ASME SA209 Seamless T1a Carbon Alloy Steel Boiler Tubes
ASME SA209 Seamless T1a Carbon Alloy Steel Boiler Tubes
YUHONG Group offers ASME SA209 T1a SMLS carbon Alloy steel tubes which generally are used for heat exchanger and boilers.
This specification covers several grades of minimum-wall thickness, seamless, carbon-molybdenum alloy-steel, boiler and superheater tubes.
Its chemical composition is simple, but it contains molybdenum, so its thermal strength is better than that of carbon steel while maintaining the same process performance as carbon steel. However, the steel also has a graphitization tendency after long-term operation at high temperature, so its service temperature should be controlled below 510°C and overheating should be prevented.
During smelting, the addition of Al should be limited to control and delay its graphitization process. This steel pipe is mainly used for parts such as water wall, superheater and reheater.
Specifications
| Standard | ASME SA209 | ||||
| Name of Material | Seamless Tubes | ||||
| Keywordas | Boiler tubes; Seamless steel tube; Steel tube; Superheater tubes | ||||
| Manufacture | Hot Finished / Cold Finished | ||||
| Quantity | Feet,metres,or number of lengths | ||||
| Size | OD:1/2 to 5 in. (12.7 to 127mm) and WT Min. :0.035 to 0.5 in.(0.9 to 12.7mm) | ||||
| Length | Specific or random | ||||
| Heat Treatment | At a temperature of 1200° F (650 °)or higher after the final cold draw pass | ||||
Tubes when inserted in the boiler shall stand expanding and beading without showing cracks or flaws. Superheater tubes when properly manipulated shall stand all forging, welding, and bending operations necessary for application without developing defects.
Test Required
Tension Test / Flattening Test / Flaring Test / Hardness Test / Hydrostatic Test
Chemical Composition %
| Carbon | Manganese | Phosphorus,Max | Sulfur,Max | Silicon | Molybdenum |
| 0.15-0.25 | 0.30-0.80 | 0.025 | 0.025 | 0.10-0.50 | 0.44-0.65 |
Mechanical Property
| Steel Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) |
| SA209 | 220 min | 415 min | 30 min |
Hardness Requirements
Brinell Hardness Number (Tubes 0.200 in. [5.1 mm] and over in Wall Thickness), HBW----153
Rockwell Hardness Number (Tubes less than 0.200 in. [5.1 mm] in Wall Thickness), HRB----81
Applications Industry
Condensers & Boiler Off-Shore Oil Drilling Companies
Chemical Equipment Power Generation
Sea Water Equipment Petrochemicals
Heat Exchangers Gas Processing
Pulp and Paper Industry Pharmaceuticals
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