{ "metadata": { "name": "JOTAIN alloy steel round-bar RFQ route dataset", "version": "2026-08-26", "record_count": 6, "source_count": 12, "scope": "Public JOTAIN supply-route summaries for six frequently requested alloy and carbon steel bar families.", "limitation": "A comparison route is not a substitution approval. Source links identify standard families and editions, not compliance evidence for a specific heat, bar, or finished part. The accepted order and its named standard, edition, condition, dimensions, tests, certificate, and purchaser approvals control supply." }, "sources": [ { "source_id": "iso-683-1-2016", "label": "ISO 683-1:2016 - Non-alloy steels for quenching and tempering", "publisher": "ISO", "standard_system": "ISO / international", "href": "https://www.iso.org/standard/70642.html", "scope_note": "Official catalogue record for the ISO product and delivery route. The named edition remains current but is under systematic review as of this dataset version." }, { "source_id": "iso-683-2-2016", "label": "ISO 683-2:2016 - Alloy steels for quenching and tempering", "publisher": "ISO", "standard_system": "ISO / international", "href": "https://www.iso.org/standard/70643.html", "scope_note": "Official catalogue record for the ISO product and delivery route. The named edition remains current but is under systematic review as of this dataset version." }, { "source_id": "sae-j403-202402", "label": "SAE J403_202402 - Chemical Compositions of SAE Carbon Steels", "publisher": "SAE International", "standard_system": "SAE / United States", "href": "https://saemobilus.sae.org/standards/j403_202402-chemical-compositions-sae-carbon-steels", "scope_note": "Official SAE record for SAE carbon-steel chemistry designations. It is not a complete bar property or heat-treatment contract." }, { "source_id": "sae-j404-200901", "label": "SAE J404_200901 - Chemical Compositions of SAE Alloy Steels", "publisher": "SAE International", "standard_system": "SAE / United States", "href": "https://saemobilus.sae.org/standards/j404_200901-chemical-compositions-sae-alloy-steels", "scope_note": "Official SAE record for SAE alloy-steel chemistry designations. It is not a complete quenched-and-tempered bar property contract." }, { "source_id": "astm-a322-24", "label": "ASTM A322-24 - Steel Bars, Alloy, Standard Grades", "publisher": "ASTM International", "standard_system": "ASTM / United States", "href": "https://store.astm.org/a0322-24.html", "scope_note": "Official active ASTM product-route record for hot-wrought alloy steel bars. It applies only when the accepted order invokes it." }, { "source_id": "astm-a434-a434m-24", "label": "ASTM A434/A434M-24 - Quenched-and-tempered alloy steel bars", "publisher": "ASTM International", "standard_system": "ASTM / United States", "href": "https://store.astm.org/a0434_a0434m-24.html", "scope_note": "Official active ASTM product-route record. The accepted order still has to name the class, size basis, tests, and document requirements." }, { "source_id": "gbt-3077-2015", "label": "GB/T 3077-2015 - Alloy structure steels", "publisher": "SAMR / SAC", "standard_system": "GB/T / China", "href": "https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=78606D953D9BCAE203395F3FDF2991C6&refer=outter", "scope_note": "Official Chinese national-standard catalogue record for the GB alloy structural-steel route." }, { "source_id": "gbt-699-2015", "label": "GB/T 699-2015 - Quality carbon structure steels", "publisher": "SAMR / SAC", "standard_system": "GB/T / China", "href": "https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=9F80F33DB9597FB0C628094B1525042F&refer=outter", "scope_note": "Official Chinese national-standard catalogue record for the GB quality carbon structural-steel route." }, { "source_id": "gbt-1222-2025", "label": "GB/T 1222-2025 - Spring steels", "publisher": "SAMR / SAC", "standard_system": "GB/T / China", "href": "https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=9BE661E86DB1876258E4FE7ED2457C35", "scope_note": "Official current Chinese national-standard catalogue record for the spring-steel material route. It does not define finished grinding-rod service performance." }, { "source_id": "jis-g-4051-2023", "label": "JIS G 4051:2023 - Carbon steels for machine structural use", "publisher": "Japanese Standards Association", "standard_system": "JIS / Japan", "href": "https://webdesk.jsa.or.jp/books/W11M0090/?bunsyo_id=JIS+G+4051%3A2023", "scope_note": "Official JSA catalogue record for the Japanese machine-structural carbon-steel product route." }, { "source_id": "jis-g-4053-2026", "label": "JIS G 4053:2026 - Low-alloyed steels for machine structural use", "publisher": "Japanese Standards Association", "standard_system": "JIS / Japan", "href": "https://webdesk.jsa.or.jp/books/W11M0090/?bunsyo_id=JIS+G+4053%3A2026", "scope_note": "Official JSA catalogue record for the current Japanese machine-structural low-alloy steel product route." }, { "source_id": "jis-g-4801-2021", "label": "JIS G 4801:2021 - Spring steels", "publisher": "Japanese Standards Association", "standard_system": "JIS / Japan", "href": "https://webdesk.jsa.or.jp/books/W11M0090/?bunsyo_id=JIS+G+4801%3A2021", "scope_note": "Official JSA catalogue record for the Japanese spring-steel material route. It does not define finished grinding-rod service performance." } ], "records": [ { "route_id": "42crmo4-sae-4140", "route_label": "42CrMo4 / SAE 4140", "designation_routes": "42CrMo4 / 1.7225 (ISO or EN route); SAE 4140 (SAE J404 chemistry route); SCM440 (JIS route); 42CrMo (GB route)", "standard_systems": "ISO / EN; SAE; JIS; GB/T; ASTM", "standard_regions": "International / Europe; United States; Japan; China", "substitution_status": "Commonly compared routes; not an automatic equivalence", "controlling_basis": "Name one material or product standard and edition. Do not merge chemistry limits from separate standards.", "product_form": "Round bar", "published_diameter_mm": "20–400", "published_length_m": "3–12 m", "published_condition": "Quenched and tempered (QT)", "published_surface_route": "Black / peeled / machined", "rfq_checks": "Standard and edition; diameter; condition or strength class; test position; sampling; result document", "reference_source_ids": [ "iso-683-2-2016", "sae-j404-200901", "jis-g-4053-2026", "gbt-3077-2015", "astm-a322-24", "astm-a434-a434m-24" ], "canonical_url": "https://jotainmaterials.com/products/42crmo4-4140-round-bar/", "reviewed_on": "2026-08-26" }, { "route_id": "40cr", "route_label": "40Cr", "designation_routes": "40Cr (GB route); 41Cr4 (ISO or EN route); SCr440 (JIS route)", "standard_systems": "GB/T; ISO / EN; JIS", "standard_regions": "China; International / Europe; Japan", "substitution_status": "Comparison routes; purchaser approval required before substitution", "controlling_basis": "Compare the full ordered chemistry, condition, dimensions, properties, and testing requirements.", "product_form": "Round bar", "published_diameter_mm": "20–300", "published_length_m": "3–12 m", "published_condition": "Annealed / quenched and tempered", "published_surface_route": "Hot rolled / forged / machined after review", "rfq_checks": "Governing standard and edition; condition; diameter; property target; test position; sampling; result document", "reference_source_ids": [ "gbt-3077-2015", "iso-683-2-2016", "jis-g-4053-2026" ], "canonical_url": "https://jotainmaterials.com/products/40cr-round-bar/", "reviewed_on": "2026-08-26" }, { "route_id": "ck45-c45-sae-1045", "route_label": "CK45 / C45 / SAE 1045", "designation_routes": "CK45 (legacy DIN drawing language); C45E / 1.1191 and C45 / 1.0503 (EN routes); SAE 1045; S45C (JIS route); 45 (GB route)", "standard_systems": "Legacy DIN drawing language; ISO / EN; SAE; JIS; GB/T", "standard_regions": "Germany / Europe; International / Europe; United States; Japan; China", "substitution_status": "Medium-carbon comparison routes; not interchangeable without review", "controlling_basis": "Keep each designation under its own standard. State product form, condition, dimensions, tests, and certificate separately.", "product_form": "Round bar", "published_diameter_mm": "20–350", "published_length_m": "3–12 m", "published_condition": "Hot rolled / normalized / annealed", "published_surface_route": "As ordered; rough machining and custom lengths after review", "rfq_checks": "Named designation and standard; condition; diameter; property target; test position; inspection document", "reference_source_ids": [ "iso-683-1-2016", "sae-j403-202402", "jis-g-4051-2023", "gbt-699-2015" ], "canonical_url": "https://jotainmaterials.com/products/ck45-1045-round-bar/", "reviewed_on": "2026-08-26" }, { "route_id": "34crnimo6-sae-4340", "route_label": "34CrNiMo6 / SAE 4340", "designation_routes": "34CrNiMo6 / 1.6582 (ISO or EN route); SAE 4340 (SAE J404 chemistry route)", "standard_systems": "ISO / EN; SAE; ASTM", "standard_regions": "International / Europe; United States", "substitution_status": "Commonly compared routes; buyer must approve any change", "controlling_basis": "Name the controlling product standard, QT class or property target, diameter, and required results.", "product_form": "Round bar", "published_diameter_mm": "20–400", "published_length_m": "3–12 m", "published_condition": "Quenched and tempered (QT)", "published_surface_route": "Hot rolled / forged / machined", "rfq_checks": "Product standard; condition or QT class; diameter; test position; sampling; UT scope; result document", "reference_source_ids": [ "iso-683-2-2016", "sae-j404-200901", "astm-a322-24", "astm-a434-a434m-24" ], "canonical_url": "https://jotainmaterials.com/products/34crnimo6-round-bar/", "reviewed_on": "2026-08-26" }, { "route_id": "35crmo", "route_label": "35CrMo", "designation_routes": "35CrMo (GB route); 34CrMo4 (ISO or EN route); SAE 4135", "standard_systems": "GB/T; ISO / EN; SAE", "standard_regions": "China; International / Europe; United States", "substitution_status": "Comparison routes; full-table review and purchaser approval required", "controlling_basis": "Use the chemistry table in the governing standard and keep the ordered condition and property basis separate.", "product_form": "Round bar", "published_diameter_mm": "20–350", "published_length_m": "3–12 m", "published_condition": "Quenched and tempered (QT)", "published_surface_route": "Hot rolled / forged / machined", "rfq_checks": "Governing standard; QT target; diameter; required results; test position; sampling; UT scope", "reference_source_ids": [ "gbt-3077-2015", "iso-683-2-2016", "sae-j404-200901" ], "canonical_url": "https://jotainmaterials.com/products/35crmo-round-bar/", "reviewed_on": "2026-08-26" }, { "route_id": "65mn-grinding-rod", "route_label": "65Mn grinding-rod route", "designation_routes": "65Mn (GB/T spring-steel route); SUP6 or SUP6A (JIS spring-steel route). Any other regional designation needs its own governing standard and clause-level review.", "standard_systems": "GB/T; JIS", "standard_regions": "China; Japan", "substitution_status": "Separate standard routes; not automatic equivalents", "controlling_basis": "The accepted order must fix the grade standard, rod diameter, heat-treatment lot, hardness method and locations, acceptance band, and trial terms.", "product_form": "Finished grinding rod / round-bar feedstock", "published_diameter_mm": "60–160", "published_length_m": "Fixed length to accepted order", "published_condition": "Heat treated / cut to length", "published_surface_route": "Black / peeled / processed after route review", "rfq_checks": "Standard; diameter and length; lot definition; hardness method and locations; straightness sampling; operating history; trial acceptance", "reference_source_ids": [ "gbt-1222-2025", "jis-g-4801-2021" ], "canonical_url": "https://jotainmaterials.com/products/65mn-grinding-rod/", "reviewed_on": "2026-08-26" } ] }