Description
Properties Of Copper Nickel Brake Tubings
Advantages of Automotive Brake Tubings Material
Application
Technical Specification
Recommended working pressures 90/10 copper nickel tubing can beused for brake tubing up to the following recommended working pressures
| OD Inches |
Wall Thickness Inches |
Recommended Maximum Working Pressure lb/in2 (Bar) |
|---|---|---|
| 3/16" | 0.028" | 3120 (215) |
| 1/4" | 0.028" | 2250 (155) |
| 5/16" | 0.028" | 1740 (120) |
| 3/8" | 0.028" | 1450 (100) |
| 1/2" | 0.028" | 1090 (75) |
| 5/8" | 0.048" | 1450 (100) |
| OD Mm |
Wall Thickness Mm |
Recommended Maximum Working Pressure lb/in2 (Bar) |
|---|---|---|
| 4.78mm | 0.7mm | 3050 (210) |
| 6mm | 0.7mm | 2320 (160) |
| 8mm | 0.028" | 1740 (120) |
| 10mm | 0.028" | 1305 (90) |
| 12mm | 0.028" | 1090 (75) |
Material Requirements for Copper Alloy C70600 for use in Automotive Brake Line
| Composition, percent maximum, unless shown as a range | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ni Fe Mn Zn Cu |
9.0 - 11.0 1.0 - 1.8 1.0 1.0 Remainder |
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| Mechanical Properties | |||||||||
| Yield Strength, min (0.2% offset) Tensile Strength, min Elongation in 50.8mm (2.0) |
110,316 kPa (16,000 psi) 310,179 kPa (45,000 psi) 40-55% |
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| Pressure Proof Test | |||||||||
| Unless otherwise specified, the finished tubing shall sithstand a hydrostatic proff test, with no evidence of failure, at a p[ressure which will subject the material to a fiber stress of 110,316 kPa (16,000 psi). Test pressure shall be determined by Barlow's equasion for thin hollog cylinders under tension: P = 2tS/D Where:
No tube shall be tested beyond a hydrostatic pressure of 34,473 kPa (5,000 psi), unless so specified. |
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Test Cycle Sequence for Evaluation of Automotive Vehicle Body and Chassis Components
| Pre-Conditioning | |||
|---|---|---|---|
| 1) | Salt Bath 20 km/h (12 mph) |
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| 2) | Dirt Road 70 km/h (45 mph) |
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| Test Cycle | |||
| 3) | Salt Spray Booth 15 Minutes |
10) | Vehicle Ramp Closure Checks |
| 4) | Salt Bath | 11) | Salt Bath 20 km/h (12 mph) |
| 5) | Washboard Salt Highway 65 km/h (40 mph) |
12) | Washboard Salt Highway 65 km/h (40 mph) |
| 6) | Dirt Road (Car/Lt Trk) Gravel (Hvy Trk) 70 km/h (45 mph) |
13) | Dirt Road 70 km/h (45 mph) |
| 7) | Washboard Salt Highway 65 km/h (40 mph) |
14) | Washboard Salt Highway 65 km/h (40 mph) |
| 8) | Dirt Road 70 km/h (45 mph) |
15) | Dirt Road 70 km/h (45 mph) |
| 9) | Humidity Chamber @ 50C (120°F) 85-92% R.H. 6 hours |
16) | Humidity Chamber @ 50C (120°F) 85-92% R.H. 7 hours |
Trailer Corrosion Test Results
| Sample No. | Hydrostatic Brust Pressure | |
|---|---|---|
| kPa | psi | |
| Before Test Exposure | ||
| 1 | 114,108 | 16,550 |
| 2 | 113,079 | 16,400 |
| Average: | 113,591 | 16,475 |
| After 200 Test Cycles | ||
| 3 | 104,111 | 15,100 |
| 4 | 102,732 | 14,900 |
| 5 | 100,663 | 14,600 |
| 6 | 99,974 | 14,500 |
| Average: | 101,870 | 14,775 |
