ASTM A179 Standard Cold Drawn 3/4'' 14BWG Heat Exchanger Tubes
Product Details
ASTM A179 Standard Heat Exchanger Tubes
,3/4'' 14BWG Heat Exchanger Tubes
,ASTM A179 Cold Drawn Tubes
ASTM A179 3/4'' 14BWG Heat Exchanger Tube
| Standard | ASTM A179 |
| Matrial | 10# 20# etc Carbon Steel |
| Size | OD: 12.7-177.8mm WT: 1-25.4mm Length: according to customer requirement |
| Application | For Boilers,Superheaters, Heat-Exchangers, High-pressure Boilers |
| Production | Tubes are manufactured by seamless process and both hot finished and cold finished are applicable |
| Heat treatment | Hot finished tubes need not be heat treated. Cold Finished tubes are heat treated after the final cold finishing pass at a temperature of 1200℉(650℃) or higher |
| C | 0.06-0.18 |
| Mn | 0.27-0.63 |
| P | ≤0.035 |
| S | ≤0.035 |
| Si | ≤0.25 |
| Brinell Hardness | Rockwell Hardness Number |
| WT≥0.200 in (5.1mm) | WT≤0.200 in (5.1mm) |
| 137 HRB | 77HRB |
Mechanical Properties Tests and Inspection
Tensil Streghth: min ksi[Mpa] 47[325] Flattening Test Flaring Test
Yield Point: min ksi[Mpa] 26[180] Flange Test Hardness Test
Elongation: ≥35% Hydrostatic Test
QUALITY CONTROL:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
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