Section D - Nickel Base consumables
As a whole, nickel-base consumables have a very wide range of applications. They can be roughly divided into those with compositions matching specific parent materials, usually for corrosion resistance, and those with compositions unique to weld metal specifications some of which have specialised uses and others more general purpose applications.
Electrode characteristics vary according to the intended application and the constraints dictated by particular alloys. Most types have basic flux coverings, those with the suffix KS being suitable for positional welding of fixed pipework. Rutile flux systems are compatible with some of the high molybdenum corrosion-resistant alloys. A low level of impurities is desirable in all cases to minimise sensitivity to hot cracking and microfissuring.
The most important general purpose group are the 'Inconel' types, very loosely based on heat-resistant alloy 600 with 15%Cr-75%Ni-8%Fe. Compared with alloy 600, all these weld metals have significant additions of manganese and niobium which give resistance to hot cracking and raise hot strength. Nimrod 182/182KS have the highest manganese to maximise resistance to hot cracking, whereas in Nimrod AB/AKS manganese is partially replaced by molybdenum which has the additional effect of improving creep resistance. In many applications these two types can be used interchangeably, particularly in dissimilar metal welds between nickel base and most steels or other ferrous alloys. Useful service properties range from cryogenic up to elevated temperatures of 1000°C plus. Related to these is the more specialised heat resisting type Nimrod 132KS used primarily for welding 600 and similar materials in cast or wrought form.
Nimrod 625/625KS electrodes and 62-50 wires are designed to match alloy 625 which was originally developed for heat-resisting applications. However, parent material and consumables of this alloy have gained more widespread use for many applications exploiting its excellent pitting and crevice corrosion resistance and high strength at all service temperatures.
Electrode types Nimrod C276, C276KS, C22KS and Nimax B2L and complimentary solid wires match the current specifications for corrosion-resistant parent alloys C276, C22 and B2 respectively. Also related to this group is the higher alloy Nimrod 59KS, matching alloy 59. Their uses include overmatching welds for various superaustenitic stainless steels.
The precursor to alloy C276 was alloy C which is represented by rutile electrodes Nimrod C and the high efficiency type Nimax C. Their general corrosion resistance is useful for overlays and high work-hardening rate and thermal fatigue resistance for build-up and repair of hot-work dies.
Welding 5%Ni and 9%Ni steels for cryogenic service requires a combination of strength and toughness that cannot be obtained reliably using weld metal of similar composition. In practice dissimilar nickel base weld metal is used. Nimrod NCM6 is a high efficiency electrode particularly intended for this purpose, but others may be suitable alternatives depending on design requirements.
Nickel, nickel-copper (Monel^®) and cupronickel consumables are well established for use in high integrity fabrication welds between their respective parent alloys. For surfacing steels or dissimilar welds it should be noted that tolerance to iron dilution decreases with increasing copper content and the pure nickel type is therefore used as a buffer layer.
® Inconel and Monel are trademarks of Special Metals.

Column for gas processing plant – 20.70.Nb MIG wire

Data Sheet	Alloy	Process	Product	Specifications
				AWS	BS EN / BS EN ISO
D-10	182	MMA	Nimrod 182KS	ENiCrFe-3	E Ni6182
			Nimrod 182	ENiCrFe-3	E Ni6182
			Nimax 182	ENiCrFe-3	E Ni6182
		TIG/MIG/SAW	20.70.Nb	ERNiCr-3	SNi6082
D-11	AB	MMA	Nimrod AKS	ENiCrFe-2	E Ni6092
			Nimrod AB	ENiCrFe-2/4	E Ni6093
		TIG/MIG/SAW	20.70.Nb	ERNiCr-3	SNi6082
D-12	132	MMA	Nimrod 132KS	ENiCrFe-1	E Ni6062
D-20	625	MMA	Nimrod 625	ENiCrMo-3	E Ni6625
			Nimrod 625KS	ENiCrMo-3	E Ni6625
		TIG/MIG/SAW	62-50	ERNiCrMo-3	SNi6625
D-30	C276	MMA	Nimrod C276	ENiCrMo-4	E Ni6276
			Nimrod C276KS	ENiCrMo-4	E Ni6276
		TIG/MIG/SAW	HAS C276	ERNiCrMo-4	SNi6276
D-31	59	MMA	Nimrod 59KS	ENiCrMo-13	E Ni6059
		TIG/MIG	HAS 59	ERNiCrMo-13	SNi6059
D-32	C22	MMA	Nimrod C22KS	ENiCrMo-10	E Ni6022
		TIG/MIG	HAS C22	ERNiCrMo-10	SNi6022
D-40	617	MMA	Nimrod 617KS	ENiCrCoMo-1	E Ni6617
		TIG	61-70	ERNiCrCoMo-1	SNi6617
D-41	690	MMA	Nimrod 690KS	ENiCrFe-7	E Ni6152
D-50	Nickel	MMA	Nimrod 200Ti	ENi-1	E Ni2061
		TIG/MIG	Nickel 2Ti	ERNi-1	SNi2061
D-60	Monel	MMA	Nimrod 190	ENiCu-7	E Ni4060
		TIG/MIG/SAW	65NiCu	ERNiCu-7	SNi4060
D-70	Cupronickel	MMA	Cupromet N30	ECuNi	--
		TIG/MIG	70CuNi	ERCuNi	BS: C18
		TIG	90CuNi	--	BS C16
D-80	B2	MMA	Nimax B2L	ENiMo-7	E Ni1066
		TIG	HAS B2	ERNiMo-7	SNi1066
D-87	Dissimilar	MMA	EPRI P87	--	--
E-45	C	MMA	Nimrod C	(ENiCrMo-5)	DIN: E23-UM-200CKT
			Nimax C	(ENiCrMo-5)	DIN: E23-UM-200CKT

Walking beam furnace – Nimrod 182 used

Nickel Base 625 Alloy Strip

Alloy type

Strip matching the nickel base 625 alloy with typical composition of Ni-21%Cr-9%Mo-3.5%Nb.

Materials to be welded

Suitable for electroslag strip cladding with ES200 (datasheet F-50) and ES400 (data sheet F-52) flux.

Base materials being clad are most commonly those associated with pressure vessels eg. CMn boiler plate,

CrMo and CrMoV.

Applications

Originally developed to give high temperature strengthand structural stability, alloy 625 is also widely used for its resistance to general corrosion, pitting, crevice and stress corrosion cracking in severe chloride media.These properties are conferred by high levels of chromium, molybdenum and niobium, which also raise strength to the highest amongst standard nickel-basealloys.

Data Sheet	Alloy	Process	Product	Specifications
				AWS	BS EN / BS EN ISO
D-85	625	Strip Cladding	625 Strip	EQ62-50	EQNiCrMo-3