En10305-1 E235 E355 +N Cold Drawn Steel Tube

• Customization: Available
• Certification: ISO9001
• Standard Component: Non-Standard Component
• Material: Steel
• Type: Cylinder
• Transport Package: Bundles or Boxes
• Specification: OD2-60mm
• Origin: China
• HS Code: 7304319000

Product Description

Detailed Image:

Standard:

Chemical Composition and Mechanical Performance:

Table 1- Chemical composition
Steel Grade	C%	Si%	Mn%	P%	S%	AL%
E215	≤0.10	≤0.05	≤0.7	≤0.025	≤0.025	≥0.025
E235	≤0.17	≤0.35	0.4-1.2	≤0.025	≤0.025
E255	≤0.21	≤0.35	0.4-1.1	≤0.025	≤0.025
E355	≤0.22	≤0.55	≤1.6	≤0.025	≤0.025

 

Table 2 - Mechanical properties at room temperature
Delivery Condition	BK		BKW		GBK		NBK (N)
Steel Grade	Rm	A %	Rm	A %	Rm	A %	Rm	ReH	A %
	Mpa (Min)	(Min)	Mpa(Min)	(Min)	Mpa(Min)	(Min)	Mpa(Min)	Mpa(Min)	(Min)
E215	430	8	380	12	280	30	290~430	215	30
E235	480	6	420	10	315	25	340~480	235	25
E255	580	5	520	8	390	21	440~570	255	21
E355	640	4	580	7	450	22	490~630	355	22

 

Other Specification:

End Shape	Beveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's requirements
Surface Treatment	Oiled, Galvanized, Phosphate etc
Technique	Cold drawn & cold rolled
Application	1. Automotive and mechanical pipes
	2. Petroleum cracking pipes
	3. High Pressure Boiler Pipe
	4. Low and middle pressure fluid transportation pipeline
	5. Chemical fertilizer equipment pipes
	6. Heat exchanger pipes
Delivery Conditions	1. BK (+C)	No heat treatment after last cold forming process.
	2. BKW (+LC)	After last heat treatment there is a light finishing pass (cold drawing)
	3. BKS (+SR)	After the final cold forming process the tubes are stress relieve annealed.
	4. GBK (+A)	After the final cold forming process the tubes are annealed in a controlled atmosphere.
	5. NBK (+N)	After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.
Package	1. Bundle Packing.
	2. Plain end or vanished as per customer's request.
	3. Wrapped in waterproof paper.
	4. Sackcloth with several steel strips.
	5. Pack in heavy tri-wall boxes.

Production process

Steel bar from steel plant→Physical and chemical inspection→Surface treatment →Cutting → Heating→Hot piercing→Shell storage→Pickling and lubrication→Cold rolling→Heattreatmen  →Pickling and lubrication→Cutting→Punching→Cold drawn→Size inspection→Outer and inner surface cleaning→NBK or GBK→Mechanics inspection→Chemical analysis 

Antlrust oil palnting→print→packing→flnished storage→Dellivery with quality certificate

1.We adopt special techniques and special skill in the acid cleaning process to deal with the   place where it's easy to form fold crevice;
2.Well organized process,especially annealing treatment in a severely technical manner;
3.In respect with lubrication,we adopt the international advanced level treating process in the  world,and put the surface quality of our productsunder strict control in order to prevent causing surface crack.

Certificate:

Certificates:

According to EN 10204 3.1

Inspection Items:

Tensile stength, Yield stength, Elongation, Flattenging, FlaringChemical analysisEddy Current

Test 100%, Size and surface checking 100%Other test item can be arranged as per request