Chemical components

Product Description

ER90S-B3 is a solid chromium-molybdenum welding wire compliant with AWS A5.28 standards, designed for gas metal arc welding (GMAW/MIG) of 2.25Cr-1Mo chromium-molybdenum steels requiring elevated temperature strength and superior creep resistance. Featuring a composition with 0.07-0.12% carbon, 0.40-0.65% manganese, and 0.30-0.60% silicon, alloyed with 2.00-2.50% chromium and 0.90-1.20% molybdenum, it provides weld metal matching the chemical and mechanical properties of base materials like SA387 Grade 11 and SA387 Grade 22. Compatible with argon-rich shielding gases, it produces weld metal suitable for high-temperature service up to approximately 595°C (1100°F).

Features

▪ Superior Creep Resistance: The 2.25Cr-1Mo alloy composition provides excellent creep and stress rupture resistance at elevated temperatures up to 595°C (1100°F). Essential for power boilers, pressure vessels, and high-temperature piping requiring long-term thermal stability.
▪ Chemical Matching: The precise 2.25% chromium and 1.0% molybdenum content ensures the weld metal chemistry matches base materials like SA387 Gr. 11/22, A387 Gr. 11/22, and similar Cr-Mo steels. Critical for homogeneous properties in high-temperature service.
▪ High-Temperature Strength: Delivers tensile strength of 620-860 MPa, yield strength ≥530 MPa, and elongation ≥17%. The enhanced Cr-Mo combination provides superior strength at elevated temperatures compared to lower-alloy grades.
▪ Hydrogen Service Capability: The controlled alloy composition and low impurity levels provide resistance to high-temperature hydrogen attack, making it suitable for refinery and petrochemical hydrogen service applications.

Applications

▪ Ideal for high-temperature applications requiring weld metal with superior creep resistance and elevated temperature strength, ER90S-B3 is widely used in:
▪ Power Generation: High-pressure boilers, superheaters, reheaters, and main steam piping in fossil fuel and nuclear power plants requiring long-term creep resistance at elevated temperatures.
▪ Petrochemical Processing: Hydrocracking units, catalytic crackers, refinery heaters, and reactors operating at high temperatures in hydrogen service requiring 2.25Cr-1Mo steel welds.
▪ Pressure Vessels: ASME code pressure vessels constructed from SA387 Grade 11 or Grade 22 plates for high-temperature and high-pressure hydrogen service in chemical processing and refining industries.
▪ High-Temperature Piping: Main steam lines, hot reheat piping, and process piping operating at temperatures above 500°C requiring weld metal matching 2.25Cr-1Mo base materials.