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North America's Premier Steel Plate Company
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Processing Services

Adding value is what we do best at Churchill Steel Plate. From simple to complex multi-step requirements, our expert staff is here to provide solutions and a quality product.

Flame Cutting

From simple shapes to the most complex drawings, allow our expert programmers and operators to tackle your flame cut requirements.

Capabilities

  • •   6 cnc controlled multi-torch oxy-fuel machines

  • •   Multi-view processing capabilities

  • •   360 degree beveling capability available

  • •   Capacity up to 24" thick

  • •   Table capacity of 120" x 480"

  • *We recommend pre-heat for high carbon & alloy grades over 5" thick

  • *We recommend thermal treating high carbon & alloy grades post process for crack prevention








Flame Tolerances

THICKNESS TOLERANCE (+/-) OVERALL SQ. W/IN
0.25" - 1.00" 0.0625 - 0.0625 0.125 0.0313
1.125" - 2.50" 0.0125 - 0.0125 0.125 0.0625
2.75" - 7.125" 0.1875 - 0.125 0.250 0.1250
7.25" - 10.00" 0.2500 - 0.1875 0.250 0.1875
10.125" - 13.00" 0.3125 - 0.2500 0.375 0.1875
14.00" - 18.00" 0.5000 - 0.3750 0.500 0.3125
20.00" - 24.00" 0.5000 - 0.5000 0.750 0.3750
Plasma Cutting

400 AMP High definition plasma cutting provides improved surface quality, achievement of tighter tolerances to your near net shape, and higher speed processing.

  • •   CNC controlled multi-head hi-definition plasma

  • •   Capacity up to 2" thick

  • •   Table capacity of 120" x 720"



Saw Cutting

Saw cutting is available upon request and provides the advantage of no heat affected zone and a square edge.

  • •   Up to 30" thick
Grinding

Milling, blanchard, and surface grinding is available upon request. allow us to save you a first step operation or provide a near finished part.

  • •   Blanchard grinding 165" corner to corner capacity

  • •   Milling capacity 60"H x 106"W x 312"L

  • •   Surface grinding capacity 40" x 84" x 200"


Thermal Treatment

Annealing requires furnace temperature of 1550 degrees F for a minimum of one hour per inch of mass. Annealing softens the heat affected zone by changing the microstructure for improved machinability and cold forming. Annealing is recommended for steels with .40+ carbon content.

Stress relieving requires furnace temperature of 1150 degrees F. Stress relieving is used for lower carbon steels to reduce internal stresses that could build during mechanical processes or the flamecutting itself.

Normalizing requires furnace temperature of 1600 degrees F minimum. normalizing is used to refine grain structure beyond the uniformity which annealing can achieve. It is similar to annealing in that it softens the heat affected zone. However, because normalizing uses ambient air to cool the steel, the result is typically a harder steel than with annealing.

Quench and temper methods allow for hardening of steel.

Recommended hardness ranges by grade for q&t

  • •   1045: 270 bhn, preferred range is 220/260 bhn

  • •   4140: 364 bhn, preferred range is 269/321 bhn

  • •   4340: 477 bhn, preferred range is 388/433 bhn

  • •   **4140/4142, and 4340 are through hardening steels



Testing Services

Non Destructive Testing

UT testing

•     astm a435: most general specification. Looks to identify delaminations and gross porosity

•     astm a578: more specific examination. Looks to identify porosity as small as 1/4" to 3/8"

•     We offer astm a578 level a, b, and c in-house. 3.1 is a 100% scan

Magnetic particle testing: Available upon request

Liquid die penetrant testing: Available upon request


Mechanical Testing

Physical property testing

•     Charpy v-notch testing: determines material "toughness" during impact fracture

•     *Recommended test sample 4" x 8"

•     Tensile/yield/elongation/reducation of area

•     *Recommended test sample 4" x 6" under 10" thick, 4" x 8" over 10" thick

Delivery

We quote delivered prices to all locations in North America.

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