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Structural Steel

Carbon & structural steel for custom plate parts.

Buyers often compare Q355-family, S355-family, ASTM structural grades and Japanese structural grades. YUNCUT treats those comparisons as a starting point. The governing standard, subgrade, thickness, delivery condition and required documents are confirmed before any substitution is accepted.

Discuss Grade + PartGrade Comparison
StandardSpecify the governing document
SubgradeImpact / Z / delivery condition if required
PartConnect material to process and acceptance
Structural steel plate
Grade Review

“Equivalent” does not mean automatically interchangeable.

Yield strength is only one comparison point. Chemistry, thickness limits, impact requirements, delivery condition and testing rules can differ by standard.

Q355-familyState the exact subgrade and governing GB/T requirement rather than using “Q355” as a complete specification.
S355-familyState the EN grade/subgrade and any impact-temperature or delivery-condition requirement.
ASTM gradesA36, A572 Grade 50 and other ASTM products are reviewed against the required standard — not mapped one-to-one by strength alone.
Japanese gradesJIS structural grades are compared by the actual specification and use case; shorthand “same as” statements are avoided.
If a China-side alternative is proposed, the RFQ should identify it explicitly and record any material differences that matter to the buyer’s drawing, standard or acceptance criteria.
From Material to Part

A material page should lead to a purchasable outcome.

These routes connect structural steel selection to geometry, processing and proof.

Part

Rings, Flanges & Discs

Circular plate parts where material identity, dimensions, holes and machining allowance may all matter.

Explore →Part

Base Plates & Frames

Structural plate parts where datums, holes, flatness and delivered condition are procurement-critical.

Explore →Process

Cutting Solutions

Compare laser and flame fit for the actual grade, thickness and geometry.

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Send the governing grade requirement with the part.

Share standard, grade/subgrade, thickness, quantity, geometry, destination and any certificate or testing requirement.

Start RFQRFQ Checklist