Compare product standards
Check the edition, product form, thickness scope, delivery condition, chemical limits and mechanical test requirements. Q345B, St52-3 and S355JR are often discussed together, but their designation systems and acceptance requirements differ.
Use historical references carefully
The supplied fourth-edition handbook includes GB 712—2011 chemistry tables. These are explicitly historical reference data on this site. The word latest in a file title does not establish that every reproduced standard is current or applicable to a new order.
Document the decision
Prepare a comparison matrix showing every required property and its evidence. Mark missing values as unresolved, retain the exact source and obtain the responsible engineer’s approval. Do not convert an approximate handbook match into a dual-certified product claim.
Information to record
- Exact product standard and edition; approved drawing or specification revision.
- Grade, dimensions, final condition and heat-to-piece traceability.
- Acceptance test, inspection document and responsible approving party.
Why a handbook match is approximate
The supplied World Steel Designation Handbook explains in its December 1998 editorial notes that comparison criteria vary by family: chemistry is common, while low-alloy high-strength grades may be compared mainly by strength. An adjacent designation therefore does not prove identical chemistry, impact testing or approval. The supplied Practical Metal Materials Handbook is a 1999 edition and contains a GB 712—88 shipbuilding entry; those dates must remain attached to any historical comparison.
Frequently asked questions
Are ASTM and ASME grade names interchangeable?
Do not assume this from the prefix. Confirm the exact adopted material specification, edition and code acceptance for the project.
Sources and reference scope
- Procurement and editorial guidance — Cross-checked against product terminology and the cited material rules
Guidance describes checks to request. It is not a claim of available stock, certificates or completed project engineering. - 中外钢铁牌号速查手册（第4版） — PDF pp. 275–277; printed pp. 264–266, tables 5-4/5-5
GB 712—2011 chemistry is historical reference, not a current contract standard. Table footnotes inspected. - 最新金属材料牌号、性能、用途及中外牌号对照速用速查实用手册.1 — 500-page supplied segment; classification and designation sections
Text extraction has symbol/font corruption; not used to establish numeric acceptance limits. - 世界钢号对照手册 — PDF pp.3–5; editorial preface dated December 1998
Explains comparison by chemistry or strength depending on family. Historical approximate comparisons do not establish interchangeability. - 最新实用金属材料手册 — PDF pp.3, 5, 18, 164; printed shipbuilding-steel page 151
1999 first edition; GB 712—88 shipbuilding entry. OCR and page images retained; not used as current numerical acceptance.