1. Q: What is the scope of DIN 17175 standard?
A: DIN 17175 applies to made of heat-resistant steels listed in the standard. These tubes are used in the manufacture of steam boilers, pipelines, pressure vessels, and instrumentation operating at temperatures up to 600℃, where high-temperature strength and specific oxidation resistance are required-3-4.
2. Q: Which steel grades are specified under DIN 17175?
A: The standard covers several heat-resistant steel grades. A commonly used one is 13CrMo44, a chromium-molybdenum alloy steel known for its use in pressure vessels
3. Q: What are the key material properties of 13CrMo44 alloy steel per DIN 17175?
A: 13CrMo44 alloy steel offers a combination of , along with good resistance to wear, fatigue, corrosion, and impact. It also possesses excellent workability and formability-2.
4. Q: What are the primary applications of DIN 17175 tubes?
A: These tubes are predominantly used in sectors requiring high-temperature and pressure resistance, such as -2.
5. Q: What are the main welding challenges for pipes made of materials like 13CrMo44?
A:hardening in the heat-affected zone (HAZ) and cold cracking. There is also a risk of during post-weld heat treatment or after prolonged exposure to high temperatures in service
