Grade C and Grade D plate for drawing-defined structural and formed parts
We supply ASTM A283 Grade C and Grade D plate as rectangles or drawing-defined blanks. The grade suffix stays on each material line because the two grades have different strength and elongation requirements. Our structural catalog covers medium and thick plate; the offer pairs the selected grade and thickness with the parent-plate size, delivery condition and any cutting or forming work.
| Specification | ASTM A283/A283M with Grade C or Grade D stated |
|---|---|
| Dimensions | Thickness × width × length, plus piece count |
| Material route | Discrete plate or permitted coil-derived finished plate |
| Condition | Required delivered condition identified on the material line |
| Preparation | Rectangular cutting, drawing profiles or separately priced forming |
| Finished part | Drawing revision, bend direction and acceptance stage where applicable |
Compare the two grades on the same published reference basis before selecting the material for a formed or structural part.
| Reference grade | Minimum yield (ksi) | Tensile range (ksi) | Minimum elongation in 2 in. (%) | Minimum elongation in 8 in. (%) |
|---|---|---|---|---|
| A283 Grade C | 30 | 55–75 | 25 | 22 |
| A283 Grade D | 33 | 60–80 | 23 | 20 |
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SSAB Grade C/D transverse-tensile reference data for 0.100–2.000 in. plate. Elongation minima decrease by two percentage points for plate wider than 24 in.; additional ASTM A6 adjustments can apply. This reference scope is separate from the 4–115 mm catalog program. The ordered thickness, unit system, governing specification and supplied material report establish delivered acceptance.
The material record identifies the ordered grade and its complete chemistry, yield, tensile and elongation results. These criteria distinguish Grade C from Grade D where one measured tensile result falls within both ranges.
A283/A283M treats inch-pound and SI systems independently. The specified unit basis and grade stay together on the order, using the governing values and tolerances for that system.
Permitted coil-derived A283 plate receives the required finished-product processing, inspection, testing and reporting. Applicable additional ASTM A6 requirements are included in that route’s material acceptance.
The reference Grade C elongation is higher than Grade D on the same gauge-length basis. A formed-piece review combines that material choice with thickness, rolling direction, edge condition and the proposed inside radius.
A formed-part drawing identifies the bend line relative to the plate rolling direction when required. The cut layout preserves that orientation instead of rotating a blank solely to improve nesting yield.
A flat-blank order identifies the delivered cut shape. When bending is included, the offer states the finished angle, inside radius, leg dimensions and acceptance stage. Finished legs, radius and bend allowance determine the required starting blank length.
Mill scale, cut edges and formed corners have different surface conditions. Requested blast preparation or coating identifies the faces and treatment stage, including the condition required after bending.
A drawing can combine a relatively simple structural material requirement with important bend and fit dimensions. The material suffix and finished outline remain visible when several thicknesses or shapes share one assembly schedule.
A283 C/D parts, A36 connection plates and pressure-purpose plate have separate material lines. Each group retains its own grade, condition and preparation scope within a mixed fabrication schedule.
Compare all structural and pressure-purpose plate programs
The material review connects the ordered grade with its chemistry and mechanical results. Yield, tensile range and elongation are checked on their stated test bases for the selected C or D material.
The two elongation columns refer to different gauge lengths. In the cited producer reference, a plate wider than 24 in. uses a two-percentage-point reduction; the report is read against the applicable specimen and specification conditions.
For accepted bending work, the angle, radius and final legs are checked against the formed-piece drawing. Any required surface or bend examination is identified separately from the original plate material test.
Our quotation identifies Grade C or D, supplied dimensions and piece quantity. Cutting, bending and required inspection have separate scope, allowing flat rectangles and finished formed parts to be compared by their actual supplied work.
A nested blank order identifies the purchased material and resulting piece counts. Rolling-direction restrictions or a wider blank can change the usable layout; the quoted mass basis states whether it refers to parent material, net blanks or weighed steel.
Flat plates travel in supported thickness groups. Formed components need supports that protect their legs and corners; their packing count remains separate from unformed blanks and scrap allowances.
Yes. The current specification covers Grades C and D. Each order line states the selected suffix so its material acceptance follows the intended grade.
A proposed alternative is identified as a separate material offer for acceptance against the complete purchase specification. Grade C and D retain their different yield, tensile-range and elongation requirements.
The 25% value belongs to the stated tensile-test gauge length and reference conditions. Forming review also uses thickness, rolling direction, edge quality, inside radius and the accepted bend detail.
For plate wider than 24 in., the cited SSAB reference reduces the elongation requirement by two percentage points. Its Grade C entries become 23% in 2 in. and 20% in 8 in.; Grade D becomes 21% and 18%. Additional applicable ASTM A6 adjustments must also be considered.
The finished plate needs its required processing, inspection, testing and reporting, including applicable additional ASTM A6 requirements. The record set links the starting material to that completed plate qualification.
Yes. Each drawing and grade has its own piece count. The flat blank dimensions, bend preparation and final formed dimensions are quoted as their actual supplied stages, with packing arranged for each shape.
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Send the A283 grade, unit basis, thickness, dimensions and piece counts. Include the required condition and drawings for cut or bent parts, with rolling-direction requirements and destination. We return the material and accepted preparation scope as separate items.