St35 St52 Hydraulic Cylinder Tube

Product Description

PRODUCT: Seamless Precision Steel Tube EN10305 ST35/E35, ST45, ST52/E355

1. Standard: EN 10305-1 / DIN 2391
2. Material: ST35/E35, ST45, ST52/E355
3. OD: 10mm~219.1mm
4. Wall Thickness: 2mm~35mm
5. Application: Precision mechanical part for car and cylinder
6. Delivery condition: NBK (The last cold forming process is followed by annealing above the upper transformation point in a controlled astmosphere. ).
7. Package: In hexagonal shape bundles wrapped with strong steel trip 2MT/Bundle.
St35 St52 Hydraulic Cylinder Tube

Pipe Production

Inspection
Third party inspection that is preferred by new customers are proved to be convincing. Through years' of operation, M/S Chengdu Derbo has established stable contact with world famous third party inspection authorities like BV, SGS, INTERTEK, etc, and more than 5000M.Tons of steel pipes/tubes from Chengdu Derbo have been inspected by them.
Packing

Quality Control:
Our quality control department consists of experienced technicians. These personnel strictly control the whole production procedure, from introduction of raw materials to finish products. They ensure high quality products for our customers.

Chemical composition
Item	Grade		Chemical composition.%
			C max		Si max		Mn		Pmax		S max
St35/E35	1.0308		0.17		0.35		≥0.40		0.025		0.025
St45	1.0408		0.21		0.35		≥0.40		0.025		0.025
St52/E355	1.0508		0.22		0.55		≤1.60		0.025		0.025
The following alloying may be added:Nb≤0.03%,Ti≤0.03%,V≤0.05%,Nb+TI+v≤0.05%
Mechanical properties
Category		Delivery state minimum value
item	grade	Gold finished (hard)(BK)		Gold finished (SOFT)(BKW)		Gold finished and stress-relieved(BKS)			annealed(GBK)		normalized(NBK)
		Rm Mpa	A%	Rm Mpa	A%	Rm Mpa	ReH Mpa	A%	Rm Mpa	A%	Rm Mpa	ReH	A%
1	St35/E235	480	6	420	10	420	315	14	315	25	340~470	235	25
2	St45	580	5	520	8	520	375	12	390	21	440~570	255	21
3	St52/E355	640	4	580	7	580	450f	10	450	22	490~630	355	22