WELDING OF NICKEL-CHROMIUM-IRON ALLOY FOR NUCLEAR-POWER STATIONS

Journal Article · Tue Nov 01 04:00:00 EST 1960 · Welding J. (N.Y.)

OSTI ID:4132253

Witherell, C E

The resistance oi the 15% chromium, 7% iron, nickel alloy to stress- corrosion cracking stimulated the nuclea;power field to consider extensive use of this alloy for components of- nuclear-power stations. The fabrication for this service demands an exceptionally high level of weld integrity, and added to this is the necessity for joining and overlaying unusually thick sections. The shortcomings of existing welding prcducts in meeting the rigid standards set for these applications required the development of a completely new nickel-chromium- iron alloy welding electrode and inert-gas filler wire specifically engineered for nuclear-power-plant fabrication. The covered electrode, designated as MIL Type 4N85, prcduced crack-free and porosity-free welds in all positions, even under severely restrained conditions. The increased tolerance of the weld metal for dilution by iron makes this electrode particularly well suited for welding nickel-chromium-iron alloy to carbon or stainless steel and for overlaying steel. The filler wire designated as MIL Type EN87/RN87, intended for welding by the inent-gas-shielded processes, produced nickel-chromium-iron alloy welds and overlays to the same quality level as the 4N85 covered electrcde. The welds deposited by these new materials had good mechanical prop erties and were not adversely affected by normal stressrelieving heat treatments used for steels. (auth)

• Research Organization: International Nickel Co., Inc., Bayonne, N.J.
• NSA Number: NSA-15-001819
• OSTI ID: 4132253
• Journal Information: Welding J. (N.Y.), Journal Name: Welding J. (N.Y.) Vol. Vol: 39
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATMOSPHERE
CHROMIUM ALLOYS
CRACKS
ELECTRODES
FABRICATION
HEAT TREATMENTS
INERT GASES
IRON ALLOYS
MECHANICAL STRUCTURES
METALS, CERAMICS, AND OTHER MATERIALS
NICKEL ALLOYS
STEELS
STRESSES
THICKNESS
WELDING