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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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JIS G 3461 Seamless Carbon Bending Steel Tubing For Boiler / Heat
Exchanger
JIS G 3461 Seamless carbon Steel tubes for boiler and heat
exchanger
Size range:OD 5-420mm*WT0.5-50mm
Length: 12000m below, or upon customer's requests.
Application:for boiler and heat exchanger
| CHEMICAL COMPOSITION % max | |||||
| Steel grade | C | Si | Mn | P | S |
| STB 340 | 0.18 | 0.35 | 0.30-0.60 | 0.35 | 0.35 |
| STB 410 | 0.32 | 0.35 | 0.30-0.80 | 0.35 | 0.35 |
| STB 510 | 0.25 | 0.35 | 1.00-1.50 | 0.35 | 0.35 |
| Remark: 1. When the purchaser requires product analysis,the permissible deviation for the values given above shall be as specified in the Table in JIS G 032 for the seamless steel tube and likewise in Table 1 (as JIS G 3461)for the electric resistance welded steel tube. 2.Where required by the purchaser,Si may be designated as 0.1-0.35% | |||||
| MECHANICAL PROPERTIES min | |||
| Steel grade | Tensile strength Mpa | Yeild point or proof stress Mpa | Elongation % |
| STB 340 | 340 | 175 | 35 |
| STB 410 | 410 | 255 | 25 |
| STB 510 | 510 | 295 | 25 |
| Hardness | |
| Steel grade | Rockwell hardness HRB(Mean value of three points) |
| STB 340 | 77max |
| STB 410 | 79max |
| STB 510 | 92max |
| Heat Treatment (Applicable till the end of 1990) | |||||
| Steel Grade | 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 | ||||
Please specify the delivery condition and heat treatment
requirement when sending the enquiry.
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 and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring
Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield
Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a
perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate
longitudinal and transversal defects.
