TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Application | Brake Line |
| Thickness | 0.50, 0.60, 0.70, 0.80, 1.00, 1.20 mm |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Grade | 45#,20#,16Mn,10#,Q345 |
| Section shape | Round,Rectangular |
| Outer diameter(round) | 4.76-12.7 mm |
| Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe,cold drawn |
| Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Brand Name | TORICH |
| Model Number | Bundy Tube |
| Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | ISO9001 ISO 14001 TS16949 |
View Detail Information
Explore similar products
Carbon Steel Cold Drawn Bright Shock Absorber Tube Precision Steel Tube for
ERW Precision Steel Tubes ERW Precision Tubes
High Tolerance Seamless Steel Tubes / Precision Steel Pipe Pipe For Automotive
Torich GB/T13793 Q195 Welded Steel Tube ERW Precision Steel Tube
Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Application | Brake Line | Thickness | 0.50, 0.60, 0.70, 0.80, 1.00, 1.20 mm |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn | Grade | 45#,20#,16Mn,10#,Q345 |
| Section shape | Round,Rectangular | Outer diameter(round) | 4.76-12.7 mm |
| Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe,cold drawn | Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Brand Name | TORICH | Model Number | Bundy Tube |
| Certification | ISO9001 ISO 14001 TS16949 | Place of Origin | ISO9001 ISO 14001 TS16949 |
| High Light | SAE J527 Bundy Tube ，Copper-Plated Double-Wall Copper-Brazed Steel Tube ，4.76-12.7 mm Outer Diameter Precision Steel Tube | ||
SAE J527 double-layer copper-plated low-carbon steel tube, commonly known as Bundy tube, is a precision-formed, copper-brazed steel tubing product used in brake, fuel, hydraulic, and refrigeration systems. SAE J527 covers brazed double-wall low-carbon steel tubing for applications that require reliable bending, flaring, beading, forming, and brazing, while ASTM A254 covers the closely related double-wall copper-brazed steel tubing widely used in automotive and refrigeration service.
Structure: Double-wall rolled and copper-brazed low-carbon steel tube
Base material: Cold-rolled low-carbon copper-coated steel strip
Outer diameter range: 4.76-12.7 mm
Main outer diameters: 4.76, 6.00, 6.35, 8.00, 9.52, 10.00, 12.70 mm
Common wall thicknesses: 0.50, 0.60, 0.70, 0.80, 1.00, 1.20 mm
Wall thickness tolerance: typically around ±0.05 mm in precision production
Supply condition: Fully annealed for bending and secondary forming
Optional surface finishes: Copper-plated, zinc-coated, PVF-coated, or other corrosion-protection finishes
Supply form: Coils, straight lengths, or cut-to-length assemblies
360° circumferential brazed bonding for stable sealing performance and high structural integrity
Double-wall construction for higher burst resistance and better vibration durability than ordinary single-wall welded tubing
Very clean inner surface, with lubricant residue controlled below 0.05 g/m² in the PPT process description
High dimensional accuracy and good concentricity for precision assembly
Full annealing for excellent bendability, flareability, and formability in brake-line routing
Safer sealing for brake-line service
hidden leakage points. This tube uses a double-wall rolled structure with full circumferential copper brazing rather than a simple single seam, which improves wall integrity and sealing reliability in hydraulic brake applications.
Easier installation in complex chassis layouts
whether the tube will crack or wrinkle during bending and flaring. The fully annealed condition, low-carbon substrate, and formability-focused SAE J527 scope make it suitable for routing through tight installation spaces while maintaining good processing performance.
Cleaner and more durable fluid delivery
For brake, fuel, and hydraulic lines, internal cleanliness and corrosion control matter as much as strength. The PPT specifies inner-surface residue below 0.05 g/m², and the tube can be supplied with zinc, PVF, or similar protective coatings for improved underbody corrosion resistance.
| Reference Grade | Standard Reference | C (%) | Mn (%) | P (%) | S (%) | Si (%) |
|---|---|---|---|---|---|---|
| DC01 | EN 10130 | ≤0.12 | ≤0.60 | ≤0.045 | ≤0.045 | — |
| DC03 | EN 10130 | ≤0.10 | ≤0.45 | ≤0.035 | ≤0.035 | — |
| 10# | GB/T 699 | 0.07-0.13 | 0.35-0.65 | ≤0.035 | ≤0.035 | 0.17-0.37 |
| SAE 1008 | SAE/AISI reference | ≤0.10 | 0.30-0.50 | ≤0.04 | ≤0.05 | — |
| SAE 1010 | SAE/AISI reference | 0.08-0.13 | 0.30-0.60 | ≤0.04 | ≤0.05 | — |
| Reference Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| DC01 | 270-410 | ≥280 | ≥28 | HV 105 |
| DC03 | 270-370 | ≥240 | ≥34 | HV 100 |
| 10# | ≥335 | ≥205 | ≥31 | ≤137 HB |
| SAE 1008 | 300-360 | 180-300 | 20 | HB 95 |
| SAE 1010 | 365 | 305 | 20 | HB 105 |
SAE: SAE J527 — brazed double-wall low-carbon steel tubing for automotive, refrigeration, hydraulic, and related applications requiring bending, flaring, beading, forming, and brazing.
ASTM: ASTM A254/A254M — double-wall copper-brazed steel tubing for fuel lines, brake lines, oil lines, and heating/cooling service.
EN / DIN: DIN 74234 — brake pipes and flares for hydraulic braking systems; covers dimensions, materials, and requirements for brake-pipe service.
JASO / Japanese automotive reference: JASO M101:2022 — metal pipes for automobile tubing used for brake, fuel, and lubrication purposes.
GB: GB/T 34020.2-2017 — double-wall copper-brazed steel tubes for automotive tubing systems, including dimensions, tolerances, technical requirements, test methods, and inspection rules.
GOST: GOST 11249-80 — steel rolled-up soldered double-layer tubes for hydraulic systems, automobiles, and household refrigeration service.
This product is mainly used in automotive brake systems, fuel and hydraulic tubing systems, refrigeration equipment, and compact heat-transfer assemblies where pressure resistance, clean internal surface, good bendability, and stable dimensional control are required.
Brake lines: Hydraulic brake pipes between the master cylinder, ABS unit, and wheel-end braking assemblies
Fuel lines: Low-pressure fuel delivery tubing with good sealing and internal cleanliness
Hydraulic lines: Power steering, transmission, and medium-pressure fluid transfer circuits
Refrigeration tubing: Condensers, evaporators, anti-condensation loops, and air-conditioning connector tubes
Industrial equipment: Hydraulic devices, engineering machinery, and heater assemblies requiring vibration resistance and compact routing
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta... A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta...
Get in touch with us
Leave a Message, we will call you back quickly!