16Mn seamless steel precision tubing for automotive industry

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Company Information

Zhangjiagang Huadian Import & Export Co., Ltd is a company based in China, we have two factories, one factory manufactures steel tubes and the other factory produces power station equipment.

Jiangsu Dehai Group (Parent Company)
Zhangjiagang Huadian Im &Ex Co., Ltd (Subsidiary)
Zhangjiagang Huagang IndustrialCo.,Ltd (Factory)	Specializes in the production of cold-drawn/cold-rolled precision seamless steel tubes,such as bright oil tubes etc.
Zhangjiagang Huadian Power Equipment Co.,Ltd (Factory)	A manufacturer of power station boiler, industrial boiler, waste heat boiler, refusefired boiler, biomass boiler and the correlated pressure parts integrating the design, manufacture, installation, repair and maintenance

Product Description

DIN2391 high precision of hydraulic steel standard, with high technology DIN pure drawn seamless steel tube of light steel products with a phosphate, with imports of environmental liquid steel for internal and external wall phosphating film formation, black phosphating, through the phosphating film of microporous absorption oily-type rust, both for block as dustproof.

Main features: steel with bright color, black, steel surface color uniformity, consistency is beautiful appearance, good performance, steel rust.

Main purpose: hydraulic system with steel tube, I company of steel exports

Delivery condition and thermal processingPrecision tubes are supplied in condition that is presented in the table below. It is marking for thermal processing according to EN 10305-1.

+C	Cold drawn / hard. After the last cold forming no heat treatment.
+LC	Cold drawn / soft. After the last heat treatment follows the cold drawing there is a light finishing pass.
+SR	Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+A	Annealed. After the last cold drawing process the tubes are annealed in a controlled atmosphere.
+N	Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.

Grade and Chemical Composition(%):

	C max	Si max	Mn	P max	S max
St 35	0.17	0.35	≥0.40	0.025	0.025
St 45	0.21	0.35	≥0.40	0.025	0.025
St 52	0.22	0.55	≤1.60	0.025	0.025

Steel name	C max	Si max	Mn	P max	S max	Al min
E215	0.10	0.05	0.70	0.025	0.025	0.025
E235	0.17	0.35	1.20	0.025	0.025	-
E355	0.22	0.55	1.60	0.025	0.025

Mechanical Properties(Mpa)

Steel grade	BK		BKW		BKS			GBK		NBK
	RmN/mm min	min	RmN/mm min	min	N/mm min	ReH N/mm min	min	N/mm min	min	N/mm min	ReH N/mm min	min
St35	480	6	420	10	420	315	14	315	25	340-470	235	25
St45	580	5	520	8	520	375	12	390	21	440-570	235	21
St52	640	4	580	7	580	420	10	490	22	490-630	355

Steel Grade	Delivery State
	BK		BKW		BKS		NBK
	Tensile Strength(MPa)	Elong ation (%)	Tensile Strength(MPa)	Elong ation (%)	Tensile Strength(MPa)	Elong ation (%)	Tensile Strength(MPa)	Elongation (%)	Yield Point(MPa)
	≥
10	410	6	373	10	335	12	335	24	205
20	510	5	450	8	430	10	410	20	245
35	590	4	550	6	520	8	530	17	315
45	645	4	630	5	610	7	600	14	355

Processing

Standard precision tubes are produced using the cold drawn process. As the semi-finished product we use rolled seamless steel tubes. Standard precision tubes are practically used in all areas of the machine production. Tubes are manufactured from carbon and alloyed steel.

Length
- random length precision tubes in the range of 3 – 7 (9) m
- fixed length with tolerance +/- 500 mm
- exact length with tolerance – 0 / +x mm (x upon agreement)
- maximum length, upon agreement - 18 m

Standards and Application

DIN2391	Seamless Precision Steel Tubes for mechanical and automotive engineering.
EN10305-1	Seamless Steel Tubes for precision applications
ASTM A106/SA106	Seamless Carbon Steel Pipes for High - Temperature Service.
ASTM A179/SA179	Seamless Cold-Drawn Low-Carbon Steel tubes for Heat-Exchanger and Condenser.
ASTM A192/SA192	Seamless Carbon Steel Boiler Tubes for High-Pressure Service.
ASTM A210/SA210	Seamless Medium-Carbon Steel Tubes for Boiler and Super heater.

Delivery Conditions
BK,BKS,BKW,NBK,GBK( As drawn, normalized, annealed, stress-relieved)

As different requirements,It including pickling,etc.

Other Test:
1.Heat Treatment: according to Standard
3.Surface Condition:According to Standard.
4.Grain Size:According to standard