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Willkommen - Welcome
Willkommen - Welcome
Willkommen
Willkommen - Welcome
Willkommen - Welcome
Willkommen - Welcome
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Welcome - Willkommen
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Sinered strip electrodes
NT® Sintered strip electrodes
Manufacture and features
Powder-metallurgical strip electrodes have been specially developed for weld surfacing in the production of wear-resistant and high-temperature-resistant claddings by the submerged-arc and RES weld-surfacing process.
An essential advantage of the sintering process is the production in only four manufacturing steps: mixing, rolling, sintering, and cutting. Furthermore, only dry powders without water-binder suspensions are used; thus, the need for cost-intensive drying is avoided. The combination of these two factors results in a favourable cost-performance ratio. The use of sintered strip electrodes produced by powder-metallurgical methods is steadily gaining importance for the aforementioned purposes.
| Brand NT® corrosion-resistant | Standard analysis of the pure weld metal % | ||||||
| NT® - Fe 309 L | C: 0,010 Cr: 23,0 |
Ni: 12,0 Mo: 0,2 |
Mn: 1,8 Si: 0,4 |
N: + | |||
| NT® - Fe 308 L | C: 0,010 Cr: 20,0 |
Ni: 10,5 Mo: <0,2 |
Mn: 1,8 Si: 0,4 |
N: + | |||
| NT® - Fe 309 MoL | C: 0,015 Cr: 22,0 |
Ni: 14,0 Mo: 2,9 |
Mn: 1,8 Si: 0,3 |
N: + | |||
| NT® - Fe 309 LNb | C: 0,015 Cr: 24,0 |
Ni: 12,0 Mn: 1,8 |
Si: 0,6 Nb: 0,6 |
N: 0,03 | |||
| NT® - Fe 316 L | C: 0,010 Cr: 18,0 |
Ni: 13,0 Mo: 2,7 |
Mn: 1,5 Si: 0,3 |
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| NT® - Fe X 15 CrNiMn 32 27 8 | C: 0,140 Cr: 32,0 |
Ni: 27,0 Mn: 7,5 |
Si: 0,3 N: + |
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| Brand NT® abrasion-resistant | Standard analysis of the pure weld metal % | ||||||
| NT® - Fe 1.4370 | C: 0,06 Cr: 18,0 |
Ni: 8,0 Mn: 6,0 |
Si: 0,5 | ||||
| NT® - Fe 1.4351 RES | C: 0,10 Cr: 15,0 |
Ni: 4,3 Mo: 0,90 |
Mn: 0,90 Si: 0,34 |
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| NT® - Fe 581 | C: 0,35 Cr: 6,0 |
Mo: 3,0 Mn: 2,0 |
Si: 0,3 V: 0,3 |
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| NT® - Fe 601 | C: 0,31 Cr: 7,0 |
Ni: 0,3 Mo: 1,60 |
Mn: 3,0 W: 1,9 |
V: 0,2 | |||
| NT® - Fe 410 NiMo | C: 0,06 Cr: 14,0 |
Ni: 4,5 Mo: 0,90 |
Mn: 0,8 V: 0,2 |
Nb: 0,2 | |||
| NT® - Fe 410 MoV | C: 0,15 Cr: 12,4 |
Mo: 2,0 Mn: 1,2 |
V: 0,2 Nb: 0,2 |
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| NT® - Fe 430 L | C: 0,06 Cr: 13,0 |
Ni: 4,0 Mo: 0,30 |
Mn: 1,2 V: 0,2 |
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| NT® - Fe X 38 CrMo 13/1 | C: 0,38 Cr: 13,6 |
Ni: 0,4 Mo: 0,15 |
Mn: 1,0 Si: 0,2 |
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| Brand NT® nickel basis | Standard analysis of the pure weld metal % | ||||||
| NT® - Ni 276 | C: 0,01 Cr: 15,8 |
Ni: Rest Mo: 16,6 |
Mn: 0,5 Nb: 0,1 |
W: 3,7 Fe: 4,5 |
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| NT® - Ni 600 | C: 0,01 Cr: 19,9 |
Ni: Rest Mn: 3,2 |
Nb: 2,3 Ti: 0,4 |
Fe: 0,7 | |||
| NT® - Ni 625 | C: 0,01 Cr: 23,0 |
Ni: Rest Mo: 9,0 |
Mn: 0,2 Nb: 3,5 |
Fe: <5,0 | |||
| NT® - Ni 686 | C: 0,015 Cr: 21,0 |
Ni: Rest Mo: 16,0 |
Mn: 0,8 Si: 0,2 |
Fe: 2,0 | |||
| NT® - Ni 825 | C: 0,01 Cr: 32,0 |
Ni: Rest Mo: 8,0 |
Mn: 2,3 Nb: 0,2 |
Fe: 4,5 | |||
| Brand NT® cobalt basis | Standard analysis of the pure weld metal % | ||||||
| NT® - Co 6 | C: 1,10 Cr: 28,0 |
Co: Rest W: 4,5 |
Si: 1,0 Mn: 0,6 |
Fe: <2,5 | |||
| NT® - Co 6 LC | C: 0,80 Cr: 28,0 |
Co: Rest W: 4,5 |
Si: 1,0 Mn: 0,6 |
Fe: <2,5 | |||
| NT® - Co 21 | C: 0,25 Cr: 27,0 |
Co: Rest Mo: 5,5 |
Si: 0,8 Mn: 0,3 |
Fe: <2,5 | |||
These values are the result of standard analyses on the pure weld metal. Products and data are subject to change for technical reasons. We also produce special-purpose alloys in accordance with your specifications.
| Available dimensions: | 60 x 0,6mm (coil weight: max. 65 kg) 30 x 0,6mm (coil weight: max. 32 kg) |
Solid strip electrodes
NT® Solid strip electrodes
Development Solid strip electrodes
Applications
NiCrFe alloys are corrosion and heat-resistant materials which are employed primarily on components for furnace, reactor, and chemical apparatus construction as well as in the automotive industry.
In the case of NiCr and NiMoCr alloys, applications in chemical plant construction are of special importance because of the high resistance to acids, although components produced with alloys of this group are also employed in automobile construction as well as plant and marine technology.
These welding fillers are supplied primarily as strip and flux-cored electrodes, which are employed for submerged-arc and RES weld surfacing of components for the construction of chemical vessels or reactors.
Nickel
| Designation | Ni (+Co) | C | Cu | Fe | Mg | Mn | S | Si | Ti | |
| NT® Ni99,6 | min. | 99,6 | ||||||||
| max. | 0,08 | 0,15 | 0,25 | 0,15 | 0,35 | 0,005 | 0,15 | 0,10 | ||
| NT® LC-Ni99,6 | min. | 99,6 | ||||||||
| max. | 0,02 | 0,15 | 0,25 | 0,15 | 0,35 | 0,005 | 0,15 | 0,10 | ||
| NT® Ni99,2 | min. | 99,2 | ||||||||
| max. | 0,10 | 0,25 | 0,40 | 0,15 | 0,35 | 0,005 | 0,25 | 0,10 | ||
| NT® LC-Ni99 | min. | 99,6 | ||||||||
| max. | 0,02 | 0,25 | 0,40 | 0,15 | 0,35 | 0,005 | 0,25 | 0,10 | ||
Nickel-chromium alloy
| Designation | Ni (+Co) | Cr | Al | C | Cu | Fe | Mn | Si | Ti | Mo | Nb | |
| NT® Ni 600 (NiCr15Fe) | min. | 72 | 14 | 0,025 | 6 | |||||||
| max. | 17 | 0,3 | 0,1 | 0,5 | 10 | 1,0 | 0,5 | 0,3 | ||||
| NT® Ni 601 (NiCr23Fe) | min. | 58 | 21 | 1,0 | ||||||||
| max. | 63 | 25 | 1,7 | 0,1 | 0,5 | 18 | 1,0 | 0,5 | 0,5 | |||
| NT® INC 625 (NiCr22Mo9Nb) | min. | 58 | 20 | 8 | 3,15 | |||||||
| max. | 23 | 0,4 | 0,1 | 0,5 | 5 | 0,5 | 0,5 | 0,4 | 10 | 4,15 | ||
| NT® NiCr9 | min. | 9 | 0,2 | 0,1 | ||||||||
| max. | Rest | 10 | 0,1 | 0,1 | 0,1 | 0,3 | 0,4 | 0,2 | 0,1 | |||
Further solid strip electrodes are available on request
Flux-cored wires
NT® Flux-cored wires
Flux-cored wire electrodes: “open arc” and submerged arc
Flux-cored wire electrodes: MAG and submerged arc
Flux-cored wire electrodes chemical resistant: MAG joint welding
Flux-cored wire electrodes: copper and copper alloys
Flux-cored wire electrodes
Besides welding of joints, the use of flux-cored wire electrodes for weld surfacing is steadily increasing. The advantages are associated primarily with the manufacture of the wires. For instance, the production of flux-cored wire electrodes with significantly higher contents of alloying elements is simpler than the production of solid wire electrodes with comparable contents. This applies especially to increased carbon contents. Stellite flux-cored wire electrodes, for instance, can be produced with carbon contents up to 2.5 per cent, whereas the manufacture of solid wires with such high carbon contents is not feasible. A further advantage of flux-cored wire electrodes is the possibility of producing them economically on short notice and in small lots. Thus, these wires are also available for research purposes and even for the development of new solid wires.
In addition to alloying elements and deoxidants, flux-cored wires also contain a certain fraction of basic slag components. In combination with basic welding powders, these components ensure a high degree of metallic purity in the resulting weld metal.
In general, the use of flux-cored wire electrodes in MIG welding offers the possibility of combining enhanced efficiency of the process with other technological advantages. Since the melting characteristics differ from those of solid wire electrodes, and since the drops are formed in a special way, the deposition efficiency thus achieved is higher, the resulting process is more economical, and overheating of the weld pool is less severe. Moreover, the natural weaving motion of the arc affects the fusion behaviour of the side walls in such a way that optimal side-wall fusion and thus high quality of the welded joint can be achieved with low energy input.
Seamless flux-cored wires have become established, especially for welding of joints. In contrast to flux-cored wires with a folded cross-section, seamless wires are characterised by a closed mantle, and the inner core is thus protected against moisture during prolonged storage.
Special wires for flame and arc spraying
NT® special wires for flame and arc spraying
| Brand NT® Standard designation |
Material no. EN 14919 Brief symbol |
Wire analysis, % | Applications and properties | |||
| 4302 - Sp | 1 .4302 X6 CrNi 19 9 |
C Cr Ni |
0,06 max. 19,0 9,5 |
Because of their inhomogeneous structure, sprayed claddings applied with this stainless steel wire do not exhibit the same chemical resistance as do steels of the same composition. Claddings of this kind can therefore be designated only as rust- and corrosion-inert. Corresponds to base metal 1.4301; hardness: about 250 HB. | ||
| 4402 - Sp | 1 .4402 X5 CrNiMo 17 122 |
C Cr Ni Mo |
0,06 18,0 12,0 2,5 |
Sprayed rust- and corrosion-inert coatings; corresponding to base metal 1.4401: hardness: about 250 HB | ||
| 4842- Sp | 1.4842 X12 CrNi 25 20 |
C Cr Ni |
0,1 25,0 20,0 |
Heat- and scale-resistant sprayed coating on annealing pots and similar applications; good machining properties; hardness: about 250 HB | ||
| 4370- Sp | 1.4370 X12CrNiMn |
C Cr Ni Mn |
0,1 19,0 8,5 7,0 |
Rust- and corrosion-inert coatings; hardness: about 250 HB | ||
| RMO - Sp | 1886 - Mo | Mo | 99,95 min. | Sprayed molybdenum coating, characterised by especially high wear resistance; machining possible only by grinding; hardness: about 600 HV | ||
| 80/20 - Sp | 2.4869 NiCr 20 | Cr Ni Fe |
20,0 Remainder 1,0 |
As primer for oxide ceramics and for applications at elevated temperatures | ||
| NiAl 80 – 20Sp | Al Ni |
20,0 Remainder |
As primer for oxide ceramics and for applications at elevated temperatures | |||
| NiAl 85 – 15Sp | Al Ni |
15,0 Remainder |
As primer for oxide ceramics and for applications at elevated temperatures | |||
| NiAl 90 – 10Sp | Al Ni |
10,0 Remainder |
As primer for oxide ceramics and for applications at elevated temperatures | |||
| NiAl 95 – 5Sp | Al Ni l |
5,0 Remainder |
As primer for oxide ceramics and for applications at elevated temperatures | |||
| NiMoAl 90-5-5Sp | Ni Mo Al |
Remainder 5,0 5,0 |
Self-adhesive spraying material with high impact resistance | |||
| NiCr 80 – 20Sp | Cr Ni |
20,0 Remainder |
Primer for ceramic claddings, oxidation- and corrosion-resistant at elevated temperatures | |||
| NiCr 40 – 60Sp | Cr Ni |
57,0 Remainder |
High oxidation resistance toward high-temperature corrosion | |||
| NiCrFeSp | Cr Ni Fe |
15,0 Remainder 23,0 |
Self-adhesive sprayed claddings on high-alloy steels | |||
| NiCrMoSp | Cr Ni Mo Nb |
21,0 Remainder 9,0 3,0 |
Similar to alloy 625; very high stability toward sea water; high oxidation and corrosion resistance | |||
| CrCSp | C Cr Ni Mo |
4,3 31,5 Remainder 9,0 |
Wear-resistant alloy with high corrosion resistance | |||
| NiCrBSiSp | C Si Mn Cr Ni Fe B |
0,8 4,2 0,1 14,2 Remainder 4,7 3,0 |
Wear- and corrosion-resistant protective claddings | |||
| SM1260Sp | C Si Cr Ni Fe B |
0,8 4,2 16,5 Remainder 4,0 3,0 |
Wear- and corrosion-resistant protective claddings | |||
| Ni-WSCSp | Ni W Fe B |
Remainder 50 % WSC 50 % WSC 1,2 |
Protection against extreme abrasive attack; corrosion-resistant | |||
| NiCrBSi+WSCSp | C Si Cr Ni W Fe B |
1,1 4,15 13,0 Remainder 15 % WSC 15 % WSC 3,0 |
Protection against severe abrasion; corrosion-resistant | |||
| 35Sp | Si Mn Cr Fe B |
1,85 0,6 28,7 Remainder 3,0 |
Abrasion- and corrosion-resistant, ductile spray coatings with low coefficients of friction | |||
| 42Sp | C Si Mn Cr Ni Mo Fe |
2,0 1,0 1,3 29,5 3,0 0,84 Remainder |
High corrosion resistance, for low-level abrasive attack | |||
| 55Sp | C Si Mn Cr Fe B |
5,0 0,7 0,3 27,0 Remainder 0,5 |
Excellent abrasion resistance; moderate corrosion resistance | |||
| 60Sp | C Si Mn Cr Nb Fe B |
4,6 1,7 0,15 22,8 5,9 Remainder 0,6 |
Very high resistance to mineral abrasion and friction | |||
| 65Sp | C Si Mn Cr Mo Nb V W Fe B |
6,0 1,0 0,4 21,0 6,0 6,7 0,67 1,7 Remainder 0,36 |
Very high wear resistance and elevated-temperature hardness | |||
| CRBSp | C Si Mn Cr Fe B |
0,5 0,8 1,4 31,0 Remainder 2,0 |
High corrosion resistance, for low-level abrasive attack | |||
| 300HCSp | C Si Mn Cr Mo Fe |
1,1 0,8 2,0 2,4 0,25 Remainder |
Hard coatings with high resistance to friction and wear | |||
| 502Sp | C Si Mn Cr Mo Fe B Ti |
4,2 1,44 0,45 20,3 0,28 Remainder 1,3 3,5 |
For fine-grained abrasive attack; moderate corrosion resistance | |||
| 900Sp | Si Mn Cr Ni Mo Fe Co |
0,87 6,0 19,0 8,5 2,0 Remainder 2,0 |
Highly resistant to corrosion and cavitation | |||
| 4001Sp | C Si Mn Cr Fe |
0,1 1,0 1,0 16,0 Remainder |
Hard, corrosion-resistant claddings | |||
| 4122Sp | C Si Mn Cr Mo Fe |
0,39 1,45 0,8 18,0 1,0 Remainder |
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| X40Cr13Sp | C Si Mn Cr Fe |
0,5 0,5 0,6 14,5 Remainder |
Hard, wear-resistant claddings | |||
| NiFeSp | Si Mn Ni Fe |
1,0 3,0 36,0 Remainder |
Very low thermal expansion coefficient | |||
| FeCrAlSp | Cr Fe Al |
22,0 Remainder 6,0 |
Oxidation-resistant at temperatures up to 900 °C; high corrosion resistance | |||
| Fe-WSC | C Si Mn Cr W Fe |
0,5 + + 2,0 50 % WSC 50 % WSC |
High abrasion resistance, provided that corrosive attack is not severe | |||
| CuAl9Fe1Sp | Cu Fe Al |
Remainder 1,0 9,0 |
Dense, wear-resistant alloy with good emergency running properties | |||
| CuAl8Ni6Sp | Mn Ni Cu Fe Al |
1,0 6,0 Remainder 1,8 8,0 |
High erosion resistance | |||
| CuSp | Cu | Remainder | Decoration | |||
Forms available on delivery: NT® flame-spray wires with dimensions 3.17 mm = 1/8’’ and 4.76 mm = 3/16” in coils as specified in EN 14919
NT® arc-spray wires with dimensions 1.6 mm and 2.0 mm in coils R 392
Spraying wires with further quality grades and dimensions available on request.
Solid wires
NT® solid wire electrodes
Wire electrodes for inert-gas welding
Wire electrodes for joining by submerged-arc welding
Wire electrodes for submerged-arc weld surfacing
Solid wire electrodes
Solid wire electrodes are cold-drawn from hot-rolled rods. For ensuring improved sliding on the electrical contacts, more effective electrical conductance, and optimal protection against corrosion, most unalloyed and low-alloy electrodes are plated with a thin layer of copper.
Wire electrodes for joining by submerged-arc welding
Unalloyed and low-alloy wire electrodes can be employed with a large number of structural steel grades, including basic quality grades and special, high-temperature-resistant grades of fine-grained structural steel. These wires are identified by the symbol “S” followed by a number, which is equal to one-half of the average manganese content in per cent, as well as information on further alloy components which characterise the welding filler. Quality grades from 0.5 (S1) to 3.0 per cent (S6) Mn content are standardised.
The Cr content in electrodes for welding of high-temperature-resistant steels ranges from 0.5 to 12 per cent. Molybdenum-alloy electrodes with 1 and 2 per cent Cr are employed most frequently.
Wire electrodes for submerged-arc weld surfacing
Because of the many types of wear encountered in practice, the wire electrodes employed for weld surfacing must withstand the respective surface stresses involved with a variety of different chemical compositions.
For submerged-arc weld surfacing with solid wire electrodes, two approaches are possible: On the one hand, alloyed electrodes can be employed with standard welding powders. On the other hand, unalloyed electrodes can be used with powders which up-alloy the weld metal. Since submerged-arc welding with wire electrodes results in deep penetration with increased dilution, a larger number of passes is necessary for weld surfacing. In order to ensure identical conditions for producing individual structural constituents with different wire electrodes, welding is generally performed at an intermediate-pass temperature. Submerged-arc wire electrodes, that is, their chemical composition, are selected in combination with a suitable welding powder. With due consideration of the appropriate welding data, the prerequisites are thus satisfied for the welding behaviour as well as for the mechanical properties of the weld metal. Basically, fused and agglomerated welding powders are available. Fused powders are characterised by greater homogeneity, low sensitivity to moisture, good storage properties, and high abrasion resistance. An essential advantage of agglomerated powders is the fact that comparatively low temperatures are necessary for their manufacture. Consequently, for instance, these powders can be added for improving the technological properties in welding of temperature-sensitive deoxidation and alloying components.