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U. S. Steel combines game changing innovation and industry leading product breadth to offer Ultra High-Strength Steel (UHSS) solutions for every challenge and opportunity.
ULTRA HIGH-STRENGTH STEEL
U. S. Steel's Martensitic ultra-high strength steels meet roll-forming applications needs that require extreme flatness with excellent bendability. These grades are ideal for use in crash intrusion protection parts and manufacturing large components where safety of the automotive body structure is critical.
State-of-the-art shape control process
Our Martensitic grades utilize the continuous annealing line (CAL) process that precisely controls heating and cooling operations, resulting high strength and good formability. Precise control of pressure across and through the coil ensures superior flatness that is well within roll forming industry guidelines for tolerances and results in less waste with greater yield. CAL grades are available bare or with an electrogalvanized (EG) coating.
- Front Bumper Beams
- Rear Bumper Beams
- Door Intrusion Beams
- Side Sill Reinforcements
- Roof Rail Reinforcements
- Roof Bow
- Cross Members
- Floor Rails
PRODUCT FORMABILITY AND GUARANTEED PROPERTIES
1100 CAL GRADE
1300 CAL GRADE
1500 CAL GRADE
1700 CAL GRADE
|Tensile Strength (MPa)*||1,100 (min.)||1,300 (min.)||1,500 (min.)||1,700 (min.)|
|Yield Strength (MPa)*||860 – 1,100||1,030 – 1,300||1,200 – 1,500||1,350 – 1,700|
|Total Elongation (%)*||≥ 3||≥ 3||≥ 3||≥ 3|
* Property ranges provided are guaranteed properties at the center of the strip at room temperature.
ULTRA HIGH-STRENGTH STEEL APPLICATIONS
At U. S. Steel, careful listening, creative thinking and cross functional collaboration turn better steel into better solutions for our automaker customers.
Whatever your opportunity or challenge, we have a solution. Browse our product categories below to learn more.
NORTH AMERICAN FLAT-ROLLED