Designation: HASTELLOY C-4
| UNS number | N06455 |
| US name | ASTM Grade N06455 |
| EN name | NiMo16Cr16Ti |
| EN number | 2.461 |
| JIS (Japanese) name | NW 6455 (various standards) |
| Tradenames: HASTELLOY C-4 |
| HASTELLOY C-4, Haynes International Inc. (USA) |
| Typical uses: HASTELLOY C-4 |
| Chemical processing |
Composition detail : HASTELLOY C-4
| C (carbon) | 0 | – | 0.015 | % |
| Co (cobalt) | 0 | – | 2 | % |
| Cr (chromium) | 14 | – | 18 | % |
| Fe (iron) | 0 | – | 3 | % |
| Mn (manganese) | 0 | – | 1 | % |
| Mo (molybdenum) | 14 | – | 17 | % |
| Ni (nickel) | 57.9 | – | 72 | % |
| P (phosphorus) | 0 | – | 0.04 | % |
| S (sulfur) | 0 | – | 0.03 | % |
| Si (silicon) | 0 | – | 0.08 | % |
| Ti (titanium) | 0 | – | 0.7 | % |
| Other | 0 | – | 0.2 | % |
Density: HASTELLOY C-4
| Density | 8.6e3 | – | 8.7e3 | kg/m^3 |
Mechanical properties: HASTELLOY C-4
| Young’s modulus | 207 | – | 215 | GPa |
| Specific stiffness | 23.9 | – | 24.9 | MN.m/kg |
| Yield strength (elastic limit) | 310 | – | 440 | MPa |
| Tensile strength | 705 | – | 865 | MPa |
| Specific strength | 35.8 | – | 50.9 | kN.m/kg |
| Elongation | 45 | – | 70 | % strain |
| Compressive strength | 310 | – | 440 | MPa |
| Flexural modulus | 207 | – | 215 | GPa |
| Flexural strength (modulus of rupture) | 310 | – | 440 | MPa |
| Shear modulus | 75 | – | 85 | GPa |
| Bulk modulus | 155 | – | 180 | GPa |
| Poisson’s ratio | 0.28 | – | 0.3 | |
| Shape factor | 28 | |||
| Hardness – Vickers | 170 | – | 220 | HV |
| Hardness – Rockwell B | 85 | – | 95 | HRB |
| Hardness – Rockwell C | 4 | – | 16 | HRC |
| Hardness – Brinell | 164 | – | 207 | HB |
| Elastic stored energy (springs) | 234 | – | 447 | kJ/m^3 |
| Fatigue strength at 10^7 cycles | 280 | – | 435 | MPa |
| Fatigue strength model (stress range) Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles | 259 | – | 470 | MPa |
Impact & fracture properties
| Fracture toughness | 325 | – | 361 | MPa.m^0.5 |
| Toughness (G) | 500 | – | 616 | kJ/m^2 |
Thermal properties: HASTELLOY C-4
| Melting point | 1.32e3 | – | 1.38e3 | °C |
| Maximum service temperature | 910 | – | 1.04e3 | °C |
| Minimum service temperature | -273 | °C | ||
| Thermal conductivity | 9 | – | 11.5 | W/m.°C |
| Specific heat capacity | 395 | – | 415 | J/kg.°C |
| Thermal expansion coefficient | 9.5 | – | 12 | µstrain/°C |
| Thermal shock resistance | 133 | – | 201 | °C |
| Thermal distortion resistance | 0.808 | – | 1.12 | MW/m |
| Latent heat of fusion | 280 | – | 300 | kJ/kg |
Electrical properties: HASTELLOY C-4
| Electrical resistivity | 122 | – | 128 | µohm.cm |
| Electrical conductivity | 1.35 | – | 1.41 | %IACS |
| Galvanic potential | -0.07 | – | 0.01 | V |
Processing properties: HASTELLOY C-4
| Metal casting | Unsuitable |
| Metal cold forming | Excellent |
| Metal hot forming | Excellent |
| Metal press forming | Excellent |
| Metal deep drawing | Unsuitable |
| Machining speed | 4.88 m/min |
| Weldability Preheating and post weld heat treatments are not required | Excellent |
| Weldability – MIG | Good |
| Weldability – plasma | Good |
| Weldability – SAW | Not recommended |
| Weldability – TIG | Good |
| Brazeability | Good |
Durability: HASTELLOY C-4
| Water (fresh) | Excellent |
| Water (salt) | Excellent |
| Weak acids | Excellent |
| Strong acids | Excellent |
| Weak alkalis | Excellent |
| Strong alkalis | Excellent |
| Organic solvents | Excellent |
| Oxidation at 500C | Excellent |
| UV radiation (sunlight) | Excellent |
| Galling resistance (adhesive wear) Bronze or zinc alloy dies should be used to minimize galling | Limited use |
| Flammability | Non-flammable |
Corrosion resistance: HASTELLOY C-4
| Stress corrosion cracking Rated in chloride; Other susceptible environments: Hydroxide | Not susceptible |
| Intergranular (weld line) corrosion | Excellent |
| Inorganic acids | Excellent |
| Organic acids | Good |
| Alkalis | Excellent |
| Humidity / water | Excellent |
| Sea water | Excellent |
| Sour oil and gas | Excellent |
Equiavelent Grades / Similar Compositions: HASTELLOY C-4
| International: NiCr16Mo16Ti to ISO 6208, NICr16Mo16Ti to ISO 9723, NiCr16Mo16Ti to ISO 9724, NiCr16Mo16Ti to ISO 9725, NiMo16Cr16Ti to ISO 6207, NW6455 to ISO 6207, NW6455 to ISO 6208, NW6455 to ISO 9723, NW6455 to ISO 9724, NW6455 to ISO 9725 |
| Japan: NW6455 to JIS H4551, NW6455 to JIS H4552, NW6455 to JIS H4553, NW6455 to JIS H4554 |
| UK: NA45 to BS 2901/5 |
| USA: ERNiCrMo-7 to AWS A5.14/A5.14M, N06455 to ASTM B574, N06455 to ASTM B575, N06455 to ASTM B619, N06455 to ASTM B622, N06455 to ASTM B626, UNS N06455 |
| Tradenames: DELORO NISTELLE C 4 C, HASTELLOY ALLOY C-4, NICROFER B 6616-WS C-4, NICROFER S 6616-FM C-4, UTP 704 KB |
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