1. A large number of high-alloy heat-resistant cast steel are also used in the furnace bottom rollers and radiant tubes in the continuous heating furnace and heat treatment furnace of large metallurgical plants. The typical grade in China is 5Cr28Ni48W5 (HV.).Na22-HCR25Ni35Mo, 4Cr25Ni24Cr25NiLi3 (HHCR22Ni10 and 3Cr24Ni7sinRe.
2. China's representative brand is 40Cr25Ni20 (USA HKCR25NI35 (US HPCR25Ni35NB (US HP+NBCR25Ni35WNB (American HP+W+NBCR25Ni35CO015W5 (USA Supe Rtherm).
3. The heat-resistant steel in the United States mainly adopts the AISI (American Iron and Steel Institute) grade representation method, and the heat-resistant cast steel mainly adopts the ACI (American Alloy Casting Society) grade meter currency method. The American Society for Testing and Materials (ASTM) standards basically use the AISI and ACI heat-resistant steel and heat-resistant cast steel grade systems, with only a few ASTM own grades.
4. The old standard is to mark the letter h in front of the grade, and add the number sequence number after it, such as H1-H7 for ferritic heat-resistant steel, H10-H18 for austenitic heat-resistant steel, etc. Non-alloy tool steel grade representation method Non-alloy tool steel is commonly known as carbon tool steel in China.
5. Representation of cast iron, cast steel and forged steel in STM standards Carbon steel and alloy steel grades in ASTM, SAE and AISI standards In ASTM, SAE and AISI standards, carbon steel and alloy steel grades are basically the same.
1. Maraging heat-resistant steel - this kind of steel has a chromium content of 7 13%, below 650 has high high temperature strength, water vapor corrosion resistance, its disadvantage is that it is poor in weldability, such steel grades are: 1Cr11MoV, 1Cr12WMOV, 4Cr10Si2Mo, etc.
2. GH303GH3030 is a nickel-based alloy steel with excellent high-temperature oxidation resistance, corrosion resistance, thermal expansion resistance and high strength. It is usually used to make equipment such as high-temperature furnace tubes, high-temperature storage tanks, and high-temperature pipes. GH414GH4145 is also a nickel-based alloy steel that is more corrosion-resistant than GH3030.
3. The high-temperature resistant steel includes steel grade with 1Cr16Ni3 carburizing resistance and good nitriding resistance. 0Cr25Ni2 furnace materials, 2Cr25Ni20 reheated oxidation resistant steel, furnace parts, nozzles, combustion chambers.
4. High-temperature resistant die steel is a special steel with excellent high-temperature resistance, which is widely used in mold manufacturing in aerospace, automobile, electronics, chemical industry and other fields. The following will introduce several common high-temperature resistant die steels. H13 steel: H13 steel is a commonly used high-temperature resistant die steel with excellent heat resistance and wear resistance.
5. High silicon cast iron has good oxidation resistance and corrosion resistance under high temperature conditions, and is a commonly used high-temperature structural material. High silicon cast iron is suitable for high-temperature heat exchangers, gas water heaters and other fields.
In summary, high-temperature resistant steels play an important role in the field of high temperatures.
6. It has high strength and good corrosion resistance at high temperature, and is not easy to deform or break after long-term use.
Tungsten carbide Tungsten carbide is also a common high-temperature resistant steel, and its alloyed elements are mainly carbon and tungsten. It also has high hardness and wear resistance at high temperatures.