A36 Steel Plate Suppliers
139 vetted U.S. suppliers · 36 states
A36 plate is the universal carbon-steel grade for structural brackets, base plates, weldments, and general-fab work — the highest-volume hot-rolled plate spec in U.S. fabrication. Below is our live count of vetted U.S. suppliers with state distribution and a one-click RFQ flow.
Geographic distribution
Where these suppliers are
Top 8 states by vetted-supplier density. 64 more across 28 additional states — listed below the chart.
Also covered
Connecticut (5) · Pennsylvania (5) · Indiana (5) · Arizona (4) · Georgia (4) · Alabama (3) · Massachusetts (3) · Missouri (3) · Oklahoma (3) · Utah (2) · Oregon (2) · Maryland (2) · Washington (2) · North Dakota (2) · Virginia (2) · Wisconsin (2) · Kansas (2) · New Jersey (2) · Louisiana (2) · Minnesota (1) · Tennessee (1) · Wyoming (1) · New Mexico (1) · Kentucky (1) · South Carolina (1) · Idaho (1) · Alaska (1) · Iowa (1)
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What A36 steel plate is
A36 (ASTM A36) is the most widely-used carbon steel structural plate spec — minimum 36 ksi yield, weldable, formable, and inexpensive. Plate is supplied hot-rolled with mill-scale finish in thicknesses from 0.1875" through 4" and beyond. Common downstream uses: structural brackets, base plates for column anchors, weldment components, frame fabrication, equipment skids, ground plates for electrical work, and general machine-fab.
What to look for in a supplier
A36 is a commodity plate spec — every steel service center carries it. Differentiators: cut capability (saw-cut, plasma-cut, water-jet, laser), surface condition (mill-finish hot-rolled is standard; descaled, primed, or pickled-and-oiled add cost but reduce downstream blast/paint labor), and flatness. For brake-formed work, ask about thickness tolerance — mill standard is loose but precision-leveled plate is available. Most stockists carry up through 4" plate in standard widths (96" and 120"); thicker plate above 6" often runs mill-order.
FAQ
Common questions
What's the difference between A36 and 1018?
A36 is a structural spec (minimum properties, more permissive chemistry); 1018 is a cold-rolled chemistry spec (controlled carbon, used where machinability matters). Plate is almost always A36; bar can be either depending on use. They're not interchangeable for spec-driven work but mechanically very similar.
Is A36 plate weldable?
Yes — A36 is one of the most weldable structural steels. Standard welding consumables (E70-series rod, ER70S-2/3/6 wire) work with no pre-heat required for plate up to ~1.5" at room temperature. Thicker plate or cold-weather welding may need pre-heat per AWS D1.1.
Why is A36 plate cheaper than 1018?
A36 is a structural spec that allows wider chemistry latitude and looser surface tolerance — mills can run it efficiently. 1018 has tighter chemistry and surface controls. For general structural use, A36's wider tolerance is fine and the cost savings are real.
What thicknesses does A36 plate come in?
Standard stocked: 0.1875", 0.25", 0.3125", 0.375", 0.5", 0.625", 0.75", 1", 1.25", 1.5", 2", 3", and 4". Above 4" and unusual intermediate thicknesses run mill-order in most regions.
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