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X20H30YUS

Nichrome Cr20H30YUS (GS-40)

This grade is one of the most popular in the production of heating elements. According to the designation regulated by GOST, the chemical composition of the alloy includes chromium, nickel, aluminum, carbon. In addition, the alloy is alloyed with the following elements: manganese, silicon, titanium. The basis is iron.
ALLOY Ni30Cr20
Material 1.4725
Designation Cr15Al5
DIN 17 470
UNS designation K 92 500
ASTM B 603-1
AMS ---
CHEMICAL COMPOSITION, (%)
Chrome, (Cr) 19.0- 21.5
Aluminum, (Al) ≤ 0.3
Carbon, (C) ≤ 0.06
Nickel, (Ni) 30.0 - 31.5
Manganese, (Mn) ≤ 1.0
Silicon, (Si) 1.80 - 3.00
Copper, (Cu) ---
Titanium, (Ti) Max 0.6
Iron, (Fe) Base
The rest Zr, (Fe) Max 0.3
MECHANICAL PROPERTIES AT ROOM TEMPERATURE
Number of bends, (times) > 7
Relative elongation, % > 20
PHYSICAL PROPERTIES AT ROOM TEMPERATURE
Density, gr/cm³ 8,3
Hardness, HB 200-260
Tensile strength, MPa 637-784
Specific electrical resistance, Ohm*mm2/m 1.12
Maximum operating temperature, deg (ºС) 1100
Melting temperature, deg (ºС) 1390
Magnetic qualities Low magnetic material
SERVICE LIFE
Ø 6.0 mm and more tº =1100°C > 3500 hours
Ø 3.0-6.0mm t º =1500 ºC >1800 hours
Ø 1.5-3.0 mm t º =1500 ºC > 1800 hours
Ø 0.4-1.5mm t º =1050 ºC > 900 hours
MATERIAL DESCRIPTION:
- High corrosion resistance in air, oxidizing environments, vacuum;
MAIN APPLICATIONS: Firing and drying furnaces, high-temperature furnaces, resistance elements, heaters, industrial heating elements.

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