High strength, high toughness steel welding compositions

Details High strength, high toughness steel welding compositions High strength, high toughness steel welding compositions

1978-04-05

1979-05-01

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75128B, 75128V, 75128W, 228263, C22C 3806, C22C 3844, C22C 3852

Patent

active

041521480

ABSTRACT:
Welding composition for welding a compatible steel having exceptionally high strength and high fracture toughness, which consist essentially of iron containing respective percents by weight of constituents as follows: 0.12-0.20 carbon, 1.8-2.2 chromium, 0.9-1.1 molybdenum, 12.0-14.5 cobalt, 9.0-10.5 nickel and a deoxidizer selected from the class consisting of (a) 0.05-0.20 manganese, (b) 0.010-0.035 aluminum, (c) 0.01-0.20 silicon, (d) a combination selected from among (a), (b), and (c), and (e) a combination selected from among (a), (b), and (c) and 0.02-0.10 vanadium; the composition having a concentration of respective constituents adjusted to have an ultimate tensile strength of 210-250 Ksi (thousands of pounds per square inch), a tensile yield strength of 200-230 Ksi and a Charpy V-Notch absorbed energy of at least 30 foot pounds and produce a weldment having satisfactory strength, toughness, and stress corrosion resistance. Also disclosed are concentration levels below which residuals impurities are maintained for effecting weldments of the requisite high strength, and high fracture toughness.

REFERENCES:
patent: 3502462 (1970-03-01), Dabowski et al.
patent: 4076525 (1978-02-01), Little et al.
Linnert, "Welding Metallurgy," vol. 1, 1965, pp. 381-382.
Linnert, "Welding Metallurgy," vol. 2, 1967, pp. 199-201.

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