This document provides information on nickel-iron welding electrodes for joining cast iron materials. The nickel-iron alloy electrodes are suitable for welding all grades of cast iron, including spheroidal graphite irons and ductile irons. They provide strength, ductility and toughness comparable to cast iron, as well as good machinability. Welding guidelines recommend cleaning surfaces and potentially preheating, though welding can often be done without preheating. The document describes the compositions and properties of specific nickel-iron electrode products for manual metal arc welding of cast iron.
This document provides information on nickel-iron welding electrodes for joining cast iron materials. The nickel-iron alloy electrodes are suitable for welding all grades of cast iron, including spheroidal graphite irons and ductile irons. They provide strength, ductility and toughness comparable to cast iron, as well as good machinability. Welding guidelines recommend cleaning surfaces and potentially preheating, though welding can often be done without preheating. The document describes the compositions and properties of specific nickel-iron electrode products for manual metal arc welding of cast iron.
This document provides information on nickel-iron welding electrodes for joining cast iron materials. The nickel-iron alloy electrodes are suitable for welding all grades of cast iron, including spheroidal graphite irons and ductile irons. They provide strength, ductility and toughness comparable to cast iron, as well as good machinability. Welding guidelines recommend cleaning surfaces and potentially preheating, though welding can often be done without preheating. The document describes the compositions and properties of specific nickel-iron electrode products for manual metal arc welding of cast iron.
This document provides information on nickel-iron welding electrodes for joining cast iron materials. The nickel-iron alloy electrodes are suitable for welding all grades of cast iron, including spheroidal graphite irons and ductile irons. They provide strength, ductility and toughness comparable to cast iron, as well as good machinability. Welding guidelines recommend cleaning surfaces and potentially preheating, though welding can often be done without preheating. The document describes the compositions and properties of specific nickel-iron electrode products for manual metal arc welding of cast iron.
Alloy type If welding is carried out without preheat it is desirable to
minimise the width of the HAZ by using a low heat input Nominally Fe-55% Ni alloy for the repair and joining of and low interpass temperature. A skip welding technique cast iron. can be beneficial in helping to achieve this. Materials to be welded For thicker section welds and highly restrained welds ASTM BS preheat in the range 150-250°C may be necessary. Light A602, A47, A338, A220 2789 – SG irons peening to reduce contraction stresses can also be 6681 – Ductile irons beneficial but care should be taken not to exhaust the ductility of the weld metal. Applications Buttering the joint faces, or sides of the repair cavity, The NiFe alloy is suitable for welding all grades of cast prior to filling can also be desirable whether a preheat is iron but particularly for spheroidal graphite (SG), used or not. nodular or ductile irons and some alloy cast irons. It On completion of welding the workpiece should be provides compatible strength, ductility and toughness, allowed to cool slowly, using insulation if necessary. coupled with good machinability. Additional information The NiFe consumables can also be used on some of the high alloy austenitic irons (Ni-Resist). The flake The NiFe weld metals produce higher strength than the graphite grades are welded with a preheat of 300-350°C pure nickel cast iron types and are therefore preferable for but the SG grades are best buttered using low heat input, dissimilar joints, nodular irons and higher strength cast and low temperature techniques to avoid HAZ hot irons. The NiFe types are also less sensitive to hot cracking. cracking caused by pick-up of impurities such as phosphorus which are often present in castings. The low Note the martensitic Ni-Hard cast irons and white irons matrix contraction coefficient of NiFe is also enhanced in are generally considered to be unweldable because they the higher carbon electrode deposits by expansion are too crack-sensitive. accompanying graphite precipitation and results in lower The NiFe consumables are also suitable for welding stresses in heavy repairs; the possibility of cold cracking transition joints between cast iron and cast steels, and is therefore reduced. cast iron and mild/low alloy steels. Related alloy groups Typical components are machine bases, pump bodies, engine blocks, gears and transmission housings. The pure nickel types (data sheet E-10) are also used for welding cast iron. Welding guidelines Products available Welding is often carried out without preheat but heavy multipass deposits or highly restrained joints may require Process Product Specification preheat 150-250°C. MMA CI Special Cast NiFe AWS ENiFe-CI Prior to welding surfaces should be prepared by careful CI-Met NiFe AWS ENiFe-CI gouging and/or grinding using limited amounts of heat to MIG 55NiFe BS NA47 avoid propagating cracks. The area to be welded should be cleaned as far as practicable from sand, oil, grease, paint or rust. Preheating can help to remove impregnated oil on used castings which are being repaired.
Rev 04 10/03 DS: E-11 (pg 1 of 3)
General Data for all MMA Electrodes Storage 3 hermetically sealed ring-pull metal tins per carton, with unlimited shelf life. Direct use from tin is satisfactory. For electrodes that have been exposed: Redry 100 – 150°C/1-2h to restore to as-packed condition. Maximum 150° C, 3 cycles, 10h total. Storage: Recommended ambient storage conditions for opened tins (using plastic lid): < 60% RH, > 18°C.
Fume data Fume composition, wt % typical:
3 Fe Mn Ni Cr Cu F Ba OES (mg/m ) 3.5 1 2 <0.2 <0.5 12 <0.5 5
CI SPECIAL CAST NiFe NiFe MMA electrode for most grades of cast iron Product description MMA electrode with special basic-graphite flux (no barium compounds) on a 55%Ni alloy core wire. Good refining action provides maximum resistance to cracking and freedom from porosity. Recovery is about 95% with respect to core wire, 70% with respect to whole electrode.
Specifications AWS A5.15 ENiFe-CI
BS EN 1071 E C NiFe-CI 1 DIN 8573 (E NiFe-1 BG)
ASME IX Qualification QW432 F-No --
Composition C Mn Si S P Fe Ni Al Cu (weld metal wt %) min -- -- -- -- -- bal 45.0 -- -- max 2.0 2.5 2.0 0.03 0.03 bal 60.0 1.0 2.5 typ 0.5 1.5 0.5 0.010 0.005 42 55 <0.1 <0.1
CI-MET NiFe NiFe MMA electrode on bi-metallic core wire
Product description MMA electrode with special basic-graphite flux (no barium compounds) on bi-metallic Fe clad Ni core wire. Good refining action provides maximum resistance to cracking and freedom from porosity. The bi-metallic core wire minimises the risks of over-heating normally associated with NiFe MMA electrodes and produces excellent operability. Recovery is about 95% with respect to core wire, 70% with respect to whole electrode.
Specifications AWS A5.15 ENiFe-CI
BS EN 1071 E C NiFe-CI 1 DIN 8573 (E NiFe-1 BG)
ASME IX Qualification QW432 F-No --
Rev 04 10/03 DS: E-11 (pg 2 of 3)
CI-MET NiFe (continued) Composition C Mn Si S P Fe Ni Al Cu (weld metal wt %) min -- -- -- -- -- bal 45.0 -- -- max 2.0 2.5 2.0 0.03 0.03 bal 60.0 1.0 2.5 typ 0.5 1.5 0.5 0.010 <0.01 42 55 <0.1 <0.1
Composition C Mn Si S P Ni Fe Cu Co (wire wt %) min -- -- -- -- -- 52.0 bal -- -- max 0.15 1.0 0.5 0.02 0.03 60.0 bal 0.5 2.0 typ 0.05 0.7 0.2 <0.01 <0.01 58 40 0.01 0.05
All-weld mechanical Typical values as welded MIG (Ar-5%CO2)
Oxy-Acetylene Welding and Cutting
Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon
