JIS G3461 Carbon Steel Tubes For Boiler And Heat Exchanger
JIS G3461 Carbon Steel Tubes for Boiler and Heat Exchanger
Scope:JIS G3461 Carbon Steel Tubes is mainly used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc.Its application fields are: boiler tubes, heat exchanger tubes, condenser tubes, catalyzer tubes, etc. It can also be used in chemical and petroleum industries, But it can't be used for low temperature service.
Chemical Composition:
| Grade | Process | Chemical Composition (%) | ||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | Others | ||
| STB35 | S, E | 0.18Max | 0.35Max | 0.30~0.60 | 0.035Max | 0.035Max | - | - | - | - |
| STB42 | S, E | 0.32Max | 0.35Max | 0.30~0.60 | 0.035Max | 0.035Max | - | - | - | - |
| STB52 | S, E | 0.25Max | 0.35Max | 1.00~1.50 | 0.035Max | 0.035Max | - | - | - | - |
Mechanical Properties:
| Symbol of class | Tensile strength N/mm2 {kgf/mm2} | Yield point or proof stress N/mm2 {kgf/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 | |||
| STB340 STB410 STB510 | 340{35}min. 410{42} min. 510{52} min. | 175{18} min. 255{26} min. 295{30} min. | 35 min. 25 min. 25 min. | 30 min. 20 min. 20 min. | 27 min. 17 min. 17 min. |
Manufacture Method:
| Symbol of class | Heat treatment | ||||
| Hot finished seamless steel tube | Cold finished seamless steel tube | Electric resistance welded steel tube other than hot finished or cold finished steel tube | Finished electric resistance welded steel tube | Fold finished electric resistance welded steel tube | |
| STB 340 | As manufactured, as required, low temperature annealing or normalizing may be performed. | Low temperature annealing, normalizing or full annealing. | Normalizing | As manufactured. However, as required, low temperature annealing or normalizing may be performed. | Normalizing |
| STB 410 | As manufactured. However, as required, low temperature annealing or normalizing may be performed. | Low temperature annealing, normalizing or full annealing. | Normalizing | Low temperature annealing | |
| STB 510 | Normalizing | ||||
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Company Introduction:
Packaging and Delivery:
FAQ:
Q: Are you trading company or manufacturer?
A: We are a professional steel pipes materials manufacturer.
Q: How long is your delivery time?
A: Generally it takes 7-14 days if the goods are in stock or 30-60 days if there is no stock, this mainly depends on quantity.
Q: Do you provide free sampleas?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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