ISC
          Plate Flattening

plate-flat-birdsboro.jpg

Roller Flattening

  • Carbon steel 3/8 inch to 3 inches thick
  • High strength and alloy 3/8 inch to 1-1/2 inches
  • Width to 180 inches
  • Length to 1,200 inches
  • Tolerance - half standard A-6 or better 

Press Flattening

  • Carbon to 6 inches thick
  • High strength to 4 inches thick
  • Widths to 150 inches
  • Weights to 40,000 pounds


Leveling Equipment

A "five over four" Birdsboro Roller Leveler; originally installed at the Armco Plate Mill in Houston, Texas, is used for leveling armor plate.

  • 180" wide work roll faces
  • 13" diameter work rolls
  • 16" diameter back-up rolls
  • 6,000 ton total separation force
  • Manual and semi-automatic screw positioning
  • 375/750 HP drive motors (2)
  • 10" x 183" maximum window opening
  • 80 foot long powered roller table north of leveler
  • 110 foot long powered roller table south of leveler
  • Crane capacities: 10 to 40 ton hoist capacities
  • Served by four truck doors and one rail siding

Widths:

  • 48" Minimum
  • 180" Maximum

Lengths:

  • 84" Minimum
  • 1200" Maximum

Inquire:

  • Widths under 48"
  • Lengths under 84"
  • Thicknesses outside published limits with carbon over .30
  • Tolerance tighter than half-standard

Grade
(Specified min vs)
Examples of Grade
Width Range
< 96" Wide
Width Range
> 96" Wide
Tolerance
(ASTM A-6)
Ordinary Carbon
up to 36 KSI
(A-36, Freemax 15, 1018, 1020)
1/2" to 3" Same Half-Standard
HSLA (up to 50 KSI)
A-572 GR 42 & 50,
A-588 GR A & B
1/2" to 2-1/4"
>2-1/4" to 3"
Same Half-Standard
Standard
HSLA (Over 50 KSI) Alloy (up to 100 KSI)
A-572 GR 60 & 65, A-588 GR C & C-QT HY-80
1/2" to 2-1/2" 1/2" TO 2" Standard
Armor Plate (HY-100) MN-MO-B NI-CR-MO & T-1 1/2" to 1-1/2" Same Standard

 

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