Prashaant Steel & Alloys

A precipitation-hardenable nickel-chromiumcobalt alloy having high stress-rupture strength and creep resistance at temperatures to about 1700°F (920°C). The alloy also has good resistance to high-temperature corrosion and oxidation. Used for blades and discs in gas turbines, hot-working tools and springs.

STANDARD PRODUCT FORMS
Sheet, strip, plate, round bar, flat bar, forging stock, wire and extruded section.

MAJOR SPECIFICATIONS
UNS N07090, BS HR2, HR202, HR402,,HR501 – HR503, Werkstoff Nr. 2.4632
AECMA Pr EN 2295 – 2299, 2400, 2401,2669, 2670

LIMITING CHEMICAL COMPOSITION, %
Limiting
Ni .......Remainder
Cr ......18.0 – 21.0
Co .....15.0 – 21.0
Ti ...........2.0 – 3.0
Al ...........1.0 – 2.0
C ..........0.13 max.
Si ...........1.0 max.
Cu..........0.2 max.
Fe ..........1.5 max.
Mn .........1.0 max.
B ..........0.02 max.
S .......0.015 max.
Zr .........0.15 max.

PHYSICAL CONSTANTS AND THERMALPROPERTIES
Density, Ib/in3........................................................................0.296
g/cm3.........................................................................8.18
Melting Range, °F...................................................2390 –2500
°C ...................................................1310– 1370
Specific Heat, Btu/lb • °F....................................................0.107
J/kg • °C...........................................................446
Permeability at 200 Oersted (15.9 kA/m).................1.0706
Coefficient of Expansion, 68 – 212°F, 10-6in/in • °F........7.1
20 – 100°C, µm/m • °C .........12.7
Thermal Conductivity, Btu • in/ft2 • h • °F..........................79.7
W/m • °C..........................................11.5
Electrical Resistivity, ohm • circ mil/ft...............................710
µ Ω• m................................................1.18
TYPICAL MECHANICAL PROPERTIES

A nickel-chromium-cobalt alloy that is precipitation hardenable and also contains a relatively high (7%) level of molybdenum for solid-solution strengthening. It has an exceptional combination of high-temperature strength, creep resistance and ductility when welded. The alloy is especially suitable for welded sheet structures. Used in gas turbines for flame tubes and other components.

STANDARD PRODUCT FORMS
Sheet, plate, round bar, flat bar, forging stock, and extruded section.

MAJOR SPECIFICATIONS
None applicable.

LIMITING CHEMICAL COMPOSITION, %
Ni .......Remainder
Cr......16.0 – 20.0
Co .....12.0 – 16.0
Mo .........5.0 – 9.0
Ti ...........1.5 – 3.0
Al ...........1.7 – 2.5
C ..........0.07 max.
Si ...........0.5 max.
Cu..........0.2 max.
Fe ..........1.0 max.
Mn .........0.5 max.
S .......0.015 max.
B .......0.005 max.
Zr .........0.06 max.

PHYSICAL CONSTANTS AND THERMAL PROPERTIES
Density, Ib/in3
........................................................................0.297g/cm3
.........................................................................8.21
Melting Range, °F
...................................................2340 –
2450
°C ...................................................1300
– 1345
Specific Heat, Btu/lb • °F
....................................................0.100
J/kg • °C
...........................................................419
Permeability at 200 Oersted (15.9 kA/m)
.................1.0005
Coefficient of Expansion, 68 – 212°F, 10-6
in/in • °F........6.7
20 – 100°C, µm/m • °C .........12.1
Thermal Conductivity, Btu • in/ft2 • h • °F

..........................78.3
W/m • °C ..........................................11.3
Electrical Resistivity, ohm • circ mil/ft
...............................758
µ Ω• m
................................................1.26
TYPICAL MECHANICAL PROPERTIES
(Annealed)
Tensile Strength, ksi
...................................................120 -
140
MPa ................................................827 -
965
Yield Strength (0.2% Offset), ksi
.................................40 - 60
MPa .........................276 - 414
Elongation, %
....................................................................40
– 60
(Cold Worked)
Tensile Strength, ksi
...................................................160 –
260
MPa ...........................................1103 – 1792
Yield Strength (0.2% Offset), ksi
............................120 - 240
MPa .......................827 – 1655
Elongation, %
....................................................................10
– 30
(Cold Worked + Aged)
Tensile Strength, ksi
...................................................180 –
280
MPa ...........................................1241 –
1930
Yield Strength (0.2% Offset), ksi
............................170 – 270
MPa ....................1172 - 1861
Elongation, %
....................................................................10
– 20

Nimonic C263 Sheet: A Comprehensive Guide to Properties, Applications, and International Standards

Nimonic C263 is a high-performance superalloy renowned for its exceptional strength, heat resistance, and corrosion resistance, making it a preferred choice in various demanding applications across industries. In this article, we delve into the properties, applications, and international standards associated with Nimonic C263 sheet.

Properties of Nimonic C263 Sheet:
Nimonic C263 sheet exhibits remarkable mechanical properties even at elevated temperatures. It offers high strength combined with excellent creep and oxidation resistance. Some key properties include:
High Temperature Strength: Nimonic C263 maintains its strength at temperatures up to 815°C (1500°F), making it suitable for high-temperature applications.
Oxidation Resistance: The alloy shows exceptional resistance to oxidation at elevated temperatures, ensuring prolonged service life in harsh environments.
Creep Resistance: Nimonic C263 demonstrates good creep resistance, maintaining structural integrity under prolonged stress at elevated temperatures.
Corrosion Resistance: It offers excellent corrosion resistance in various environments, including high-temperature and corrosive atmospheres.

Applications of Nimonic C263 Sheet:
Nimonic C263 finds widespread applications across industries where high temperature, corrosion resistance, and strength are crucial. Some common applications include:
Aerospace Industry: Nimonic C263 is extensively used in aircraft engine components such as turbine blades, combustors, and afterburner parts due to its high-temperature strength and creep resistance.
Gas Turbines: The alloy is utilized in gas turbine components like turbine wheels, casings, and exhaust systems owing to its exceptional high-temperature properties.
Petrochemical Industry: Nimonic C263 sheet is employed in petrochemical processing equipment such as heat exchangers and furnace components due to its corrosion resistance in harsh chemical environments.
Power Generation: It is used in power generation applications including turbine discs and blades, where high temperature and mechanical strength are critical for performance and reliability.

International Standards and Equivalent Grades:
Nimonic C263 complies with various international standards to ensure quality and compatibility in different applications. Some of the notable standards include:
AMS: The alloy meets the specifications outlined by Aerospace Material Specifications (AMS).
ASTM: Nimonic C263 conforms to ASTM standards, particularly ASTM B637 for sheet, plate, and bar.
UNS: It is assigned the Unified Numbering System (UNS) designation N07263.
EN/DIN: Nimonic C263 sheet is recognized under European (EN) and German (DIN) standards.

Equivalent Grades:
Equivalent grades of Nimonic C263 sheet may vary depending on the specific standards and regional preferences. Some commonly referenced equivalent grades include:
Werkstoff: 2.4650
AFNOR: Nimonic90
ISO: Nimonic C-263
JIS: Nimonic 263
GB: GH2631

In conclusion, Nimonic C263 sheet offers an impressive combination of high temperature strength, corrosion resistance, and creep resistance, making it indispensable in demanding applications across industries. With adherence to international standards and availability of equivalent grades, Nimonic C263 ensures reliability and performance in diverse environments.