Tubes according to EN 10305-1

EN 10305 Seamless cold drawn precision steel tubes for mechanical applications and for hydraulic and pneumatic power systems.

Typical fields of application are in the automotive, furniture and general engineering industries.

Steel tubes for precision applications-Technical delivery conditions-Part 1: Seamless cold drawn tubes.

Seamless Precision Steel Tubes according to EN 10305-1

Standard and Steel grade:

• EN10305-1 E215
• EN10305-1 E235
• EN10305-1 E355

Feature:

High precision and high brightness, the inner and outer surface of the tubes have high cleanness without oxid mechanical properties of the final tubes also come out excellent promising no leakage under high pressure no deformation after cold-bent and no cracks when flaring and flattening ensuring the efficient operation in all service.

Chemical analysis [%] of  EN10305-1

Steel grade	C	Si	Mn	P	S	V	Nb	Al
EN10305-1 E215	≤0,10	≤0,05	≤0,70	≤0,025	≤0,025	-	-	≥0,025
EN10305-1 E215	≤0,17	≤0,35	≤1,20	≤0,025	≤0,025	-	-	-
EN10305-1 E215	≤0,22	≤0,55	≤1,60	≤0,025	≤0,025	-	-	-

 Mechanical properties of  EN10305-1

Steel grade	+C		+LC		+SR			+A		+N
	Rm	A	Rm	A	Rm	ReH	A	Rm	A	Rm	ReH	A
	MPa	%	MPa	%	MPa	MPa	%	MPa	%	MPa	MPa	%
E215	430	8	380	12	380	280	16	280	30	290 – 430	215	30
E235	480	6	420	10	420	350	16	315	25	340 – 480	235	25
E355	640	4	580	7	580	450	10	450	22	490 – 630	355	22

Quality grade

The tubes are supplied in the following quality grades :

A) precision steel tubes intended primarily for mechanical stressing, without any particular quality requirement and without acceptance test certificate.
B) precision steel tubes intended primarily for mechanical stressing, with special quirement and exclusively with acceptance test certificate.
C) precision steel tubes with special requirement according to section 12. Theses requirements and corresponding tests must be agreed, with the customer having to specify his requirements at the time of enquiry and on ordering.

Condition on delivery:

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.