Alloy Plate
Churchill Steel Plate offers one of the nation’s largest selections of alloy plate, in stock and ready for cutting/shipping.
With thicknesses of up to 14 inches, you’ll find the stock you need. That means savings on shipping costs, heat treating, grinding, milling and machine time.
4140/ASTM A829
General Description
Economical alloy steel which develops high hardness and strength after heat treatment.
Chemical Requirements
ELEMENT
Through 14″
ELEMENT
Through 14″
Carbon
Manganese
Phosphorus
Sulfur
0.36/0.44
0.75/1.00
0.035
0.040
Silicon
Chromium
Molybdenum
0.15/0.35
0.80/1.10
0.15/0.25
Chemical Requirements
ELEMENT
Through
8 1/8″
ELEMENT
Through
8 1/8″
Carbon
Manganese
Phosphorus
Sulfur
0.38/0.43
0.65/0.85
0.025
0.025
Silicon
Chromium
Nickel
Molybdenum
0.15/0.35
0.70/0.90
1.65/2.00
0.20/0.30
4340/ASTM A829
General Description
A Cr-Ni-Mo steel with high tensile strength and can endure most high heat applications.
8620
General Description
An alloy carburizing steel when thermally treated develops a hard outer case with a soft ductile core.
Chemical Requirements
ELEMENT
Through 5″
ELEMENT
Through 5″
Carbon
Manganese
Phosphorus
Sulfur
0.18/0.23
0.70/0.90
0.035
0.04
Silicon
Chromium
Nickel
Molybdenum
0.15/0.35
0.40/0.60
0.40/0.70
0.15/0.25
