Product Name: SA178 Grade A C D Electric Resistance Welded Carbon Steel Pipe Boiler and Superheater Tubes
Size Range: OD: 12.7-127mm, WT: 0.9-9.1mm, Length: 5.8m/6m, maximal 11.8m
Applications: For Boilers, Superheaters, Heat-Exchangers, Condensers, Boiler flues, Superheater flues and Safe ends
Heat treatment:
After welding, all tubes are heat treated at a temperature of 1650℉ (900℃) or higher and followed by cooling in air or in the cooling chamber of a controlled atmosphere furnace.
Cold-Drawn tubes are heat treated after the final cold-draw pass at a temperature of 1200℉(650℃)or higher.
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 or Cold Rolling, On line inspection
5. Heat Treatment
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.
100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.
| Product Name | SA178 Electric Resistance Welded Carbon Steel Boiler Tubes |
| Material | Grade A, Grade C, Grade D |
| Delivery Condition | Heat Treatment |
| Standard | SA178 |
| Application | Heat Exchanger, Condensers and similar heat transfer apparatus |
| Certificate | ISO 9001 |
| HS code | 7304319000 |
| Delivery Time | 40 days |
| Packing | Bundles or Wooden Boxes |
Chemical Properties
| Element | Grade A,Low-Cabon Steel | Grade C,Medium-Carbon Steel | Grade D, Carbon-Manganese Steel |
| Carbon | 0.06-0.18 | 0.35 Max | 0.27Max |
| Manganese | 0.27-0.63 | 0.80Max | 1.00-1.50 |
| Phosphorus,Max | 0.035 | 0.035 | 0.030 |
| Sulfur,Max | 0.035 | 0.035 | 0.015 |
| Silicon | - | - | 0.10 min |
| Mechanical Properties | Grade A | Grade C | Grade D | |
| Tensile Strength:min ksi(Mpa) | 47(325) | 60(415) | 70(485) | |
| Yield Point:min ksi(Mpa) | 26(180) | 37(255) | 40(275) | |
| Elongation | ≥35% | ≥30% | ≥30% | |
