High Pressure Boiler Steel Pipe Seamless ASME SA 178 GR.D
ASME SA178 GR.D Boiler Steel Pipe For High-Pressure Boiler Generating Tubes
Description
ASME SA 178 Gr. D Boiler Steel Pipe is a specification for Electric Resistance Welded (ERW) Carbon-Manganese Steel Tubes used in high-pressure, high-temperature boiler, superheater, and heat exchanger applications, known for reliability in power generation, offering strength and good formability in medium carbon content steel. Grade D specifically uses carbon-manganese steel for enhanced properties, with strict chemical and mechanical requirements, ensuring safe operation in critical steam systems.
| American Standard | Standard Name |
| SA-178 / SA-178M | Specification For Electric-Resistance-Welded Carbon Steel And Carbon-Manganese Steel Boiler And Superheater Tubes |
ASME SA178 GR.D Boiler Steel Pipe Chemical Composition
Sources American Standard SA-178 / SA-178M TABLE 1 CHEMICAL REQUIREMENTS
| Element | Grade A, | Grade C, | Grade D |
| Low-Carbon Steel | Medium-Carbon Steel | Carbon-Manganese Steel | |
| Carbon | 0.06-0.18 | 0.35 max | 0.27 max |
| Manganese | 0.27-0.63 | 0.08 max | 1.00-1.50 |
| Phosphorus, max | 0.035 | 0.035 | 0.03 |
| Sulfur, max | 0.035 | 0.035 | 0.015 |
| Silicon | … | … | 0.01 min |
ASME SA178 GR.D Boiler Steel Pipe Mechanical Properties
Sources American Standard SA-178 / SA-178M TABLE 2TENSILE REQUIREMENTS
| Mechanical Properties | Grade A | Grade C | Grade D |
| Tensile strength, min, ksi [MPa] | 47[325] | 60[415] | 70[485] |
| Yield strength, min, ksi [MPa] | 26[180] | 37[255] | 40[275] |
| Elongation in 2 in. or 50mm, min, % | 35 | 30 | 30 |
| For longitudinal strip tests a deduction for each1⁄32 in[0.8mm] decrease in wall thickness below 5⁄16 in. [8mm] from the basic minimum elongation of the following percentage points shall be made. | 1.50A | 1.50A | 1.50A |
ASME SA178 GR.D Boiler Steel Pipe Manufacturing Process
ASME SA178 GR.D Boiler Steel Pipe Application
- High-Temperature Superheater and Reheater Tubes
- High-Heat-Flux Boiler Tubes
- High-Pressure Boiler Generating Tubes
- High-Pressure / High-Temperature Heat Exchangers
ASME SA178 GR.D Boiler Steel Pipe Packing & Loading
a. 1/2"-2"Plain end with black oil paint, caps both ends, bundles with loading belt.
b. 2"-4"Beveled end with black oil paint, caps both ends, bundles with loading belt.
c. 10"-20"Beveled end with black oil paint, caps both ends, loose packed in to container.
ASME SA178 GR.D Boilar Steel Pipe Packing
→ASME SA178 GR.D Boilar Steel Pipe is transported in containers
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