Joho Steel Co., Ltd
JOHO STEEL CO.,LTD, founded in 1988, is a steel group which has integrated steel production, processing and trading into one. We specializes in manufacturing carbon seamless steel pipes, boiler tube
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PSL1 PSL2
| Grade | Chemical Components (%) | Mechanical Properties | ||||||
| C | Si | Mn | P | S | Tensile STrength(Mpa) | Yield STrength(Mpa) | ||
| ASTM A53 | A | ≤0.25 | - | ≤0.95 | ≤0.05 | ≤0.06 | ≥330 | ≥205 |
| B | ≤0.30 | - | ≤1.2 | ≤0.05 | ≤0.06 | ≥415 | ≥240 | |
| ASTM A106 | A | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥415 | ≥240 |
| B | ≤0.35 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥485 | ≥275 | |
| API 5L PSL1 | A | 0.22 | - | 0.9 | 0.03 | 0.03 | ≥331 | ≥207 |
| B | 0.28 | - | 1.2 | 0.03 | 0.03 | ≥414 | ≥241 | |
| X42 | 0.28 | - | 1.3 | 0.03 | 0.03 | ≥414 | ≥290 | |
| X46 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥434 | ≥317 | |
| X52 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥455 | ≥359 | |
| X56 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥490 | ≥386 | |
| X60 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥517 | ≥448 | |
| X65 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥531 | ≥448 | |
| X70 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥565 | ≥483 | |
| API 5L PSL2 | B | 0.24 | - | 1.2 | 0.025 | 0.015 | ≥414 | ≥241 |
| X42 | 0.24 | - | 1.3 | 0.025 | 0.015 | ≥414 | ≥290 | |
| X46 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥434 | ≥317 | |
| X52 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥455 | ≥359 | |
| X56 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥490 | ≥386 | |
| X60 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥517 | ≥414 | |
| X65 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥531 | ≥448 | |
| X70 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥565 | ≥483 | |
| X80 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥621 | ||
| Standard | ||
| GB standard | Seamless steel pipe for structural purpose | GB/T8162-2008 |
| Seamless steel pipe for liuid service | GB/TB8163-2008 | |
| Seamless steel tubes for low and medium boiler | GB/3087-1999 | |
| Seamless steel tubes for high pressure boiler | GB/5310-1995 | |
| Seamless carbon steel marine tubes | GB/T5312-1999 | |
| High-pressure seamless steel tubes for chemical fertilizer equipments | GB/6479-2000 | |
| ASTM standard | Black and hot-dipped zinc-coated steel pipes welded and seamless | ASTM A53 |
| Seamless carbon steel for high temperature service | ASTM A106 | |
| Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes | ASTM A179 | |
| Seamless carbon steel boiler tubes for high pressure | ASTM A192 | |
| Seamless Medium-carbon boiler and superheater tubes | ASTM A210 | |
| Seamless carbon for mechanical tubing | ASTM A519 | |
| API standard | Seamless steel pipe for casing | API Spec 5CT |
| Seamless steel pipe for line pipe | API Spec 5L | |
| DIN standard | Seamless steel tube for elevated temperture | DIN 17175 |
| Cold drawn seamless prevision pipe | DN2391 | |
| Seamless circular unalloyed steel tubes subject to special requirements | DIN 1629 | |
| Types | |
| Structure Purposes | General structure and mechanical |
| Liquid Services | Petroleum, gas and other fluids conveying |
| Low and Medium Pressure | Steam and boiler manufacturing |
| Hydraulic Pillar Service | Hydraulic support |
| Auto Semi-shaft Casing | Auto sem-shaft casing |
| Line Pipe | Oil and gas conveying |
| Tubing and Casing | Oil and gas conveying |
| Drill Pipes | Well drilling |
| Geological Drilling Pipes | Geological drilling |
| Petroleum Cracking Tubes | Furnace tubes, heat exchangers |
