Seamless cold drawn/rolling steel tubes Steel tubes for precision applications.  Technical delivery conditions. 

 

 

Size range: O.D.:6-350mm     W.T.:1-30mm      L:max12000mm

 

Steel Grade and Chemical Compositions:
Steel Grade		C	Si	Mn	P	S	Al
Steel name	Steel number	max	max	max	max	max	min
E215	1.0212	0.10	0.05	0.70	0.03	0.025	0.025
E235	1.0308	0.17	0.35	1.20	0.03	0.025	-
E355	1.0580	0.22	0.55	1.60	0.03	0.025	-

 

Mechanical properties at room temperature
Steel grade		Minimum values for the delivery condition
Steel name	steel nubmer	(+Cc)		(+LCc)		(+SR)			(+Ad)		(+N)  NBK
		Rm Mpa	A %	Rm Mpa	A %	Rm Mpa	ReH Mpa	A %	Rm Mpa	A %	Rm Mpa	ReH Mpa	A %
E215	1.0212	430	8	380	12	380	280	16	280	30	290-430	215	30
E235	1.0308	480	6	420	10	420	350	16	315	25	340-480	235	25
E355	1.0580	640	4	580	7	580	450f	10	450	22	490-630	355	22
aRm: tensile strength;  ReH: upper yield strength; A: elongation after fracture
b 1Mpa=1N/mm2
c Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile strength.
For calculation purposes the following relations are recommended:
for delivery condition +C: ReH ≥0.8 Rm
for delivery condition +LC: ReH ≥0.7 Rm
d For calclulation purposes the following relation is recommended:ReH≥0.5Rm
e For tubes with outside diameter ≤30mm and wall thickness ≤3mm the ReH minimim values are 10Mpa lower than the values given in this Table
f For tubes with outside diameter＞160mm: ReH≥420Mpa

 

Note: Special steel grade is also available, according to customer request.

 

Applications: for Auto industry/for machinery use/Oil Cylinder Tube/Motorcyle shock absorber Auto shock absorber innder cylinder/Telescopic Cylinders