Q235 Q345 ERW Welded Steel Tubes

Instruction

Quick Detail:
Size range: O.D.:6-350mm     W.T.:1-15mm      L: According to customer Order  
Grade: Low Carbon Steel Q235 Q345

Applications: for Bending and Flaring to Auto Parts

Manufacture and Production: ERW Tube+ DOM manufacturing
The tubing is made from flat-rolled steel shaped into a tubular form, the edges of which are joined and fused together by electric-resistance welding.
After forming and welding, the tubing shall be normalized and subjected to a cold-drawing operation that shall result in a 15% minimum reduction in cross-sectional area, of which 8% shall consist in a reduction in wall thickness. Subsequent to cold working, the tubing shall be normalized via an atmospherically controlled method to produce a finished product that will meet requirement of SAE J525.
 
Description:
Mechanical tubing made from hot or cold-rolled steel.
Covers electric-resistance-welded low carbon steel tubing for use as mechanical tubing

Advantage:
Good concentricity, Better price than seamless.

Table 1- TUBING OUTSIDE DIAMATER TOLERANCE
Nominal Tubing	Tolerance	Tolerance
OD mm	OD ±mm	ID ±mm
Up to 9.50	0.05	0.05
Over 9.50 to 15.88 inclusive	0.06	0.06
Over 15.88 to 50.80 inclusive	0.08	0.08
Over 50.8 to 63.50 inclusive	0.1	0.1
Over 63.50 to 76.20 inclusive	0.13	0.13
Over 76.20 to 100.00 inclusive	0.15	0.15
WT tolerance shall be not more than 10%

 

Table 2- TUBING WALL THICKNESS TOLERANCE
Nominal	Nominal OD	Nominal OD	Nominal OD
	Through 22mm	22-48mm	48-100mm
	±mm	±mm	±mm
0.89	0.05/0.05	0.05/0.05	0.05/0.05
1.00	0.05/0.05	0.05/0.08	0.05/0.08
1.25	0.05/0.05	0.05/0.08	0.05/0.08
1.50	0.05/0.05	0.05/0.08	0.05/0.08
1.65	0.05/0.05	0.05/0.08	0.05/0.08
2.00	0.05/0.05	0.05/0.08	0.05/0.08
2.11	0.05/0.05	0.05/0.08	0.05/0.08
2.410	0.05/0.05	0.05/0.08	0.08/0.08
2.500	0.05/0.08	0.05/0.10	0.08/0.08
2.770	0.05/0.08	0.05/0.10	0.08/0.08
3.000	0.05/0.08	0.05/0.10	0.08/0.08
3.050	0.05/0.08	0.05/0.10	0.08/0.08
3.4	-	0.05/0.10	0.08/0.08
3.75	-	0.05/0.10	0.08/0.08
4	-	0.08/0.10	0.08/0.10
4.19	-	0.08/0.10	0.08/0.10
4.57	-	0.10/0.10	0.08/0.13
5	-	0.10/0.13	0.10/0.13
Table 2- CHEMICAL REQUIREMENTS
Element		%
Carbon		0.06-0.18
Manganese		0.30  to 0.60
Phosphprus		0.040 max
Sulfur		0.050 max
Table 3- MECHANICAL PROPERTIES
Properties		Value
Yield Strength,min		170 Mpa
Ultimate Strength,min		310 Mpa
Elongation in 50mm, min		35%
Hardness ( Rockwell B),max		65

 

Production & Sample:

 

 

 

 

SAE PUBLICATIONS FOR RELATED STNANDARDS:
SAE J409    Product Analysis - Permissible Variations from Specified Chemical Analysis of a Heat or Cast of Steel
SAE J514    Hydraulic Tube Fittings
SAE J533    Flares for Tubing
 
SAE J1677  Test and Procedures for Low Carbon Steel and Copper Nickel Tubing
SAE J1065  Norminal Reference Working Pressure for Steel Hydraulic Tubing
SAE J1453  Fitting - O Ring Face Seal
PERFORMANCE REQUIREMENTS:
Flattening test - SAE1677
Flaring test - SAE1677
Reverse Flattening test - SAE1677
Expansion Test - SAE1677
Hardness Test - SAE1677
Tensile Test - SAE1677
Elongation Test - SAE1677
Pressure Proof Test - SAE1677
Nondestructive Electric Test - SAE1677
 
Test Certificate:  EN10204 3.1 B
Cleanliness-  The Inside and outside surfaces of the tubing is commercially bright, clean, and free from grease, oxide scale, carbon deposits, and any other contamination that can not  be readily removed by cleaning agents normally used in manufacturing plant
 
Corrosion Protection -  The inside and outside of the finished tubing is protected against corrosion during shipment and normal storage. The corrosion preventive compound can be readily removed by cleaning agents normally used in manufacturing after normal storage periods.
 
Packaging - The tubing is packed in a way allow it to be transported and stored. Usually in bundles with hexagonal shape with strong strips and lifting string for loading and unloading. Could also follow purchaser's requirement and agreement.