--- title: "ASTM steel grades — 2441 designations — Page 37" description: "Steel grades designated under ASTM, with chemical composition, mechanical properties and equivalents in other standards. 2441 designations across…" canonical: https://steelequivalents.com/materials/astm/page/37 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/astm/page/37.md cs: https://steelequivalents.com/cs/materiály/astm.md de: https://steelequivalents.com/de/werkstoffe/astm.md es: https://steelequivalents.com/es/materiales/astm.md fr: https://steelequivalents.com/fr/matériaux/astm.md hu: https://steelequivalents.com/hu/anyagok/astm.md it: https://steelequivalents.com/it/materiali/astm.md nl: https://steelequivalents.com/nl/materialen/astm.md pl: https://steelequivalents.com/pl/materiały/astm.md pt: https://steelequivalents.com/pt/materiais/astm.md ru: https://steelequivalents.com/ru/материалы/astm.md tr: https://steelequivalents.com/tr/malzemeler/astm.md zh: https://steelequivalents.com/zh/材料/astm.md ja: https://steelequivalents.com/ja/材料/astm.md ar: https://steelequivalents.com/ar/المواد/astm.md ko: https://steelequivalents.com/ko/재료/astm.md pt-br: https://steelequivalents.com/pt-br/materiais/astm.md hi: https://steelequivalents.com/hi/सामग्री/astm.md content_hash: sha256:fe44ce820e29519f4c492ca29f9ea76bb542791e1c0b20725d6b1e92ae94dabb generated: 2026-09-26 --- > **Machine-readable Markdown rendering.** This is a Markdown representation of a web page, > served for AI agents and crawlers as a token-efficient alternative to the full HTML. > Full interactive HTML version: https://steelequivalents.com/materials/astm/page/37 > Canonical URL: https://steelequivalents.com/materials/astm/page/37 > Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi > Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything > below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. ASTM · 2,441 grades # ASTM steel grades — 2441 designations — Page 37 Every grade designated under ASTM, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute. ## Also known as 2441 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [B 162](/materials/astm/b162 "B 162") | [2.4060](/materials/material-no/2.4060 "2.4060") | Nickel and cobalt alloys | ≤ 0.08 | 4 | | [B 163](/materials/astm/b163 "B 163") | [2.4060](/materials/material-no/2.4060 "2.4060") | Nickel and cobalt alloys | ≤ 0.08 | 4 | | [B 163](/materials/astm/b163 "B 163") | [2.4061](/materials/material-no/2.4061 "2.4061") | Nickel and cobalt alloys | ≤ 0.02 | 3 | | [B 164](/materials/astm/b-164 "B 164") | [2.4360](/materials/material-no/2.4360 "2.4360") | Nickel and cobalt alloys | ≤ 0.15 | 7 | | [B 164](/materials/astm/b-164 "B 164") | [2.4363](/materials/material-no/2.4363 "2.4363") | Others | ≤ 0.3 | 3 | | [B 166](/materials/astm/b166 "B 166") | [2.4627](/materials/material-no/2.4627 "2.4627") | Others | ≤ 0.1 | 3 | | [B 166](/materials/astm/b166 "B 166") | [2.4663](/materials/material-no/2.4663 "2.4663") | Nickel and cobalt alloys | 0.05–0.1 | 6 | | [B 166](/materials/astm/b166 "B 166") | [2.4951](/materials/material-no/2.4951 "2.4951") | High-temperature steels | 0.08–0.15 | 6 | | [B 166](/materials/astm/b166 "B 166") | [Ni 6617](/materials/material-no/ni-6617 "Ni 6617") | Others | 0.05–0.15 | 3 | | [B 168](/materials/astm/b168 "B 168") | [2.4817](/materials/material-no/2.4817 "2.4817") | Others | ≤ 0.025 | 3 | | [B 185](/materials/astm/b-185 "B 185") | [2.4360](/materials/material-no/2.4360 "2.4360") | Nickel and cobalt alloys | ≤ 0.15 | 7 | | [B 366](/materials/astm/b366 "B 366") | [2.4660](/materials/material-no/2.4660 "2.4660") | Nickel and cobalt alloys | ≤ 0.07 | 4 | | [B 366](/materials/astm/b366 "B 366") | [1.4876](/materials/material-no/1.4876 "1.4876") | Heat resistant steels | ≤ 0.12 | 12 | | [B 366](/materials/astm/b366 "B 366") | [2.4856](/materials/material-no/2.4856 "2.4856") | Heat resistant steels | 0.03–0.1 | 5 | | [B 366](/materials/astm/b366 "B 366") | [2.4060](/materials/material-no/2.4060 "2.4060") | Nickel and cobalt alloys | ≤ 0.08 | 4 | | [B 388](/materials/astm/b-388 "B 388") | [1.3912](/materials/material-no/1.3912 "1.3912") | Controlled-expansion nickel-iron alloys | — | 4 | | [B 407](/materials/astm/b407 "B 407") | [1.4876](/materials/material-no/1.4876 "1.4876") | Heat resistant steels | ≤ 0.12 | 12 | | [B 408](/materials/astm/b408 "B 408") | [1.4876](/materials/material-no/1.4876 "1.4876") | Heat resistant steels | ≤ 0.12 | 12 | | [B 409](/materials/astm/b409 "B 409") | [1.4876](/materials/material-no/1.4876 "1.4876") | Heat resistant steels | ≤ 0.12 | 12 | | [B 423](/materials/astm/b-423 "B 423") | [2.4858](/materials/material-no/2.4858 "2.4858") | Nickel and cobalt alloys | ≤ 0.025 | 4 | | [B 424](/materials/astm/b-424 "B 424") | [2.4858](/materials/material-no/2.4858 "2.4858") | Nickel and cobalt alloys | ≤ 0.025 | 4 | | [B 425](/materials/astm/b-425 "B 425") | [2.4858](/materials/material-no/2.4858 "2.4858") | Nickel and cobalt alloys | ≤ 0.025 | 4 | | [B 443](/materials/astm/b-443 "B 443") | [2.4856](/materials/material-no/2.4856 "2.4856") | Heat resistant steels | 0.03–0.1 | 5 | | [B 443 Gr 1](/materials/astm/b-443-gr-1 "B 443 Gr 1") | [2.4831](/materials/material-no/2.4831 "2.4831") | Others | ≤ 0.1 | 3 | | [B 443 Gr 1](/materials/astm/b-443-gr-1 "B 443 Gr 1") | [2.4856](/materials/material-no/2.4856 "2.4856") | Heat resistant steels | 0.03–0.1 | 5 | | [B 443 Gr 1](/materials/astm/b-443-gr-1 "B 443 Gr 1") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | Heat resistant steels | ≤ 0.1 | 3 | | [B 443 Gr 1](/materials/astm/b-443-gr-1 "B 443 Gr 1") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | Heat resistant steels | ≤ 0.1 | 3 | | [B 446](/materials/astm/b-446 "B 446") | [2.4856](/materials/material-no/2.4856 "2.4856") | Heat resistant steels | 0.03–0.1 | 5 | | [B 446](/materials/astm/b-446 "B 446") | [2.4831](/materials/material-no/2.4831 "2.4831") | Others | ≤ 0.1 | 3 | | [B 446](/materials/astm/b-446 "B 446") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | Heat resistant steels | ≤ 0.1 | 3 | | [B 446](/materials/astm/b-446 "B 446") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | Heat resistant steels | ≤ 0.1 | 3 | | [B 463](/materials/astm/b-463 "B 463") | [2.4660](/materials/material-no/2.4660 "2.4660") | Nickel and cobalt alloys | ≤ 0.07 | 4 | | [B 464](/materials/astm/b-464 "B 464") | [2.4660](/materials/material-no/2.4660 "2.4660") | Nickel and cobalt alloys | ≤ 0.07 | 4 | | [B 473](/materials/astm/b-473 "B 473") | [2.4660](/materials/material-no/2.4660 "2.4660") | Nickel and cobalt alloys | ≤ 0.07 | 4 | | [B 515](/materials/astm/b-515 "B 515") | [1.4876](/materials/material-no/1.4876 "1.4876") | Heat resistant steels | ≤ 0.12 | 12 | | [B 546](/materials/astm/b546 "B 546") | [2.4060](/materials/material-no/2.4060 "2.4060") | Nickel and cobalt alloys | ≤ 0.08 | 4 | | [B 564](/materials/astm/b564 "B 564") | [2.4858](/materials/material-no/2.4858 "2.4858") | Nickel and cobalt alloys | ≤ 0.025 | 4 | | [B 564](/materials/astm/b564 "B 564") | [2.4856](/materials/material-no/2.4856 "2.4856") | Heat resistant steels | 0.03–0.1 | 5 | | [B 572](/materials/astm/b572 "B 572") | [2.4603](/materials/material-no/2.4603 "2.4603") | Nickel and cobalt alloys | ≤ 0.03 | 3 | | [B 572](/materials/astm/b572 "B 572") | [2.4613](/materials/material-no/2.4613 "2.4613") | Others | ≤ 0.1 | 3 | | [B 572](/materials/astm/b572 "B 572") | [2.4665](/materials/material-no/2.4665 "2.4665") | High-temperature steels | 0.05–0.15 | 11 | | [B 572](/materials/astm/b572 "B 572") | [Ni 6002](/materials/material-no/ni-6002 "Ni 6002") | Others | 0.05–0.15 | 3 | | [B 572](/materials/astm/b572 "B 572") | [Ni 6002](/materials/material-no/ni-6002 "Ni 6002") | Others | 0.05–0.15 | 3 | | [B 575](/materials/astm/b575 "B 575") | [2.4602](/materials/material-no/2.4602 "2.4602") | Nickel and cobalt alloys | ≤ 0.01 | 5 | | [B 637](/materials/astm/b637 "B 637") | [2.4631](/materials/material-no/2.4631 "2.4631") | High-temperature steels / aviation variant | 0.04–0.1 | 5 | | [B 637](/materials/astm/b637 "B 637") | [2.4669](/materials/material-no/2.4669 "2.4669") | High-temperature steels | ≤ 0.08 | 8 | | [B 637](/materials/astm/b637 "B 637") | [2.4654](/materials/material-no/2.4654 "2.4654") | Nickel and cobalt alloys | 0.02–0.1 | 6 | | [B 637](/materials/astm/b637 "B 637") | [2.4667](/materials/material-no/2.4667 "2.4667") | Resistance heating alloys | ≤ 0.08 | 3 | | [B 637](/materials/astm/b637 "B 637") | [Ni 7718](/materials/material-no/ni-7718 "Ni 7718") | Resistance heating alloys | ≤ 0.08 | 3 | | [B 670](/materials/astm/b670 "B 670") | [2.4667](/materials/material-no/2.4667 "2.4667") | Resistance heating alloys | ≤ 0.08 | 3 | **This grade’s own name** — recorded in our sources as this grade’s own designation under that standard. **Indicative** — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. **Withdrawn** — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. [Previous](/materials/astm/page/36 "Previous") Page 37 of 49[Next](/materials/astm/page/38 "Next")