SOLUTIONS
Oil & Gas Pipeline Project
Subject :How to select welding material for the valve body of oil/gas extraction equipment
Component parts
The working environment of valves in oil and gas fields contains a large amount of corrosive media such as H2S, CO2, and high chloride. Need to weld a layer of nickel based alloy on the surface of the low-alloy valve body and valve cover
Basemet of componet parts
The base material is AISI31408630MODIFIEL, or 2.25Cr1Mo, generally a cast structure
Reference for the use of our welding products
TIG/MIG Nickel Alloy Welding Wires:AWS ERNiCrMo-3 C625
Why choose our AWS ERNiCrMo-3 forthe valve body of oil/gas extraction equipment
MIG welding wire
The content of iron in the ER625 weld overlay should be controlled within the range of 5%, and the thickness of the weld overlay after machining should not be less than 3.17mm. The dilution rate of the weld seam should be controlled at 5-10%.
AWS A5.14 AWS ERNiCrMo-3 Description
ERNiCrMo-3 is a nickel-chromium-molybdenum-niobium alloy welding wire that conforms to international standards such as AWS A5.14, corresponding to the Chinese grade SNi6625. It exhibits excellent high-temperature and corrosion-resistant properties, with an operating temperature range of -185°C to 1093°C. It demonstrates strong oxidation resistance at high temperatures and can withstand pitting and crevice corrosion caused by media such as hydrochloric acid, sulfuric acid, and chlorides. Its mechanical properties are stable, with a tensile strength of 760-790 MPa and an elongation of 27%-35%. During welding, it forms a stable weld seam, enabling reliable connection of nickel-based alloys and dissimilar metals, as well as corrosion-resistant overlay welding on base materials.
AWS A5.14 AWS ERNiCrMo-3 Application
ERNiCrMo-3 (Alloy 625) is a nickel-based welding wire specifically designed for extreme service conditions, conforming to the AWS A5.14 standard. Its core applications include petrochemical engineering (welding and cladding of hydrogenation reactors and acidic equipment), marine engineering (offshore platforms and seawater desalination facilities), nuclear power (nuclear reactor components), and aerospace (high-temperature turbine components). It is also suitable for dissimilar metal welding in LNG storage tanks. Characterized by excellent resistance to high and low temperatures and strong corrosion, it can reliably join nickel-based alloys with dissimilar metals, ensuring stable operation of equipment under stringent conditions.
AWS A5.14 AWS ERNiCrMo-3 Chemisty Analysis
Chemistry Compostion
| NI | Cr | Mo | Fe | Co | C | Mn | Si | S | P |
| BAL | 20.0%-23.0% | 8.0%-10.0% | ≤5.0% | ≤1.0% | ≤0.10% | ≤0.5% | ≤0.5% | ≤0.015% | ≤0.015% |
AWS A5.14 AWS ERNiCrMo-3 Feature
High temperature performance: Excellent oxidation resistance below 1000 ℃, suitable for high-temperature components with frequent thermal cycles (such as petrochemical cracking furnace tubes)
Corrosion resistance: It has good resistance to oxidizing acids such as nitric acid, phosphoric acid, and caustic alkali solutions
Welding processability: stable arc, beautiful weld formation, excellent slag removal, and good thermal cracking resistance
AWS A5.14 AWS ERNiCrMo-3 Supply & Standard
| MIG SIZE | 0.8mm | 1.0mm | 1.2mm | 1.6mm | ||
| MIG SPOOL | 5KG/12.5KG/15KG D300 D300 D300 |
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| TIG ROD | 1.2mm | 1.6mm | 2.0mm | 2.4mm | 3.2mm | 4.0mm |
| TIG TUBE | 5KG | 5kg | 5kg | 5KG | 5kg | 5kg |
| Coil Rods | 5.5mm | |||||
| Coil Packing | 300kgs | |||||
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