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Advantages
The combination of the higher yield strength, weathering properties and reduced preheat requirements can result in significant cost savings - both short and long term - for bridge owners.
For bridge replacements, HPS-70W's higher strength level should result in lighter superstructures and the use of shallower girders that may permit bridge designers to reuse the existing substructure elements.
Current Availability
Lengths to 50 ft. (15.2 m), widths to 174 in. (4.42 m) - inquire for plate widths up to 195 in. (4.95 m) - and thicknesses to 4 in. (102 mm) - based on quenched and tempered material from Bethlehem Lukens Plate (BLP) facilities at Burns Harbor, Ind., Coatesville, Pa. or Conshohocken, Pa.
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Tensile Requirements
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Yield strength (minimum)
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70 Ksi (485 MPa)
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Tensile strength *
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90-110 Ksi (620-760 MPa)
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Elongation in 2" (50 mm) minimum
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19%
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Chemical Composition Requirements *
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Carbon (C)
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0.11% Max.
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Manganese (Mn)
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1.15/1.30%
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Phosphorus (P)
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0.020% Max.
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Sulfur (S) **
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0.006% Max.
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Silicon (Si)
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0.35/0.45%
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Copper (Cu)
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0.28/0.38%
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Nickel (Ni)
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0.28/0.38%
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Chromium (Cr)
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0.50/0.60%
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Molybdenum (Mo)
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0.04/0.08%
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Vanadium (V)
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0.05/0.07%
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Aluminum (Al)
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0.010/0.040%
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Nitrogen (N)
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0.015% Max.
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* Expanded ranges are being considered
** All HPS-70W is calcium treated for sulfide shape control
Charpy V-Notch Impact Toughness Requirements
(FCM - Fracture Critical Member)
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Non FCM
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25 ft-lbs. Min. @ -10�F (34J@ -23�C) (all Zones)
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FCM
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35 ft-lbs. Min. @ -10�F (48J@ -23�C) (all Zones)
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