Classes of Steels for Tubular Products

A method for forming a seamless tubular component comprising:

• (a) supplying a metal alloy comprising Fe at a level of 48.0 to 88.0 atomic percent, Ni at 0.0 to 16.0 atomic percent, Cr at 0.0 to 32.0 atomic percent, Mn at 0.0 to 21.0 atomic percent, B at 1.0 to 8.0 atomic percent, Si at 1.0 to 14.0 atomic percent;
• (b) melting said alloy and solidifying to provide an alloy including a matrix grain size of 500 nm to 20,000 nm and a boride grain size of 25 nm to 500 nm;
• and
• (c) heating said alloy and forming lath structure including grains of 100 nm to 10,000 nm and boride grain size of 100 nm to 2500 nm and said alloy has a yield strength of 300 MPa to 1400 MPa, tensile strength of 350 MPa to 1600 MPa and elongation of 0 to 12%, wherein said alloy having said lath structure is in the form of a seamless tubular component.

A metallic alloy comprising:

• Fe at a level of 48.0 to 88.0 atomic percent;
• Ni at 0.0 to 16.0 atomic percent;
• Cr at 0.0 to 32.0 atomic percent;
• Mn at 0.0 to 21.0 atomic percent;
• B at 1.0 to 8.0 atomic percent;
• Si at 1.0 to 14.0 atomic percent;
• wherein said alloy indicates a matrix grain size of 500 nm to 20,000 nm and a boride grain size of 25 nm to 500 nm and wherein said alloy indicates at least one of the following:
• (a) upon exposure to mechanical stress said alloy indicates a matrix grain size of 500 nm to 20,000 nm, boride grain size of 25 nm to 500 nm, precipitation grain size of 1 nm to 200 nm and a mechanical property profile providing a yield strength of 400 MPa to 1300 MPa, tensile strength of 700 MPa to 1400 MPa and tensile elongation of 10 to 70%;
• or
• (b) upon exposure to heat followed by mechanical stress, said alloy indicates a refined grain size of 100 nm to 2000 nm, boride grain size of 200 nm to 2500 nm, precipitation grains of 1 nm to 200 nm, wherein said alloy indicates a yield strength of 400 MPa to 1700 MPa, tensile strength of 800 MPa to 1800 MPa and an elongation of 5% to 65%.

A metallic alloy comprising:

• Fe at a level of 48.0 to 88.0 atomic percent;
• Ni at 0.0 to 16.0 atomic percent;
• Cr at 0.0 to 32.0 atomic percent;
• Mn at 0.0 to 21.0 atomic percent;
• B at 1.0 to 8.0 atomic percent;
• Si at 1.0 to 14.0 atomic percent;
• wherein said alloy indicates a matrix grain size of 500 nm to 20,000 nm and boride grain size of 100 nm to 2500 nm wherein said alloy:
• (a) upon a first exposure to heat forms a lath structure including grains of 100 nm to 10,000 nm and boride grain size of 100 nm to 2500 nm and said alloy has a yield strength of 300 MPa to 1400 MPa, tensile strength of 350 MPa to 1600 MPa and elongation of 0 to 12%;
• and
• (b) upon a second exposure to heat followed by stress said alloy has lamellae grains of 100 nm to 5000 nm, boride grains of 100 nm to 2500 nm, precipitation grains of 1 nm to 100 nm and said alloy has a yield strength of 300 MPa to 1400 MPa, a tensile strength of 350 MPa to 1600 MPa and elongation of 0 to 12%.