Description: AFM 625 is used for welding nickel-chromium-molybdenum alloy (625) to itself, to
steel, to other nickel-base alloys (601 & 800), for cladding steel with nickel-chromium-molybdenum weld metal, and for welding the clad side of joints in steel with nickel-chromium-molybdenum alloy using the GTAW, GMAW, SAW, and PAW processes. AFM 625¡¯s outstanding strength and toughness in the temperature range cryogenic to 2000¡ÆF (1093¡ÆC) are derived primarily from the solid solution effects of the refractory metals, columbium and molybdenum, in a nickel-chromium matrix. AFM 625 has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions.
Chemical Composition Requirements for Undiluted Weld Metal: |
| (AL) |
Aluminum |
0.40 |
(C) |
Carbon |
0.10 |
| (Cr) |
Chromium |
20.0 to 23.0 |
| (Cu) |
Copper |
0.50 |
| (Fe) |
Iron |
5.0 |
| (Mn) |
Manganese |
0.50 |
(Mo) |
Molybtenum |
8.0 to 10.0 |
| (Ni) |
Nickel |
58.0 min* |
| (Nb + Ta) |
Niobium & Tantalum |
3.15 to 4.15 |
(P) |
Phosphorus |
0.02 |
(S) |
Sulfer |
0.015 |
| (Si) |
Silicon |
0.50 |
| (Ti) |
Titanium |
0.40 |
|
All Other |
0.50 |
* Includes incidental cobalt
All values are considered maximum, unless other-wise noted.
Typical As-Welded Tensile Strengths (min.):
- Tensile Strength, psi - 110,000
- MPa - 760
- Elongation, (%) 30
Standard Sizes: 36¡± TIG-1/16 (1.6), 3/32 (2.4), 1/8 (3.2), & 5/32 (4.0) 30# spools-.035 (1.0), .045 (1.2), & 1/16 (1.6)
Corresponding Classification in AWS A5.11 is AFM 112
ENiCrMo-3. |
