Weldable steel of high strength and high toughness, and...

Details Weldable steel of high strength and high toughness, and... Weldable steel of high strength and high toughness, and...

2011-07-12

2011-07-12

Wyszomierski, George (Department: 1733)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S654000

Reexamination Certificate

active

07976651

ABSTRACT:
Disclosed are a weldable steel of high strength and high toughness and a method of producing members of machine parts. The steel consists essentially of, by weight %, C: 0.10-0.16%, Si: 0.05-0.50%, Mn: 1.3-2.3%, Cu: up to 0.5%, Ni: up to 0.5%, Cr: up to 0.5%, Mo: up to 0.3% and Ti: 0.025-0.035%, and the balance of Fe and inevitable impurities, and satisfying the condition that the weld-cracking susceptibility, Pcm, defined by the formula 1A below is less than 0.35, and the condition that the manganese equivalent, Mneq, defined by the formula 2A below is larger than 2.0.in-line-formulae description="In-line Formulae" end="lead"?Pcm=C(%)+Si(%)/30+Mn(%)/20+Ni(%)/60+Cr(%)/20+Mo(%)/15+Cu(%)/20  1Ain-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Mneq=Mn(%)+Cu(%)+Ni(%)/2+Cr(%)+Mo(%)  2Ain-line-formulae description="In-line Formulae" end="tail"?

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H. Paxton, “Steel,” Oct. 15, 2004, Kirk-Othmer Encyclopedia of Chemical Technology, John Wiley & Sons, Inc., p. 1-79.
Office Action issued by the U.S. Patent Office on Feb. 17, 2009 in connection with parent U.S. Appl. No. 11/526,651.
Office Action issued by the U.S. Patent Office on Dec. 9, 2009 in connection with parent U.S. Appl. No. 11/526,651.
Full English Translation of JP-A-2000-303147, Inventor: Koji Nakamura, Published Oct. 31, 2000, 32 pages total.

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