--- title: "Heat Treatment — Effects, Benefits & Research" description: "13 articles — Hardening, tempering, annealing, case-hardening and nitriding — what each process changes in the steel, and how it shows up in the…" canonical: https://steelequivalents.com/wiki/heat-treatment language: en robots: index, follow og_type: website type: wiki-category language_alternates: en: https://steelequivalents.com/wiki/heat-treatment.md cs: https://steelequivalents.com/cs/wiki/tepelné-zpracování.md de: https://steelequivalents.com/de/wiki/wärmebehandlung.md es: https://steelequivalents.com/es/wiki/tratamiento-térmico.md fr: https://steelequivalents.com/fr/wiki/traitement-thermique.md hu: https://steelequivalents.com/hu/wiki/hőkezelés.md it: https://steelequivalents.com/it/wiki/trattamento-termico.md nl: https://steelequivalents.com/nl/wiki/warmtebehandeling.md pl: https://steelequivalents.com/pl/wiki/obróbka-cieplna.md pt: https://steelequivalents.com/pt/wiki/tratamento-térmico.md ru: https://steelequivalents.com/ru/вики/термическая-обработка.md tr: https://steelequivalents.com/tr/wiki/ısıl-işlem.md zh: https://steelequivalents.com/zh/维基/热处理.md ja: https://steelequivalents.com/ja/ウィキ/熱処理.md ar: https://steelequivalents.com/ar/ويكي/المعالجة-الحرارية.md ko: https://steelequivalents.com/ko/위키/열처리.md pt-br: https://steelequivalents.com/pt-br/wiki/tratamento-térmico.md hi: https://steelequivalents.com/hi/विकी/ऊष्मा-उपचार.md content_hash: sha256:4d92eb968258605897cc47f29318a4e5392423b6d430efe1e3abdb2523e51552 generated: 2026-09-23 --- > **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/wiki/heat-treatment > Canonical URL: https://steelequivalents.com/wiki/heat-treatment > 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. ![Heat Treatment — steel wiki: properties, standards & testing](/images/uploads/6f1193d6-0617-424a-b02f-ab0ad048b22a/steel-wiki-heat-treatment-banner-1920x548.jpg) # Heat Treatment Hardening, tempering, annealing, case-hardening and nitriding — what each process changes in the steel, and how it shows up in the grade designation. Search 13 Articles — Reviewed Weekly ## Articles [![Austempering and Martempering of Steel — Heat Treatment article, steel wiki](/images/uploads/66b8632f-3433-4248-8748-0ff670a4ac71/wiki-hero-a-side-by-side-editorial-comparison-of-austempering-and-martempering-of-steel-sh-1920x823.jpg) ### Austempering and Martempering of Steel Learn how austempering forms bainite and martempering forms tempered martensite in steel.](/wiki/heat-treatment/austempering-and-martempering-of-steel "Austempering and Martempering of Steel")[![Case Hardening Methods for Steel — Heat Treatment article, steel wiki](/images/uploads/8d25357b-b8d9-476e-b990-401a44de17da/wiki-hero-a-cutaway-steel-gear-showing-a-hard-surface-case-a-gradual-hardness-gradient-and-1920x823.jpg) ### Case Hardening Methods for Steel Compare steel case-hardening methods by chemistry, microstructure, case depth, stress, and ISO verification.](/wiki/heat-treatment/case-hardening-methods-for-steel "Case Hardening Methods for Steel")[![Heat Treatment Distortion and Residual Stress in Steel — Heat Treatment article, steel wiki](/images/uploads/04bd29f1-6a80-48dd-bc9b-7031d130dae1/wiki-hero-a-red-hot-steel-shaft-being-lifted-from-a-quench-tank-with-vapor-rising-from-its-1920x823.jpg) ### Heat Treatment Distortion and Residual Stress in Steel Learn how heat treatment causes steel distortion and residual stress through thermal gradients, phase changes, and quenching.](/wiki/heat-treatment/heat-treatment-distortion-and-residual-stress-in-steel "Heat Treatment Distortion and Residual Stress in Steel")[![Heat Treatment Fundamentals for Steel — Heat Treatment article, steel wiki](/images/uploads/7f161ea3-71e2-478b-8652-51080f41bb4b/wiki-hero-a-steel-gear-being-heat-treated-in-a-controlled-atmosphere-furnace-beside-a-quen-1920x823.jpg) ### Heat Treatment Fundamentals for Steel Learn how composition, temperature, time, and cooling shape steel heat-treatment results.](/wiki/heat-treatment/heat-treatment-fundamentals "Heat Treatment Fundamentals for Steel")[![Quenching Media and Cooling Severity — Heat Treatment article, steel wiki](/images/uploads/ec7453df-07e1-4ace-9d48-9825eb2553f7/wiki-hero-austenitized-steel-component-entering-an-industrial-quench-tank-with-vapor-formi-1920x823.jpg) ### Quenching Media and Cooling Severity Learn how quenchants, temperature, agitation, and cooling stages affect steel quenching.](/wiki/heat-treatment/quenching-media-and-cooling-severity "Quenching Media and Cooling Severity")[![Steel Annealing and Normalizing Treatments — Heat Treatment article, steel wiki](/images/uploads/4c88f479-1bae-4fc4-94cb-7bbdffa761e0/wiki-hero-a-thick-alloy-steel-forging-being-removed-from-a-heat-treatment-furnace-for-norm-1920x823.jpg) ### Steel Annealing and Normalizing Treatments Compare steel annealing and normalizing treatments by temperature, cooling rate, steel grade, and standard.](/wiki/heat-treatment/steel-annealing-and-normalizing-treatments "Steel Annealing and Normalizing Treatments")[![Steel Decarburization: Causes, Measurement, and Control — Heat Treatment article, steel wiki](/images/uploads/82d4c658-7cb1-4ba5-a309-424d38c59341/wiki-hero-a-polished-steel-cross-section-showing-a-decarburized-ferritic-surface-layer-gra-1920x823.jpg) ### Steel Decarburization: Causes, Measurement, and Control Learn how steel decarburization forms, how to measure it, and how to control it.](/wiki/heat-treatment/steel-decarburization-causes-measurement-and-control "Steel Decarburization: Causes, Measurement, and Control")[![Steel Hardenability and the Jominy End-Quench Test — Heat Treatment article, steel wiki](/images/uploads/f70dbb22-778e-4edc-abbb-994bf3362b26/wiki-hero-a-steel-jominy-end-quench-test-specimen-positioned-vertically-above-a-controlled-1920x823.jpg) ### Steel Hardenability and the Jominy End-Quench Test Learn how the Jominy test measures steel hardenability and how chemistry, grain size, and quenching shape results.](/wiki/heat-treatment/steel-hardenability-and-the-jominy-test "Steel Hardenability and the Jominy End-Quench Test")[![Steel Heat Treatment Atmospheres and Surface Protection — Heat Treatment article, steel wiki](/images/uploads/405f246a-bda5-4aba-968d-bde00110e220/wiki-hero-a-controlled-atmosphere-heat-treatment-furnace-opening-with-a-steel-load-inside-1920x823.jpg) ### Steel Heat Treatment Atmospheres and Surface Protection Learn how to match heat-treatment atmospheres to steel grades and control oxidation, scale, decarburization, and carbon potential.](/wiki/heat-treatment/steel-heat-treatment-atmospheres-and-surface-protection "Steel Heat Treatment Atmospheres and Surface Protection")[![Steel Heat Treatment Process Selection: A Standards-Based Guide — Heat Treatment article, steel wiki](/images/uploads/41e1e333-2646-4d91-a80f-d97765ab4ccf/wiki-hero-a-steel-gear-shaft-and-forged-component-moving-through-a-controlled-heat-treatme-1920x823.jpg) ### Steel Heat Treatment Process Selection: A Standards-Based Guide Select the right steel heat treatment using grade, hardness, depth, geometry, and distortion risk.](/wiki/heat-treatment/steel-heat-treatment-process-selection "Steel Heat Treatment Process Selection: A Standards-Based Guide")[![Steel Tempering Response and Secondary Hardening — Heat Treatment article, steel wiki](/images/uploads/151f6ba8-5812-40ee-9739-824d58d1c55a/wiki-hero-a-hardened-steel-specimen-changing-from-as-quenched-martensite-to-tempered-marte-1920x823.jpg) ### Steel Tempering Response and Secondary Hardening Explore how composition and heat treatment govern steel tempering, secondary hardening, and Hollomon-Jaffe analysis.](/wiki/heat-treatment/steel-tempering-response-and-secondary-hardening "Steel Tempering Response and Secondary Hardening")[![Steel Transformation Temperatures and Phases — Heat Treatment article, steel wiki](/images/uploads/42f37647-ca7e-4aca-8147-3f8824994bb6/wiki-hero-a-polished-steel-cross-section-showing-ferrite-pearlite-bainite-martensite-and-r-1920x823.jpg) ### Steel Transformation Temperatures and Phases Explore how steel composition and cooling shape transformation temperatures, pearlite, bainite, and martensite.](/wiki/heat-treatment/steel-transformation-temperatures-and-phases "Steel Transformation Temperatures and Phases")[![Steel Weld Heat-Affected Zone Metallurgy — Heat Treatment article, steel wiki](/images/uploads/796b2138-93f3-4df9-8f62-9924a1238e85/wiki-hero-a-transverse-steel-weld-cross-section-showing-the-fusion-zone-fusion-boundary-co-1920x823.jpg) ### Steel Weld Heat-Affected Zone Metallurgy Learn how cooling rate, chemistry, and reheating shape HAZ hardness, toughness, cracking, and corrosion.](/wiki/heat-treatment/steel-weld-heat-affected-zone-metallurgy "Steel Weld Heat-Affected Zone Metallurgy") [Back to Wiki](/wiki "Steel Wiki — Grades, Standards & Material Properties")