ASTM A283 Grade D|A283GR.D Steel Plate supplier

Start the quotation review with four Grade D decisions

ASTM A283 Grade D is carbon steel plate of structural quality for general application. The A283/A283M-24 public Scope 1.1 names two grades, C and D, on an A6/A6M structural-material basis. A Grade D purchase should retain that precise identity from the drawing through the quotation and material records. A general “carbon plate” description does not settle the grade or its acceptance requirements.

For Gangsteel to review an enquiry, identify the governing edition and unit system alongside the plate schedule. Then make any options explicit, especially copper-bearing steel, additional testing and delivered condition. This keeps optional inspection and chemistry conditions visible when offers are compared. The following checklist separates specification context from decisions that belong in the purchase documents.

Use Grade D strength with a complete tension-test description

The mechanical references are restated by SSAB’s Grade D datasheet dated 6 June 2019 and cross-checked with Ferrobend and American Alloy Steel compilations. They are a mill restatement plus public compilations, not an official current-edition mechanical-table extract. The stress pairings and elongation gauges should remain attached to the property names when an offer or report is reviewed.

SSAB identifies transverse testing in its mill reference and a two-percentage-point elongation reduction for plate wider than 24 in., with further A6 adjustments where applicable. That is the cited producer’s restatement, not a claim to have inspected the official clause. Confirm the specimen, width adjustment and ordered-edition basis before deciding which limit applies to a reported result.

Inch-pound and SI are independent specification systems. The bracketed stress values are published reference pairings, not an invitation to recalculate individual limits and mix systems. A tension result alone does not prove that plate meets all Grade D requirements: its material identity, analysis basis, dimensions and delivery records must also agree with the order.

One chemistry reference does not mean one analysis column

Ferrobend and American Alloy Steel provide Grade D-specific public chemistry references. American Alloy Steel supplies the explicit manganese heat/product distinction; Ferrobend supplies the silicon thickness bands and the conditional copper wording. These are compilation references, not an official A283/A283M-24 Table 1 extract. The table therefore states each entry’s basis instead of inventing a complete product-analysis grid.

The 0.030% P/S maxima agree across the two compilations but are not represented as confirmed official values of a current ASTM edition. Silicon has a single-compilation basis here. Ferrobend’s single manganese entry is heat-style; the separate 0.98% product reference comes from American Alloy Steel. Do not interpret the absence of a separately established product-carbon value as zero or equality with the heat reference.

If copper-bearing steel is required, write that option on the material line and review the report against that specified condition. If it is not specified, the 0.20% reference should not become a blanket rejection criterion for every Grade D plate. The conditional chemistry option is not an independent guarantee of corrosion performance or approval for another material specification.

Keep dimensions, treatment and additional examinations order-specific

No numerical maximum thickness is stated in the current public Scope. That absence is not a promise of unlimited dimensions or availability. SSAB’s published mill range to 2.00 in. is a producer offering, not the ASTM cap or a Gangsteel stock claim. Submit the required thickness, width, length and quantities for assessment instead of treating a catalogue range as a specification rule.

The public Scope does not establish a default hot-rolled or normalized delivery condition. Its additional A6 provisions for coil furnished without heat treatment or with stress relieving only do not create such a default. Agree the delivered condition and ask for the actual condition to be identified with the material. Any later fabrication treatment needs its own appropriate procedure.

Where impact testing, ultrasonic examination or other supplementary inspection is required, state the test scope and acceptance criteria before order placement. Neither “structural quality” nor Grade D promises a particular impact result, welding procedure or third-party certificate. Set the document form and inspection involvement deliberately, then check that the reports identify the ordered plates and agreed examinations.

Handle adjacent and legacy grades without silently changing the order

ASTM A283 Grade C plate is the other grade named by the 2024 public Scope. It is a related product, not an automatic alternative to Grade D and not the source of this page’s numerical requirements. The legacy ASTM A283 Grade B page concerns a historical designation, not a current grade listed in that Scope. Keep any legacy requirement separate until its edition and approved material basis are resolved.

Grade D also does not become A36, A573, A572 or a vessel grade merely because a project calls for carbon steel. The SA-516 versus A36 comparison explains a broader vessel-versus-structural distinction, not an A283 equivalence table. A proposed substitution needs a clear technical decision and revised purchasing instructions where required.

Grade D offer-review questions

Is a 33 ksi yield requirement enough to define Grade D?

No. It is one public-reference mechanical requirement within a complete material designation. The tensile range, chemistry, dimensions, specimen basis and ordered conditions also matter. Keep ASTM A283/A283M Grade D and the applicable edition on the material line instead of accepting a generic plate offer based only on yield.

Which silicon reference applies at exactly 1 1/2 in. [40 mm]?

The cited Ferrobend reference places that boundary in the “and under” band, with 0.40% maximum. The 0.15–0.40% range is for plate over the boundary. This silicon information has a single-compilation basis; use the ordered unit system and applicable edition when assessing an actual plate.

Can a report show both 0.90% heat and 0.98% product manganese limits?

Yes, those are separately identified public-reference maxima in American Alloy Steel’s Grade D compilation, not contradictory descriptions of one test. Heat and product analyses have different bases. Match each result to its analysis provisions and do not relabel a single heat-style entry as a finished-product requirement.

Does meeting the Grade D tension table qualify plate for pressure-vessel use?

Not automatically. A283 Grade D is a general-application structural carbon material. A mechanical result does not establish approval under a vessel design or a different material specification. The responsible technical authority must resolve the required designation, service suitability and acceptance route before a substitution is purchased.

Can Grade D and legacy Grade B be combined as one interchangeable order line?

Not without resolving the separate material requirements. The 2024 public Scope names C and D; a legacy Grade B page does not add B to that edition. Identify the historical edition and any approved replacement explicitly, rather than allow a quotation shorthand to change the specified material.