Apr 28, 2014 · My task is to qualify our pipe welders and certify a procedure to join 316 stainless steel (SCH40) pipe to Inconel 625 and to Inconel 718. The pipe will experience temperatures as high as 1150 deg F and a working pressure of approx. 400 psi.
Alloy 625 304L S.S. Gos Tungsten Arc Weld Electron Beom Weld Electron Beam d Fig. 3 Description of the modified test specimen used in this experiment. Note the use of explosively bonded clad metal which was electron beam welded to stainless steel tabs. The GTA spot weld was made with the Alloy 625 facing the welding electrode as How to weld Duplex Stainless Steel - Rolled Alloys, Inc.625 alloy is high creep-rupture strength, oxidation resistant to 1800°F (982°C). Alloy 718 (AMS 5663) is bar that is already aged (precipitation hardened). As supplied, this material provides high tensile strength and hardness compared to 718 in the annealed condition. Because welding duplex stainless steel is not fool-proof it is
Inconel 625 to 316L filler material? by Bruce (France) Am welding some Inconel 625 to 316L stainless, have been spec'd alloy 59 but can't get any where i am. Can you suggest a replacement?-----In the aerospace industry, I have very often seen inconel 625 filler metal called out for that combination. Inconel 625:Properties, Applications and Production Inconel 625 is a high-performance nickel-chromium-molybdenum alloy known for its high level of strength, temperature resistance, and corrosion resistance. This superalloy is composed mainly of nickel (58% min.) followed by chromium, and molybdenum, niobium, iron, tantalum, cobalt, and trace amounts of manganese, silicon, aluminium, and titanium. Inconel 625 also commonly
Meanwhile, molybdenum protects the material against pitting corrosion. In 15% sulfuric acid, the material corrodes at a minimal rate of 0.188 mm per year. High level of fabricability. Inconel 625 was designed to have better weldability than earlier alloys, with no signs of cracking when exposed to strain and temperature changes post-welding. Nickel Alloy Electrodes - ESAB Welding & CuttingNi-based CrMoNb electrode for welding of Ni-alloys of the same or similar type as e.g. Inconel 625, for welding of 5% and 9% Ni steel. The electrode is very suitable for welding of 254 SMO, i.e. UNS S31254 steel.
stainless steel is generally helpful in welding. Less welding heat is required to make a weld because the heat is not conducted away from a joint as rapidly as in carbon steel. In resistance welding, lower current can be used because resistivity is higher. Stainless steels which require special welding procedures are discussed in later sections The Welding of Inconel 600 MaterialsWelding Characteristics of Inconel 600. Generally, preheating is not required for Inconel 600 welding. However, when the base metal temperature is lower than 15°C, the joint area of two sides with a length of 250 mm ~ 300 mm shall be preheated to 15°C ~ 20°C to avoid blow holes resulting from moisture condensing.
Clad steel with NiCrFe weld metal and join steel and stainless steel to nickel base alloys. 617:ERNiCrCoMo-1:N/A:Weld NiCrCoMo base material and join various dissimilar high-temperature alloys. 625:ERNiCrMo-3:EN/RN625:Useful for various dissimilar joints involving nickel alloys, carbon steel, low alloy and stainless steels. Weld Moldmild & low alloy steel weld materials; stainless steel weld materials; tool & die alloy welding materials; forging weld materials; hardfacing weld materials; special maintenance products; typical welding parameters; filler material selection guide; 802, 625 :
A common solution is to fabricate the vessel with a high strength, low alloy steel, and weld clad the container, with various higher alloy materials, utilizing various processes. Common processes used can be MIG, TIG, SMAW, and SAW using bare wire or wire and flux combinations. Welding of Nickel Alloys - Part 1 - TWIAddition of hydrogen to the shield gas (up to 10%H in argon) in TIG welding also has been found to be beneficial in reducing the weld pool surface tension. A further characteristic of nickel alloys is that the amount of penetration is less than with a carbon or stainless steel. Increasing the welding current will not increase penetration.
Alloy 625 has been a popular choice, the weld tensile strength matching or exceeding that of the parent metal. There are limitations to this approach, and caution needs to be exercised when selecting a suitable filler. For example, Alloy 625 has been extensively used for welding dissimilar joints in austenitic and duplex steels. Welding of Nickel Alloys - Part 2 - TWIAlloy 625 has been a popular choice, the weld tensile strength matching or exceeding that of the parent metal. There are limitations to this approach, and caution needs to be exercised when selecting a suitable filler. For example, Alloy 625 has been extensively used for welding dissimilar joints in austenitic and duplex steels.
//// Alloy 625 can be readily welded by conventional processes used for austenitic stainless steel, including fusion and resistance methods. The material should be in the mill annealed condition and thoroughly descaled and cleaned before welding. Preheating is not required and pos-weld