ESAB Welding & Cutting Products has introduced Cryo-Shield Ni9, a Ni Cr Mo alloy flux cored wire used for all-position welding of 9% Ni steel LNG fuel and storage tanks with 100% CO2 shielding gas.
This modified 625-type wire offers crack resistance and is superior to conventional NiCrMo-3 wires. Mechanical properties are similar to Hastelloy ENiMo-13 flux cored wires but at a lower price due to its modified formula.
“We developed Cryo-Shield Ni9 in response to ship propulsion systems shifting from heavy fuel oil to LNG fuel to reduce oxide emissions,” said Neil Farrow, Global Product Manager of Cored Wires at ESAB.
“The wire also meets the needs of LNG storage tank fabricators and other 9% Ni steel applications. In benchmark tests against leading 625-alloy wires, Cryo-Shield Ni9 provided superior crack-resistance tolerance, which is especially critical for root welding.”
“Customer field tests with 100% CO2 shielding gas also confirmed better tolerance to porosity formation wet-out for a flatter bread crown and slag release compared to conventional 625-alloy wires.”
ESAB offers Cryo-Shield Ni9 in 1.2mm diameter and packaged on 300mm wire baskets or plastic spool; vacuum-seal foil packaging prevents moisture absorption.