GB5310 20G 20MnG 15MoG Carbon Seamless Steel Pipe
The GB 5310 standard is applicable to the manufacture of seamless steel pipes for steam boilers and pipelines with high pressure and above.
Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of gb5310 20g 20mng 15mog carbon seamless steel pipe in China, also supports customized service with low price. Welcome to wholesale discount gb5310 20g 20mng 15mog carbon seamless steel pipe for sale here from our factory. Contact us for free sample.
GB5310 Carbon Seamless Steel Pipe
20G 20MnG 15MoG Carbon Seamless Steel Pipe Description
When the 20G (high-quality carbon structural steel pipe) provided by GB5310 is used as a heating surface pipe fitting, the maximum wall temperature for long-term use is ≤ 450 ℃; when the 20G seamless steel pipe provided by GB5310 is used as a steam collector pipe and steam pipe, the long-term use temperature Should be ≤ 425 ℃.
GB 5310 20MnG is another low alloy steel with excellent mechanical properties and high temperature strength. 20MnG high-pressure seamless boiler tubes are widely used in power plant boilers, and their quality and performance are important factors in ensuring reliable and safe operation of boilers.
15CrMoG is a GB 5310-95 steel grade (equivalent to 13CrMo44 in the Federal Republic of Germany; equivalent to 1Cr-1/2Mo and 1 1/4cr-1/2mo-si steels widely used in countries around the world). Its chromium content is higher than 12CrMo steel, so it has higher hot strength at 500-550°C. When the temperature is higher than 550 ℃, the thermal strength of 15CrMoG steel will be significantly reduced. Long-term operation at temperatures of 500-550ec, although not graphitization, will produce carbide spheroidization and redistribution of alloying elements, which will lead to a reduction in the thermal strength of the steel. 15CrMoG steel has good relaxation resistance at 450 °C. Its pipe making and welding process performance is good.
GB5310 20G 20MnG 15MoG Steel Pipe Specification
Mechanical properties:
| Standard | Trademark | Tensile strength(MPa) | Yield strength(MPa) | Elongation(%) |
| GB5310 | 20G | 410~550 | ≥245 | ≥24 |
| 20MnG | ≥415 | ≥240 | ≥22 | |
| 15MoG | 450~600 | ≥270 | ≥22 |
Chemical composition:
| Standard | Trademark | Chemical Composition | |||||||||
| C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V | ||
| GB5310 | 20G | 0.17~0.24 | 0.17~0.37 | 0.35~0.65 | ≤0.030 | ≤0.030 | / | / | ≤0.20 | ≤0.25 | / |
| 20MnG | 0.17~0.24 | 0.17~0.37 | 0.70~1.00 | ≤0.030 | ≤0.030 | / | / | ≤0.20 | ≤0.25 | / | |
| 15MoG | 0.12~0.18 | 0.17~0.37 | 0.40~0.80 | ≤0.030 | ≤0.030 | / | 0.25~0.35 | ≤0.20 | ≤0.30 | / | |
Carbon Seamless Boiler Pipe
Heat treatment for GB 5310 20MnG High Pressure Boiler Tubes
| Grade | Heat treatment |
| 20MnG | 880 ℃～940 ℃,Normalizing |
Heat treatment for GB 5310 20G High Pressure Boiler Tubes
| Grade | Heat treatment |
| 20G | 880 ℃～940 ℃,Normalizing |
Heat treatment for GB 5310 15CrMoG High Pressure Boiler Tubes
| Grade | Heat treatment |
| 15CrMoG | 900 ℃～960 ℃,Normalizing；660 ℃～730 ℃,Tempering |
Company Profile
GNEE Steel Pipe Group is a comprehensive enterprise integrating production and trade. It has established multiple steel production lines in joint ventures with many well-known steel companies, with an annual output of 2 million tons. The company's main products are stainless steel pipes, low carbon steel pipes, and galvanized steel pipes. , alloy steel pipes, high temperature steel pipes, low temperature steel pipes, high pressure boiler pipes, etc. Over the years, our steel pipes have been exported to more than 150 countries and regions in Southeast Asia, Central Asia, Canada, South America, the Middle East, Africa, etc. We always adhere to the sales philosophy of "customer first, service first" and provide high performance and low price The products are deeply trusted by customers and enjoy a good reputation at home and abroad. We sincerely look forward to your visit, purchase, and establishing a long-term and good business relationship with you. We will live up to your expectations.
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