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JIS G3461 carbon steel tubes for boiler
This Japanese Industrial standard specifies the carbon steel tubes,hereinafter refered to as "tubes",used for exchanging heat on the inside and outside of the tube,such as water tubes,smoke tubes,catalyser tubes,etc.used in chemical and petroleum industries. however,it is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.
Description
Tianjin Wanlei Steel Pipe Co., Ltd. is one of the leading manufacturers and suppliers of jis g3461 carbon steel tubes for boiler in China, featured by quality products and low price. If you're going to wholesale durable jis g3461 carbon steel tubes for boiler made in China, welcome to get pricelist and free sample from our factory.
JIS G3461 carbon steel tubes
1.Apperance
(1)The tue shall be practically straight and its both ends shall be at right angles to its axis.
(2)The inside and outside surfaces of the tube shall be well-finished and free from defects injurious to use.However,in the cas of electric resistance welded thbe the swelling of inside surface of the weld shall be 0.25mm or less.In this case,if necessary,the purchaser may specify the inside swelling as 0.5mm or less for the tubes 50.8mm or under in outside diameter and at the same time 3.5mm or under in wall thickness.
2.Class Symbol
| Class new | Information reference Traditional symbol |
| STB 340 | STB 35 |
| STB 410 | STB 42 |
| STB 510 | STB 52 |
3.Chemical Composition
| Grade | Mfg.process | Chemical composition % | ||||||||
| C(max) | Si (max) | Mn | P (max) | S (max) | Ni | Cr | Mo | others | ||
| STB35 | S,E | 0.18 | 0.35 | 0.30-0.60 | 0.035 | 0.035 | - | - | - | - |
| STB42 | S,E | 0.32 | 0.35 | 0.30-0.60 | 0.035 | 0.035 | - | - | - | - |
| STB52 | S,E | 0.25 | 0.35 | 1.00-1.50 | 0.035 | 0.035 | - | - | - | - |
4.Mechanical properties
| Symbol of class | Tensile strength N/mm² | Yield point or proof stree N/mm² | Elongation % | ||
Outside diameter 20mm or over | Outside diameter 10mm or over to and excl.10mm | Outside diameter under 10mm | |||
No.11 test piece No.12 test piece | No 11 test piece | No.11 test piece | |||
| STB 340 | 340 | 175 | 35 | 30 | 27 |
| STB 410 | 410 | 255 | 25 | 20 | 17 |
| STB 510 | 510 | 295 | 25 | 20 | 17 |
5.Main application areas
1. Power plant boiler system: water-cooled wall tubes, smoke tubes, superheater tubes, reheater tubes, economizer tubes
2. Petrochemical/chemical industry: heat exchanger tubes, condenser tubes, reactor tubes, catalyst tubes, medium and high pressure fluid transport tubes
3. Industrial heat exchange equipment: air preheater, waste heat recovery device, centralized heating heat exchange station
4. Ship/Ocean Engineering: Marine boilers, heat exchange systems, high-temperature steam pipelines
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