1020 Steel Plate

1020 Steel General Information

1020 plate

According to the four digit alloy numbering system, 1020 Steel is a hot rolled chemistry plate whereby “10” designates a basic plain carbon steel and “20” designates the approximate carbon content.  HR 1020 steel is a general purpose, mild, low-carbon steel with good overall, structural steel properties. Automotive, military and/or nuclear specifications may call for an additional “ASTM A827” or “ASTM A830” specification listed on the 1020 MTR’s, as AISI no longer offers support for the AISI 1020 steel specification.  The ASTM A830 specification covers approximately 48 chemistry only plates, ranging from G10060 – G15520, non-inclusively. Among other mills, ArcelorMittal and Nucor manufacture plates to the ASTM A830 specification.

1020 plate is a chemistry only plate, meeting the chemistry make-up listed below. 1020 steel demonstrates high machinability capacity and offers excellent welding characteristics.  There are no tensile, yield, hardness or other mechanical requirements for the manufacturing of 1020 plate.

Alternative Steel Grades

At times, when we do not hold your size C1020 plate in our inventory, PGI Steel sales representatives may ask you if there is an alternative grade, suitable to substitute for your 1020 request.  A36 steel plate is most often a suitable replacement grade for a 1020 specification.

Common Uses of 1020 Steel Plate

Common uses of 1020: shim plates, gusset plates, bridge plates, bearing plates, robot bases, column base plates, press parallels, press platens, tooling plates, machine plates, machine frames and pedestals, steel table tops, base plates, mold & die, machine mounting plates, etc.

PGI Steel capabilities:

Mill certifications or material test reports (MTR’s) are available upon request. Test reports (MTR’s) include plate specifications, heat numbers, chemical and physical properties listed by the manufacturer or producing mill.  PGI Steel stores an electronic file copy of each MTR, indefinitely.

AISI 1020/ASTM A830 (steel chemical composition table) 
% Carbon (C)0.170 – 0.230
% Iron (Fe)99.08 – 99.53
% Manganese (Mn)0.300 – 0.600
% Phosphorus (P)≤ 0.040
% Sulfur (S)≤ 0.050