Universal High-Temperature Filler Metal for Welding Dissimilar High-Temperature Alloys
Learn to rely on only one weld rod for your high-temperature dissimilar welding needs – 556® weld rod. The HAYNES® 556® alloy displays excellent welding characteristics along with outstanding all-weld-metal (AWM) strength and corrosion resistance making it a “universal” filler metal for high-temperature dissimilar metal welding. The 556® filler metal typically possesses better high-temperature strength and corrosion resistance than the base metals being welded (i.e. performance might be limited by base metal properties instead of weld metal properties).
Possible Combinations
- Ni-base to Fe-base
- Fe-base to Fe-base
- Co-base to Fe-base
- Stainless Steel to C-steel
- Stainless Steel to Fe-base
- Stainless Steel to Co-base
- Stainless Steel to Ni-base
- C-steel to Fe-base
- C-steel to Ni-base
Weld Wire Sizes (Standard)
- Cut Lengths – 0.062, 0.094, 0.125 (in)
- Layer Wound – 0.035, 0.045, 0.062 (in)
Specifications
- AMS 5874 (sheet, plate and strip)
- AMS 5831 (wire)
- AMS 5877 (bars, forgings, and rings)
- ASTM B435 (sheet and plate)
- ASTM B622 (seamless pipe and tube)
- ASTM B626 (welded tubes)
- ASME Code Case No. 2010 Sec. 1 (sheet, plate, bar, pipe, and tube)
Nominal Composition
| Weight % | |
| Iron | Balance |
| Cobalt | 18 |
| Chromium | 22 |
| Molybdenum | 3 |
| Tungsten | 2.5 |
| Nickel | 20 |
| Tantalum | 0.6 |
| Nitrogen | 0.20 |
| Silicon | 0.4 |
| Manganese | 1 |
| Aluminum | 0.2 |
| Carbon | 0.10 |
| Lanthanum | 0.02 |
| Zirconium | 0.02 |
All-Weld Metal Rupture Properties
| Temperature | Rupture Properties: Stress Required to Produce Rupture in: | ||||||
| – | 100 h | 1,000 h | 10,000 (Est.) | ||||
| °F | °C | ksi | MPa | ksi | MPa | ksi | MPa |
| 1400 | 760 | 28.0 | 193 | 23 | 159 | 19 | 131 |
| 1600 | 870 | 16.0 | 110 | 11.5 | 79 | 8.5 | 59 |
Thermal Stability
| Room Temperature Tensile Properties of GTAW All-Weld Metal Following 1000 h Thermal Exposures* | ||||||
| Exposed Temperature | 0.2 % Yield Strength | Ultimate Tensile Strength | Elongation in 1.25 in | |||
| °F | °C | ksi | MPa | ksi | MPa | % |
| As-Welded | 70 | 483 | 110 | 758 | 36 | |
| 1200 | 650 | 72 | 496 | 117 | 807 | 24 |
| 1400 | 760 | 72 | 496 | 109 | 752 | 18 |
| 1600 | 870 | 59 | 407 | 109 | 752 | 23 |
Typical Room Temperature Physical Properties
| Physical Property | Customary Units | Metric Units |
| Density |
0.297 lb/in3 |
8.23 g/cm3 |
| Electrical Resistivity | 37.5 µohm-in | 95.2 µohm-cm |
| Dynamic Modulus of Elasticity |
29.7 x 106 psi |
206 GPa |
| Thermal Conductivity |
77 Btu-in/ft2-h-°F |
11.1 W/m-°C |
| Specific Heat | 0.111 Btu/lb-°F | 464 J/kg-°C |
Environmental Resistance
- Oxidation in Air – Excellent at 2000°F (1095°C)
- Chlorination – Very good to 1650°F (900°C)
- Sulfidation – Second only to Co-base alloys
- Molten Zinc – Best Available
- Molten Chloride Salts – Equal to alloy X