--- title: "A194 Grade B8 — Non-magnetic steels" description: "A194 Grade B8 in ASTM: material number 1.3964, also listed as X2CrNiMnMoNNb21-16-5-3. It is a material in the category Non-magnetic steels." canonical: https://steelequivalents.com/materials/astm/a194-grade-b8 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/a194-grade-b8.md cs: https://steelequivalents.com/cs/materiály/astm/a194-grade-b8.md de: https://steelequivalents.com/de/werkstoffe/astm/a194-grade-b8.md es: https://steelequivalents.com/es/materiales/astm/a194-grade-b8.md fr: https://steelequivalents.com/fr/matériaux/astm/a194-grade-b8.md hu: https://steelequivalents.com/hu/anyagok/astm/a194-grade-b8.md it: https://steelequivalents.com/it/materiali/astm/a194-grade-b8.md nl: https://steelequivalents.com/nl/materialen/astm/a194-grade-b8.md pl: https://steelequivalents.com/pl/materiały/astm/a194-grade-b8.md pt: https://steelequivalents.com/pt/materiais/astm/a194-grade-b8.md ru: https://steelequivalents.com/ru/материалы/astm/a194-grade-b8.md tr: https://steelequivalents.com/tr/malzemeler/astm/a194-grade-b8.md zh: https://steelequivalents.com/zh/材料/astm/a194-grade-b8.md ja: https://steelequivalents.com/ja/材料/astm/a194-grade-b8.md ar: https://steelequivalents.com/ar/المواد/astm/a194-grade-b8.md ko: https://steelequivalents.com/ko/재료/astm/a194-grade-b8.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/a194-grade-b8.md hi: https://steelequivalents.com/hi/सामग्री/astm/a194-grade-b8.md content_hash: sha256:1efd32e5a35e1fb2328ffabd413d810760bdb8a81d75b6ed88d74ef9ae49a2d9 generated: 2026-09-24 --- > **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/a194-grade-b8 > Canonical URL: https://steelequivalents.com/materials/astm/a194-grade-b8 > 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 · United States · 11 designations # A194 Grade B8 A194 Grade B8 is a designation in ASTM for the material held under material number 1.3964, also listed as X2CrNiMnMoNNb21-16-5-3. It is a material in the category Non-magnetic steels. We list 11 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM and SAE AMS. - [*Material no.* **1.3964**](/materials/material-no/1.3964 "Material no.: 1.3964") - [*Category* **Non-magnetic steels · 31 grades**](/categories/non-magnetic-steels "Category: Non-magnetic steels · 31 grades") - *Designations* **11** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=a33555dd-895c-41fe-9d76-8d98ed2f13f6&designation=21ff3e51-a177-4d36-8efc-9a5f4d9eb3fc "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a194-grade-b8.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X2CrNiMnMoNNb21-16-5-3 This grade’s own name](/materials/din-en/x2crnimnmonnb21-16-5-3 "DIN / EN X2CrNiMnMoNNb21-16-5-3") - [UNS S20910 This grade’s own name](/materials/uns/s20910 "UNS S20910") - [AISI / SAE XM-19 This grade’s own name](/materials/aisi-sae/xm-19 "AISI / SAE XM-19") ## About Non-magnetic steels Non-magnetic steels are alloy steels designed to have very low magnetic response while retaining useful mechanical strength and ductility. They are used for components and structures where magnetic interference must be minimised, including specialised electrical, laboratory and mechanical equipment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 11 designations · 5 standards · nothing hidden 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. DIN / EN Europe · 1 - [X2CrNiMnMoNNb21-16-5-3 This grade’s own name](/materials/din-en/x2crnimnmonnb21-16-5-3 "DIN / EN X2CrNiMnMoNNb21-16-5-3") UNS United States · 1 - [S20910 This grade’s own name](/materials/uns/s20910 "UNS S20910") AISI / SAE United States · 1 - [XM-19 This grade’s own name](/materials/aisi-sae/xm-19 "AISI / SAE XM-19") ASTM United States · 7 - [A193 Grade B8R Indicative](/materials/astm/a193-grade-b8r "ASTM A193 Grade B8R") - **A194 Grade B8 Indicative** - [A240 Indicative](/materials/astm/a240 "ASTM A240") - [A276 Indicative](/materials/astm/a276 "ASTM A276") - [A314 Indicative](/materials/astm/a314 "ASTM A314") - [A412 Indicative](/materials/astm/a412 "ASTM A412") - [A479 Indicative](/materials/astm/a479 "ASTM A479") SAE AMS United States / Aerospace · 1 - [5764 Indicative bar forging ring](/materials/ams/5764 "SAE AMS 5764") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Cr Ni Mn Iron — the balance, never listed by a standard — 53.4 % Cr — 20.8 % Ni — 16 % Mn — 5 % Traces & impurities · 4.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.03 | | Si | ≤ 1 | | Mn | 4–6 | | P | 0.025 | | S | 0.01 | | Cr | 20–21.5 | | Mo | 3–3.5 | | Ni | 15–17 | | Nb | ≤ 0.25 | | N | 0.2–0.35 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Niobium Nitrogen 0.01 % 0.1 % 1 % 10 % 100 % The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other. | Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound | |---|---|---|---|---| | C | ≤0,03 | — | 0.030 | Max | | N | 0,20-0,35 | 0.200 | 0.350 | Range | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,01 | 0.010 | 0.010 | Exact | | Cr | 20,0-21,5 | 20.000 | 21.500 | Range | | Mn | 4,00-6,00 | 4.000 | 6.000 | Range | | Ni | 15,0-17,0 | 15.000 | 17.000 | Range | | Nb | ≤0,25 | — | 0.250 | Max | | Mo | 3,00-3,50 | 3.000 | 3.500 | Range | The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred. ## Predicted transformation temperatures This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## Physical & mechanical properties Density 7,9 g/cm³ Exact An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.3, a shared category, and a published range for Cr / Ni that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [X2CrNiMnMoNNb21-15-7-3 1.3914 Cr 20,0-22,0 · Ni 14,0-16,0 - ΔCr 0.25 - ΔNi 1.00 - 1 designations](/materials/din-en/x2crnimnmonnb21-15-7-3 "X2CrNiMnMoNNb21-15-7-3")[X2CrNiMoNbN21-15 1.3957 Cr 20,0-22,0 · Ni 14,0-16,0 - ΔCr 0.25 - ΔNi 1.00 - 1 designations](/materials/din-en/x2crnimonbn21-15 "X2CrNiMoNbN21-15")[X2CrNiMnMoNNb23-17-6-3 1.3974 Cr 21,0-24,5 · Ni 15,5-18,0 - ΔCr 2.00 - ΔNi 0.75 - 1 designations](/materials/din-en/x2crnimnmonnb23-17-6-3 "X2CrNiMnMoNNb23-17-6-3")[X2CrNiMoN22-15 1.3951 Cr 21,5-24,0 · Ni 14,0-16,0 - ΔCr 2.00 - ΔNi 1.00 - 1 designations](/materials/din-en/x2crnimon22-15 "X2CrNiMoN22-15")[X4CrNiMnMoN19-13-8 1.3948 Cr 17,5-20,0 · Ni 12,0-15,0 - ΔCr 2.00 - ΔNi 2.50 - 1 designations](/materials/din-en/x4crnimnmon19-13-8 "X4CrNiMnMoN19-13-8") ## Looking for this grade under another name? Search the catalogue by designation, material number or composition — every name on this page is itself a way in. [Search](/search "Steel grade search")[Inquiry](/inquiry?material=a33555dd-895c-41fe-9d76-8d98ed2f13f6&designation=21ff3e51-a177-4d36-8efc-9a5f4d9eb3fc "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a194-grade-b8.pdf "Datasheet as PDF")