UTP A 4221
Classifications solid wire
EN ISO 18274 AWS A5.14
S Ni 8065 (NiFe30Cr21Mo3) ER NiFeCr-1 (UNS N08065)
Characteristics and field of use
UTP A 4221 is suitable for joining and surfacing of alloys of similar nature, furthermore
for welding of CrNi-MoCu-alloyed austenitic steels used for high quality tank and apparatus
construction in the chemical industry, corrosion resistance in media of sulphuric and
phosphoric acid.
UTP A 4221 is specially designed for welding alloy 825 (2.4858, UNS N08825).
Fully austenitic weld metal with high resistance against stress corrosion cracking and
pitting in media containing chloride ions. Good corrosion resistance against reducing acids
due to the combination of Ni, Mo and Cu. Sufficient resistance against oxidizing acids. The
weld metal is corrosion resistant in sea water.
Typical analysis in %
C Si Mn Cr Ni Mo Cu Fe
0,01 0,25 0,8 20,5 41,0 3,1 1,8 balance
Mechanical properties of the weld metal
Yield strength RP0,2 Tensile strength Rm Elongation A Impact strength KV
MPa MPa % J [RT]
360 > 550 > 30 > 100
Welding instruction
The welding area has to be free from inpurities (oil, paint, markings). Minimize heat input.
The interpass temperature should not exceed 120 °C.
Form of delivery and recommended welding parameters
Wire diameter (mm) Current type Shielding gas (EN ISO 14175)
1,2 DC (+) I 1