Sae J526 Welded Low Carbon Steel Tube For Auto Refrigeration / Hydraulic

Product Description

SAE J526 Welded Low Carbon Steel Tubing for Auto Refrigeration, Hydraulic

 

 

Application:covers welded single-wall low-carbon steel tubing intended for generalautomotive, refrigeration, hydraulic, and other similar applications requiring tubing of a quality suitable forbending, flaring, beading, forming, and brazing.

 

size:length--2~12m WT--2~4.5mm OD--16~50mm

 

Manufacture:The tubing shall be made from a single strip of steel shaped into a tubular form, the edges ofwhich are joined and sealed by a suitable welding process. After welding, the bead shall be removed from theoutside to provide a smooth round surface and the tubing shall be processed in such a manner as to producea finished product which will meet all requirements of this document. Typically this type of tubing is availablein both coiled and straight condition. Straightness requirements should be agreed upon between supplier andpurchaser.

 

 

Inspection items:

chemical composition

Tensile test

Ultrasonic examination

Eddy current flaw detection

Bending test

Flattening test

 

Permissible Tolerance of Outer Diameter and Wall Thickness (mm)

 

Type of steel Tube	Dimension of steel tube		Permissible tolerance
			Average class	High class
Hot-rolled (extruded and expanded) tube	Outer diameter D	All	±1% (min.+/-0.50)	-
	Wall thickness	All	+15%/-12.5% (min.+4.5/-4.0)	-
Cold-drawn (cold-rolled) tube	Outer diameter D	6~10	±0.2	±0.15
		>10~30	±0.40	±0.20
		>30~50	±0.45	±0.30
		>50	±1%	±0.8%
	Wall thickness	<1	±0.15	±0.12
		>1~3	+15% -10%	+12.5% -10%
		>3	+12.5% -10%	±10%
Note: For hot-expanded tubes with outer diameter>35mm,the permissible tolerance of wall thickness is±18%.

 

 

Longitudinal Mechanical Properties of Steel Tubes

 

NO.	Steel Grade	Tensile Strength(Mpa)	Yield point(Mpa)		Elongation after breaking(%)
			s<16	s>16
			Not less than
1	10	335~475	205	195	24
2	20	410~550	245	235	20
3	Q295	430~610	295	285	22
4	Q345	490~665	325	315	21

 

 

Competitive Advantage:

Good source of raw material from Bao Steel.

Prompt delivery time according to PO and agreement.

Produce exactly according to standard and customer's requirement.

Experienced export team for customer service, quick reply within 24 hours.

 

Production Site:

 

 

 

  

 

 

Test Methods:

Tensile test

 

Flattening test

 

Drift expanding test

 

Dimensional inspection

 

Roughness measurement

 

Visual examincation

 

Not-destructive testing

a. Test for longitudinal imperfections-  

-  Eddy current test - EN10246-3, level E3

-  ultrasonic testing - EN10246-7, level U3

 

b. Leak-tightness

-  Non-destructive testing for verification of leak-tightness shall be carried out in accordance with EN10246-1

 

 

EN10305 Consists of the following Parts under the general title " Steel tubes for precision applications - Technical delivery conditions "

 

Part 1:  Seamless Cold Drawn Tubes

 

Part 2:  Welded Cold Drawn Tubes

 

Part 3:  Welded Cold Sized Tubes

 

Part 4:  Seamless Cold Drawn Tubes for Hydraulic and Pneumatic Power Systems

 

Part 5:  Welded and Cold Sized Square and Rectangular Tubes

 

Part 6:  Welded Cold Drawn Tubes for Hydraulic and Pneumatic Power Systems

 

Normative references:

 

EN10002-1, Metallic materials - Tensile Testing - Part 1: Method of test at ambient temperature

 

EN10020,    Definition and classification of grades of steel

 

EN10021,    General technical delivery requirements for steel and iron products

 

EN10027-1, Designation systems for steel - Part 1 : Steel names, principal symbols

 

EN10027-2, Designation systems for steel - Part 2: Numerical systems

 

EN10052,     Vocabulary of heat treatment terms for ferrous products.

 

EN10204,     Metallic products - Types of inspection documents

 

EN10233,     Metallic materials - Tube - Flattening Test

 

EN10234,     Metallic materials - Tube - Drift expanding test

 

EN10246-1,  Non-destructive testing of steel tubes - Part 1:  Automatic electromagnetic testing of seamless and welded ( except submerged arc-welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness

 

EN10246-3, Non-destructive testing of steel tubes - Part 3: Automatic eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections

 

EN10246-5, Non-destructive testing of steel tubes - Part 5: Automatic full peripheral magnetics transducer/flux leakage testing of seamless and welded ( expcept submerged arc-welded) ferromagnetic steel tubes for the detection of longitudinal imperfections

 

EN10246-7, Non-destructive testing of steel tubes - Qualification and competence of level 1 and 2 non-destructive testing personnel.

 

EN ISO377, Steel and Steel products - Location and preparation of samples and test pieces for mechanical testing  (ISO 377:1997)

 

EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and Low alloy steels (EN102566-1:1984)

 

EN 10168, Iron and steel products - Inspection documents - List information and description

 

ENV10220, Seamless and welded steel tubes - Dimensions and masses per unit length

 

EN10266,  Steel Tubes, fittings and structural hollow sections - Definitions and symbols for  use in product standards

 

EN ISO 4287,  Geometrical product specifications (GPS) - Surface Texture: Profile method - Terms, definition and surface texture parameters ( ISO 4287:1997)