JIS G3461 Carbon Steel Tubes is used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes and air preheater tubes of the boiler, and heat exchanger tubes,condenser tubes and catalyser tubes used in chemical and petroleum industries. It is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.
- OD: 15.9mm ~ 139.8mm
- WT: 1.24mm-59.54mm, SCH5~SCH160,XXS
- Length: 5-12m or as customer required
- Application: Hydraulic system pipeline pipe,Gas and Fluid Transportation, Mechanical Pipeline, power plant, etc.
- Supplementary Technology: Plain or threaded with socket, beveled with plastic caps, hydraulic testing, eddy current, Infrared test.
- Surface: Bare,black painted,varnished,oiled, 2PE, 3PE
- Delivery state: Hot Rolled, Cold Drawn
- Steel Grade: G3461 STB340 (STB35), G3461 STB410(STB42), G3461 STB510 (STB52)
JIS G3461 Chemical Composition:
| JIS G3461 | Traditional symbol | C | Si | Mn | P | S |
|---|---|---|---|---|---|---|
| STB 340 | STB 35 | 0.18 max | 0.35 max | 0.30 to 0.60 | 0.035 max | 0.035 max |
| STB 410 | STB 42 | 0.32 max | 0.35 max | 0.30 to 0.80 | 0.035 max | 0.035 max |
| STB 510 | STB 52 | 0.25 max | 0.35 max | 1.00 to 1.50 | 0.035 max | 0.035 max |
JIS G3461 Mechanical Property:
| JIS G3461 | Tensile strength N/mm2 | Yield point or proof stress N/mm2 | Elongation % | Hardness | ||
|---|---|---|---|---|---|---|
| Outside diameter under 10 mm | Outer diameter 10 mm or over to and excl. 20 mm | Outer diameter 20mm or over | ||||
| No. 11 test piece | No. 11 test piece | No. 11 test piece No. 12 test piece | ||||
| STB 340 | 340 min | 175 min | 27 min | 30 min | 35 min | 77max |
| STB 410 | 410 min | 255 min | 17 min | 20 min | 25 min | 79max |
| STB 510 | 510 min | 295 min | 17 min | 20 min | 25 min | 92max |
JIS G3461 Equivalent steel grade:
| JIS G3461 | ASTM | ASME | BS | DIN | ISO | ABS | NK | LRS | DNV |
|---|---|---|---|---|---|---|---|---|---|
| STB 340 | A178 | SA178 A | 3059-P1 320 | 17175 st 35.8 | ABS D | KSTB 33 | Sec 6 320 | Sec 4-E-TS360 | |
| STB 410 | A178 C | SA178 C | 3059-P2 440 | 17175 st 45.8 | ABS F | KSTB 42 | Sec 6 410 | Sec 4-E-TS410-1 | |
| STB 510 | 17175 19Mn 5 | Sec 4-E-TS510 |
