HAYNES® 556® RTW™ Filler Metal

Product Description:

HAYNES® 556 RTW™ filler metal is used for the gas metal arc and gas tungsten arc welding of HAYNES® HR-120® alloy to itself. The alloy is also a great candidate for dissimilar welding of other high-temperature alloys including HR-160® alloy and other nickel and cobalt high-temperature materials. The weld metal has excellent resistance to high-temperature corrosive environments including WTE, heart-treating, refinery and boiler applications. The RTW™ filler metal finish on the spooled wire promotes smooth feeding through welding equipment and reduced tip wear in contact tips.


AMS 5831                UNS R30566
AWS A5.9 ER3556


Iron: Remainder
Chromium: 21.0-23.0
Nickel: 19.0-22.5
Cobalt: 16.0-21.0
Molybdenum: 2.5-4.0
Tungsten: 2.0-3.5
Manganese: 0.50-2.0


Tantalum: 0.30-1.25
Silicon: 0.80 max.
Aluminum: 0.50 max.
Nitrogen: 0.30 max.
Niobium: 0.30 max.
Carbon: 0.15 max.
Zirconium: 0.15 max.


Lanthanum: 0.10 max.
Phosphorus: 0.04 max.
Boron: 0.02 max.
Sulfur: 0.015 max.

Minimal Mechanical Properties

Tensile (psi) 107,300
Mpa 740
Elongation (%) 43.1

Available Product Forms and Sizes:

Diameter in 0.030 0.031 0.035 0.039 0.045 0.047 0.062 0.078 0.093 *0.125 *0.156x 0.187x
Diameter mm 0.76 0.80 0.89 1.00 1.10 1.20 1.60 2.00 2.40 *3.20 *4.00x *4.70x

Filler metals are available in MIG spools, TIG cut lengths, reels, and coils from the above diameters.

*Size not available in MIG spools.

˟Size not available on reels.

Standard TIG straight lengths are available in 36” (914mm) lengths. Other lengths available upon request.