3439 - Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories
Description / Abstract:
The purpose of this specification is to ensure acquisition of nickel alloy
filler metals meeting the minimum standards of quality control and chemical
composition as specified herein. The minimum mechanical properties indicated
herein represent controlled minimum properties used as the basis of acceptance
from lot to lot of filler metal. These values also are considered
representative of what can be expected when welding, under controlled
conditions, base plates of compositions similar to those of the filler metal,
where such compositions are available in wrought forms. Since this
specification provides for the welding of these materials to themselves, for
joining clad materials and for dissimilar welding of alloys to ordinary steel
or corrosion resisting steels of the AISI 300 and 400 series, the mechanical
property requirements indicated herein will generally not be suitable for
design purposes. In such instances it is recommended that pilot weld tests be
made representative of the welding procedures and alloys involved to establish
mechanical properties for representative joints contemplated and made under
Types MIL-EN60 and MIL-RN60 are recommended for welding nickel-copper
alloy to itself and to steel, welding the clad side of nickel-copper alloy
clad steel, and for overlaying nickel-copper alloy on steel. For certain
overlaying applications, a barrier layer of nickel is required below the
nickel-copper alloy overlay, and the manufacturer should be consulted.
Types MIL-EN61 and MIL-RN61 are recommended for the welding of nickel to
itself, welding the clad side of nickel clad steel, and overlaying nickel on
Types MIL-EN62 and MIL-RN62 are recommended for welding
nickel-chromium-iron alloy to itself.
Types MIL-EN64 and MIL-RN64 are recommended for welding
nickel-copper-aluminum alloy to itself. The deposited weld metal is
age-hardenable, although the increment from age-hardening and mechanical
properties to be expected after welding and aging will be lower than values
obtainable from wrought material.
Type MIL-RN65 is recommended for the GTA welding of
nickel-iron-chromium-molybdenum-copper alloy to itself. GMA welding of this
material is not recommended.
Types MIL-EN67 and MIL-RN67 are recommended for the welding of 70-30,
80-20 and 90-10 copper-nickel alloys to themselves and to steel.
Type MIL-RN69 is recommended for the tungsten-arc welding of
nickel-chromium-iron-titanium-aluminum-columbium to itself. The deposited weld
metal is age-hardenable, although the increment from age-hardening and
mechanical properties to be expected after welding and aging will be lower
than values obtainable from wrought material.
Types MIL-EN6A and MIL-RN6A are recommended for the welding of
nickel-chromium-iron-titanium-manganese alloys to steel, for overlaying
nickel-chromium-iron alloy on steel, and for joining various heat and
corrosion resistant alloys to each other and to steel and for welding the clad
side of nickel-chromium-iron alloy clad steel.
Types MIL-EN6N and MIL-RN6N are recommended for joining of 80-20
nickel-chromium alloys to themselves, and for over-laying nickel-chromium
alloy on steel.
Types MIL-EN82, MIL-EN82H, MIL-RN82 and MIL-RN82H are recommended for
welding of nickel-chromium-iron alloy to itself and to steel, for overlaying
nickel-chromium-iron alloy on steel, and for welding the clad side of Ni-Cr-Fe
alloy clad steel.
Types MIL-EN625 and MIL-RN625 are recommended for welding of
nickel-chromium-molybdenum-columbium alloy to itself and to steel and the
overlaying of nickel-chromium-molybdenum-columbium alloy on steel.
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