AWS Class ENiCrMo3T1-1/T1-4

AWS Class ENiCrMo3T1-1/T1-4 Flux Core Wire – Composition, Properties, and Uses

AWS Class ENiCrMo3T1-1/T1-4 Flux core wire is a nickel-chromium-molybdenum alloy widely used in various industries due to its exceptional properties. The alloy is known for its excellent resistance to high-temperature oxidation, corrosion, and erosion, making it perfect for high-stress applications in harsh environments. This blog post will discuss the composition, physical and mechanical properties, heat treatment, corrosion resistance, and uses of AWS Class ENiCrMo3T1-1/T1-4.

What is AWS Class ENiCrMo3T1-1/T1-4?

AWS Class ENiCrMo3T1-1/T1-4 Flux Core filler Wire is a nickel-chromium-molybdenum (NiCrMo) alloy steel electrode welding high-temperature components in the aerospace, power generation and petrochemical industries. This type of welding electrode provides excellent mechanical properties at elevated temperatures and superior resistance to oxidation, corrosion and wear. The NiCrMo alloy has exceptional strength and toughness even when exposed to extreme temperatures up to 1150°C (2102°F). The T1-1/T1-4 designation refers to the tensile strength range: T 1–100 = 80 ksi minimum, T 1–114 = 100 ksi minimum, while the T 4 indicates “Postweld Heat Treatment is required”. Additionally, a specific level of Nickel gets added on top of chromium & molybdenum for enhanced weldability characteristics.

ENiCrMo3T1-1/T1-4 Flux Core Wire Composition

AWS Class ENiCrMo3T1-1/T1-4 Flux Core Wire is a nickel-chromium-molybdenum alloy that contains 62-67% nickel, 19-23% chromium, 7-9% molybdenum, and small amounts of iron, manganese, silicon, and carbon. The alloy is typically used as welding consumables, including electrodes and wires.

AWS Spec

Weld Metal
Analysis (%)
Carbon (C)

0.10

0.02
Chromium (Cr)

20.0-23.0

21.1
Copper (Cu)

0.50

0.007
Iron (Fe)

1.00*

0.44
Manganese (Mn)

0.50

0.13
Molybdenum (Mo)

8.0-10.0

9.06
Nickel (Ni) 58.0 min 64.7
Phosphorus (P)

0.02

0.004
Silicon (Si)

0.50

0.28
Sulfur (S)

0.015

0.002
Titanium (Ti)

0.40

0.22
Niobium (Nb) + Tantalum (Ta)

3.15-4.15*

3.68

ENiCrMo3T1-1/T1-4 Flux Core Wire Physical Properties

AWS Class ENiCrMo3T1-1/T1-4 has a density of 8.4 g/cm3 and a melting point of 1360-1420℃. The alloy has a coefficient of thermal expansion of 14 µm/m·K at room temperature and a specific heat capacity of 440 J/kg·℃. Furthermore, the alloy has a high thermal conductivity of 17 W/m·K and a low electrical resistivity of 1.23 µΩ·m.

ENiCrMo3T1-1/T1-4 Flux Core Wire Mechanical Properties

AWS Class ENiCrMo3T1-1/T1-4 Flux Core Wire possesses excellent mechanical properties that suit high-stress applications. The yield strength of the alloy ranges from 300-600 MPa, and the ultimate tensile strength ranges from 600-900 MPa. Additionally, the alloy has moderate elongation and reduced area values, making it suitable for use in parts undergoing severe deformation.

Tensile Strength 109,000 psi
Yield Strength 65,000 psi
Elongation (%) 46%

ENiCrMo3T1-1/T1-4 Flux Core Wire Trade Names

Class UNS Oxford Alloys
ENiCrMo3T1-1/T1-4 W86625 Alloy 625T-1

ENiCrMo3T1-1/T1-4 Flux Core Wire Parameters

Diameter Position

Optimum

Amperage Range Voltage Range

Amperage

Voltage

WFS (ipm)

.045”

Flat

190

28

400

125-215

25-29

Out of Position

155

25

320

125-175

24-27

1/16”

Flat

200

27

225

150-230

24-29

Out of Position

175

25

175

150-190

24-26

ENiCrMo3T1-1/T1-4 Flux Core Wire Uses

AWS Class ENiCrMo3T1-1/T1-4 Flux Core Wire is widely used in various industries due to its excellent properties. The alloy is used in the aerospace, automotive, oil and gas, and marine industries. The primary use of the alloy is in the manufacture of welding wire consumables, including electrodes and wires. The alloy’s resistance to high-temperature oxidation and erosion makes it perfect for use in parts that undergo high stress and harsh environments.

ENiCrMo3T1-1/T1-4 Flux Core Wire Heat Treatment

AWS Class ENiCrMo3T1-1/T1-4 Flux Core Wire is a heat-treatable alloy that can be annealed, solution treated, or age-hardened. Annealing the alloy involves heating it to 830-870℃, holding it for 1-4 hours, and cooling it slowly. Solution treatment involves heating the alloy to 1030-1070℃, quenching it in water or oil, and tempering it at 750-870℃. Age-hardening the alloy involves heating it to 760-870℃ for 15-24 hours and then cooling it in water.

ENiCrMo3T1-1/T1-4 Flux Core Wire Corrosion Resistant

AWS Class ENiCrMo3T1-1/T1-4 Flux Core Wire has excellent corrosion resistance, making it suitable for harsh environments. The alloy is resistant to high-temperature oxidation, corrosion, and erosion, including pitting and crevice corrosion. The alloy’s corrosion resistance is due to the presence of chromium and molybdenum, which form a protective oxide layer on the surface of the alloy.

Conclusion

AWS Class ENiCrMo3T1-1/T1-4 is a versatile and reliable alloy with excellent properties, making it perfect for high-stress applications in harsh environments. The alloy’s composition, physical and mechanical properties, uses, heat treatment and corrosion resistance were discussed in this blog post. AWS Class ENiCrMo3T1-1/T1-4 is widely used in various industries, including aerospace, automotive, oil and gas, and marine, due to its exceptional properties. Its resistance to high-temperature oxidation, corrosion, and erosion, among others, makes it one of the most sought-after alloys in the welding alloy consumables market.

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