EN 10305/EN 10305-4								DIN2391
Chemical composition %(max)	Steel Gr,	C	Si	Mn	P		S	Chemical composition %(max)	Steel Gr.	C	Si	Mn	P	S
	E215	0.10	0.35	0.70	0.025		0.025		ST 35	0.10	0.35	0.40	0.025	0.025
	E235	0.17	0.35	1.20	0.025		0.025		ST 37	0.17	0.35	1.20	0.025	0.025
	E355	0.22	0.55	1.60	0.025		0.025		ST 52	0.22	0.55	1.60	0.025	0.025
Delivery Condition								Delivery Condition
+C	No heat treatment after the final cold drawing process							BK	Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
+LC	After the final heat treatment there’s a suitable drawing pass							BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. Bending, expanding)
+SR	After the final cold drawing process there’s a stress relief heat treatment in controlled atmosphere							BKS	Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree
+A	After the cold drawing process the tubes are annealed in a controlled atmosphere							GBK	The last cold forming process is followed by a nnealing in a controlled atmosphere
+N	After the final cold drawing operation the tubes are normalized in a controlled atmosphere							NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere
Mechanical Properties								Mechanical Properties
	Steel Gr.	+C	+LC	+SR	+A	+N			Steel Gr.	BK	BKW	BKS	GBK	NBK
Tensile Strength (Rm)(MPa) Min	E215	430	380	380	280	290-430		Tensile Strength (Rm)(MPa) Min	ST 30AL	430	380	380	280	290-430
	E235	480	420	420	315	340-480			ST 37	440	370	380	315	340-470
	E355	640	580	580	450	490-630			ST 52	640	580	580	450	490-630
Yield Strength (ReH)(MPa) Min	E215	≥0.8Rm	≥0.7Rm	280	≥0.5Rm	215		Yield Strength (ReH)(MPa) Min	ST 30AL	≥0.8 Rm	≥0.7 Rm	280	≥0.5 Rm	215
	E235	≥0.8Rm	≥0.7Rm	280	≥0.5Rm	235			ST 37	≥0.8 Rm	≥0.7 Rm	280	≥0.5 Rm	235
	E355	≥0.8Rm	≥0.7Rm	450	≥0.5Rm	355			ST 52	≥0.8 Rm	≥0.7 Rm	420	≥0.5 Rm	355
Elongation %	E215	8	12	16	30	30		Elongation %	ST 30AL	6	10	16	25	25
	E235	6	10	16	25	25			ST 37	6	10	16	25	25
	E355	4	7	10	22	22			ST 52	4	7	10	22	22
a. ST 30Al with Aluminium composition min 0.025%
OD TOLERANCE
OVER		UP TO AND INCLUDING			TOLERANCE
MM		MM			MM+/-
		30			0.10
50		70			0.15
WALL TOLERANCE
The tolerance including ecentricity, shall be +/- 10% with a minimum of +/- 0.10mm

STRAIGHTNESS
Tubes shall not depart from straightness by more than 1.5 mm/m

Hydraulic Cylinder Honed Tube , Mechanical Tubing Corrosion Resistant

Chrome Piston Rod

Hollow Piston Rod

Hydraulic Piston Rods

Hard Chrome Plated Rod

Hard Chrome Plated Bar

Hollow Metal Rod

Hollow Round Bar

Induction Hardened Rod

Induction Hardened Bar

Steel Guide Rod

Custom Tie Rod

Honed Tube

Pneumatic Piston Rod

Hydraulic Cylinder Rod

Precision Steel Shaft

Micro Alloy Steel

Hydraulic Cylinder Honed Tube , Mechanical Tubing Corrosion Resistant

honed hydraulic cylinder tubing

hydraulic cylinder rod material

stainless hydraulic tubing