Ultra-High Strength Martensitic Alloy
OwnerPaul M. Novotnyinventor
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Abstract
An age hardenable martensitic steel alloy is disclosed. The alloy has the following composition in weight percent. C 0.30-0.36 Mn 0.05 max. Si 0.05 max. P 0.01 max. S 0.0010 max. Cr 1.30-3.2 Ni 10.0-13.0 Mo 1.0-2.70 Co 13.8-17.4 Ti 0.02 max. Al 0.005 max. Ce 0.030 max. La 0.010 max. The balance is iron and the usual impurities. The composition of this alloy is balanced to provide a unique combination of very high strength, together with good toughness, ductility, and resistance to fatigue.
Claims25
An age hardenable martensitic steel alloy, consisting essentially of, in weight percent, about
- C
- 0.32-0.36
- Mn
- 0.05
- max.
- Si
- 0.05
- max.
- P
- 0.005
- max.
- S
- 0.0010
- max.
- Cr
- 1.30-2.30
- Ni
- 11.5-13.0
- Mo
- 1.8-2.70
- Co
- 15.4-17.4
- Ti
- 0.02
- max.
- Al
- 0.005
- max.
- Ce
- 0.030
- max.
- La
- 0.010
- max.
- the balance being iron and usual impurities.
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An age hardenable martensitic steel alloy, consisting essentially of, in weight percent, about
- C
- 0.32-0.35
- Mn
- 0.05
- max.
- Si
- 0.05
- max.
- P
- 0.005
- max.
- S
- 0.0010
- max.
- Cr
- 2.0-2.3
- Ni
- 11.5-13.0
- Mo
- 1.8-2.2
- Co
- 15.0-16.0
- Ti
- 0.015
- max.
- Al
- 0.003
- max.
- Ce
- 0.020
- max.
- La
- 0.010
- max.
- the balance being iron and usual impurities.
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An age hardenable martensitic steel alloy, consisting essentially of, in weight percent, about
- C
- 0.32-0.34
- Mn
- 0.04
- max.
- Si
- 0.03
- max.
- P
- 0.003
- max.
- S
- 0.0005
- max.
- Cr
- 2.20-2.30
- Ni
- 11.5-12.5
- Mo
- 1.80-1.90
- Co
- 15.4-16.0
- Ti
- 0.01
- max.
- Al
- 0.001
- max.
- Ce
- 0.010
- max.
- La
- 0.005
- max.
- the balance being iron and usual impurities.
An article of manufacture formed from a martensitic steel alloy having a weight percent composition consisting essentially of about
- C
- 0.32-0.36
- Mn
- 0.05
- max.
- Si
- 0.05
- max.
- P
- 0.005
- max.
- S
- 0.0010
- max.
- Cr
- 1.30-2.30
- Ni
- 11.5-13.0
- Mo
- 1.8-2.70
- Co
- 15.4-17.4
- Ti
- 0.02
- max.
- Al
- 0.005
- max.
- Ce
- 0.030
- max.
- La
- 0.010
- max.
- and the balance of said alloy is iron and usual impurities, wherein said article provides a tensile strength of at least about 345 ksi (2344 MPa).
Dependencies are inferred from the claim text.