory) +C		Cold drawn (Soft)+LC		Cold Drawn and Stress Release (+SR)			Anneal (+A)		Normalizing (+N)
			Tensile	Elongation	Tensile	Elongation	Tensile	Yield point	Elongation	Tensile	Elongation	Tensile	Yield point	Elongation
Steel grade	Material number		No less than
Steel grade	Material number		Rm	A5	Rm	A5	Rm	ReH	A5	Rm	A5	Rm	ReH2)	A5
			N/mm2	%	N/mm2	%	N/mm2	N/mm2	%	N/mm2	%	N/mm2	N/mm2	%
E235	1.0308		480	6	420	10	420	350	16	315	25	340~480	235	25
E255	1.0408		580	5	520	8	520	375	12	390	21	440~570	255	21
E355	1.0580		640	4	580	7	580	450	10	450	22	490~630	355	22

GB3639 Mechanical properties

	The final delivery condition	Cold drawn (Mandatory) BK1）		Cold drawn (Soft) BKW1）		Cold Drawn and Stress Release (BKS)		Anneal (GBK)1）		Normalizing (NBK)1）
		Tensile	Elongation	Tensile	Elongation	Tensile	Elongation	Tensile	Elongation	Tensile	Yield point	Elongation
Steel grade		No less than
Steel grade		Rm	A5	Rm	A5	Rm	A5	Rm	A5	Rm	ReH2)	A5
		N/mm2	%	N/mm2	%	N/mm2	%	N/mm2	%	N/mm2	N/mm2	%
10		410	6	375	10	335	12	335	24	335	205	24
20		510	5	450	8	430	10	390	20	410	245	20
35		590	4	550	6	520	8	510	17	530	315	17
45		645	4	630	5	610	7	590	14	600	355	14