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
- 7 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 practice:
- Pre-heating of carbon and alloy grades and post flame/plasma cutting thermal treatments for improved machinability and prevention of stress cracking.
Flame Cutting Tolerances
THICKNESS
TOLERANCE(+/-)
OVERALL
SQ. W/IN
0.25″ – 1.00″
1.125″ – 2.50″
2.75″ – 7.125″
7.25″ – 10.00″
10.125″ – 13.00″
14.00″ – 18.00″
20.00″ – 24.00″
0.0625
0.125
0.1875 – 0.125
0.2500 – 0.1875
0.3125 – 0.2500
0.5000 – 0.3750
0.5000 – 0.5000
0.125
0.125
0.250
0.250
0.375
0.500
0.750
0.0313
0.0625
0.1250
0.1875
0.1875
0.3125
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.
- 2 CNC-controlled 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 flame cutting 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:
Please note that on very large parts the higher range of the hardness may not be achieved.
- 1045: 270 BHN max. Preferred range is 220/260 BHN
- 4140: 364 BHN max. Preferred range is 269/321 BHN
- 4340: 477 BHN max. Preferred range is 388/433 BHN
**4140/4142, and 4340 are through-hardening steels
FULL ANNEAL
This process is similar to the anneal cycle but has a defined time period for the ramp up to 1550° and a defined ramp down time period for the cooling.
Testing Services
Non Destructive Testing (In House)
UT testing
We have two certified Level II and multiple Level I examiners as full time employees.
ASTM A435: most general specification. Looks to identify delaminations and gross porosity
ASTM A578: more specific examination. Designed to identify more specific voids in the metal.
We offer ASTM A578 level A, B, and C in-house. S 1.1 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
