Precision Automotive Steel Tubes

Normal Steel Grade:  

DIN (Standard DIN 2391)ST37 ST44 ST52.3

EN10305 E355

Steel Grade and Chemical Compositions:

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.

Machining on it is available:Honed on Inter Diameter .Cutting to specified short length. 

Related standard :EN10305-4