ESAB CRYO-SHIELD Ni9 FLUX CORED WIRE OFFERS CRACK RESISTANCE, LOWERS TOTAL COST FOR LNG FUEL, STORAGE TANK APPLICATIONS

September 1, 2020

ESAB Welding & Cutting Products has globally 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 excellent crack resistance and is superior to conventional NiCrMo-3 wires. Mechanical properties are similar to Hastelloy ENiMo-13 flux cored wires but at lower purchase price because of its modified formula. Further, because it uses 100% CO2 shielding gas instead of an argon blend, it lowers operating cost. The wire carries approvals from the ABS, BV, DNV GL, KR, LR and CCS classification societies.


“We developed Cryo-Shield Ni9 in response to ship propulsion systems shifting from heavy fuel oil to LNG fuel to reduce oxide emissions,” says Neil Farrow, Global Product Manager – Cored Wires, ESAB. “This 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 bead crown and slag release compared to conventional 625-alloy wires. In addition, the slag system supports all-position welding, including over-head.”


ESAB offers Cryo-Shield Ni9 in 1.2 mm diameter and packaged on 300 mm wire baskets or plastic spools; vacuum-seal foil packaging prevents moisture absorption. Typical as-welded mechanical properties are a yield strength of 440 MPa, tensile strength of 730 MPa, elongation of 44% and an impact value of 65 J at -196 °C.ESAB Cryo-Shield Ni9 all-position flux cored wire offers excellent crack resist and tolerance to porosity formation when welding 9% Ni steels.


ESAB also offers a full portfolio of filler metal and equipment for LNG applications. Contact your ESAB sales representative to learn more, visit esab.com/fillermetals to view additional product information and success stories.

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