Sign In | Join Free | My benadorassociates.com
China Yuhong Group Co.,Ltd logo
Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
Verified Supplier

13 Years
Home > Copper Alloy Tube >

ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing

Product Categories
Yuhong Group Co.,Ltd
Trust Seal
Verified Supplier
Credit Check
Supplier Assessment
Contact Now

ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing

Brand Name : YUHONG

Model Number : ASTM A254 BHG2 Bundy Tube

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015

Place of Origin : CHINA

MOQ : 1000kgs

Payment Terms : L/C,T/T

Delivery Time : 7 DAYS

Packaging Details : Wooden case, Woven bag

Product Name : Bundy Tube

Standard : ASTM A254, ASME SA254

Material : BHG2

Thickness : 0.02 inch to 0.04 inch

O.D. : 0.187 inch to 0.5 inch

Surface : Copper Coated

Process : Cold rolling

Type : ERW

End : Plain Ends / Beveled Ends

Application : Vehicle parts, Refrigerator, Brake lines, Fuel lines, Automatic gearbox return lines, etc

High Light : ASTM A254 BHG2 Bundy Tube, Copper-Brazed Steel Tubing

Contact Now

ASTM A254 Copper-Brazed Steel Tubing BHG2 Bundy Tube

A Bundy tube is not just any steel tube; it's defined by its unique manufacturing process, which gives it exceptional properties. Its unique double-wall, copper-brazed construction gives it an unparalleled combination of strength, fatigue resistance, and leak-proof integrity, making it the undisputed first choice for the most critical hydraulic and fuel lines in vehicles.

  1. Strip Preparation: A low-carbon steel strip (typically ASTM A254 Grade 2) is first coated with a layer of copper.

  2. Double Rolling: This copper-coated strip is then passed through a series of rolls that form it into a seamless-looking, double-walled tube. The strip is rolled twice around its own longitudinal axis, creating a tight, overlapping seam.

  3. Copper Brazing: The tube is then passed through a continuous furnace with a controlled atmosphere (a hydrogen-nitrogen mix). The heat melts the copper coating at the seam, which acts as a brazing filler metal. Capillary action draws the molten copper into the entire length of the seam, creating a strong, uniform, and leak-proof metallurgical bond.

  4. Sizing and Cutting: The brazed tube is then cooled, drawn through dies to achieve precise final dimensions (OD, wall thickness), and cut to length.

Dimensional Accuracy

OD Tolerance Wall Thickness Tolerance
<4.76 ±0.05 0.5 ±0.07
4.76-8 ±0.08 0.5-0.7 ±0.08
8-12.7 ±0.10 0.7-1 ±0.09
>12.7 ±0.12 1-1.3 ±0.1

*Custom Sizes: We are capable of fabricating Bundy tube sizes which are not regularly used. By combining one or more processes of cold draw and annealing, Bundy tubes can be made to many other sizes to meet demands for special applications.

General Size and Tolerance

Outer diameter(φ)

Diameter

tolerance (mm)

 Wall thickness(mm) Wall thickness tolerance(mm) Pressure resistance(MPa) Burst pressure
(MPa)
4.76(3/16″) ±0.05 0.7 +0.05/-0.08 41.2 110
6 ±0.08 ±0.08 32.7 85
6.35(1/4″) ±0.08 ±0.08 30.9 78
8(5/16″) ±0.1 ±0.08 24.5 67.5
9.52(3/8″) ±0.1 ±0.08 20.6 57
10 ±0.1 ±0.08 19.6 55
12 ±0.1 ±0.08 16.3 32
10 ±0.1 1 ±0.08 28 65
12 ±0.1 ±0.08 23.3 56

Comparison with Alternative Tubing

Feature ASTM A254 BHG2 Bundy Tube SAE J525 Single-Wall Steel Tubing Nylon / Plastic Tubing
Construction Double-wall, copper-brazed Single-wall, welded or seamless Single-wall, extruded
Strength Very High for its wall thickness Good, but requires thicker walls for same pressure Low to Moderate
Weight Low Higher (for equivalent strength) Very Low
Fatigue Resistance Excellent Good Can be susceptible to cracking
Leak Proofness Excellent (metallurgical bond) Good (potential for weld defects) Good (if no damage)
Primary Use Critical Safety Systems (Brakes, Fuel) Less critical fluid lines (e.g., vent lines)

Applications

1. Automotive & Transportation (Largest Application)

2. Refrigeration & Air Conditioning

3. Heat Exchangers

4. Aerospace & Aviation

5. Industrial Applications

6. Hydraulic Control Systems

7. Instrumentation Tubing

ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing


Product Tags:

ASTM A254 BHG2 Bundy tube

      

copper-brazed steel instrumentation tubing

      

copper alloy Bundy tube

      
Quality ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing for sale

ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing Images

Inquiry Cart 0
Send your message to this supplier
 
*From:
*To: Yuhong Group Co.,Ltd
*Subject:
*Message:
Characters Remaining: (0/3000)
 
You May Like