E255 Cylinder Seamless Precision Steel Tube For Machine Structural-China Changzhou Joyruns Steel Tube CO.,LTD

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E255 Cylinder Seamless Precision Steel Tube For Machine Structural

Product Details:

Place of Origin:	CHANGZHOU, CHINA
Brand Name:	Joyruns
Certification:	ISO9000
Model Number:	EN10305-1, DIN2391

Payment & Shipping Terms:

Minimum Order Quantity:	5TONs
Price:	Negotiable
Packaging Details:	Exporting package/wooden box package
Delivery Time:	30DAYS
Payment Terms:	TT OT 100% LC AT SIGHT
Supply Ability:	1000Ton/month

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Product Description：

Detail Information
Standard:	EN10305-1, DIN2391	Grade:	E235, E255, E355
Type:	Seamless Cold Drawing Or Cold Rolled	OD. Range:	6mm – 114.3mm
Wall Thickness:	1mm-15mm	Length:	Max Length 12M
High Light:	E255 Seamless Precision Steel Tube , E255 Precision Cylinder Tubes , Precision Cylinder Tubes

EN10305-1 E235/E255/E355 + NBK/N/BK Gas Spring Precision Seamless Steel Tube

Precision Cylinder Tubes, Honed Tubes

Seamless cold drawn precision tubes and pipes are widely used for machine structural purposes, automobile, and hydraulic pressure equipment.

Size: Outside Diameter: 6mm – 340mm, Wall Thickness: 1mm – 50mm

Standard: DIN2391, DIN2394, ASTM A519, JIS G3445 STKM

Application: used for Air Cylinder and Oil Cylinder, Oil Inlet Tubes and Gas Spring Tubes on Automobile, Bushing Tubes.

Steel Grade		Chemical Composition
Symbol	Material Number	C Max.	Si Max.	Mn Max.	P Max.	S Max.
E235	1.0308	0.17	0.35	1.20	0.025	0.025
E255	1.0408	0.21	0.35	0.40--1.10	0.025	0.025
E355	1.0580	0.22	0.55	1.60	0.025	0.025

Steel Grade		+C		+LC		+SR
Name	No.	Rm Mpa	A %	Rm Mpa	A %	Rm Mpa	ReH Mpa	A %
E235	1.0308	480	6	420	10	420	350	16
E255	1.0408	580	5	520	8	520	375	12
E355	1.0580	640	4	580	7	580	450	10

Steel Grade		+A		+N
Name	No.	Rm Mpa	A %	Rm Mpa	ReH Mpa	A %
E235	1.0308	315	25	340--480	235	25
E255	1.0408	390	21	440--570	255	21
E355	1.0580	450	22	490--630	355	22

Quality Control:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing or Cold Rolling, Online inspection
5. Heat Treatment:+SR, +A, +N
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.

100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.