--- title: "Calculated Values — Effects, Benefits & Research" description: "9 articles — The values engineers work out rather than look up — PREN for pitting resistance, carbon equivalent for weldability, and the formulas behind…" canonical: https://steelequivalents.com/wiki/calculated-values language: en robots: index, follow og_type: website type: wiki-category language_alternates: en: https://steelequivalents.com/wiki/calculated-values.md cs: https://steelequivalents.com/cs/wiki/vypočítané-hodnoty.md de: https://steelequivalents.com/de/wiki/berechnete-kennwerte.md es: https://steelequivalents.com/es/wiki/valores-calculados.md fr: https://steelequivalents.com/fr/wiki/valeurs-calculées.md hu: https://steelequivalents.com/hu/wiki/számított-értékek.md it: https://steelequivalents.com/it/wiki/valori-calcolati.md nl: https://steelequivalents.com/nl/wiki/berekende-waarden.md pl: https://steelequivalents.com/pl/wiki/wartości-obliczane.md pt: https://steelequivalents.com/pt/wiki/valores-calculados.md ru: https://steelequivalents.com/ru/вики/расчётные-величины.md tr: https://steelequivalents.com/tr/wiki/hesaplanan-değerler.md zh: https://steelequivalents.com/zh/维基/计算得出的数值.md ja: https://steelequivalents.com/ja/ウィキ/計算で求める値.md ar: https://steelequivalents.com/ar/ويكي/القيم-المحسوبة.md ko: https://steelequivalents.com/ko/위키/계산으로-얻는-값.md pt-br: https://steelequivalents.com/pt-br/wiki/valores-calculados.md hi: https://steelequivalents.com/hi/विकी/परिकलित-मान.md content_hash: sha256:1f0d7e1c806b6149ae2d56af3f738a6dca0d145b269588417297dbe9ff29a7f1 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/wiki/calculated-values > Canonical URL: https://steelequivalents.com/wiki/calculated-values > 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. ![Calculated Values — steel wiki: properties, standards & testing](/images/uploads/32cbf9ce-489c-4c4a-b20c-5183949228af/steel-wiki-calculated-values-banner-1920x548.jpg) # Calculated Values The values engineers work out rather than look up — PREN for pitting resistance, carbon equivalent for weldability, and the formulas behind them. Search 9 Articles — Reviewed Weekly ## Articles [![Carbon Equivalent Calculations for Welding — Calculated Values article, steel wiki](/images/uploads/a9505256-43bd-4f1a-bccf-3273b98a70c1/wiki-hero-a-steel-plate-joint-being-welded-with-the-weld-bead-fusion-boundary-and-heat-aff-1920x823.jpg) ### Carbon Equivalent Calculations for Welding Learn how to calculate CEIIW, Pcm, CET, CEq, and CEN from steel chemistry and use them to assess weldability.](/wiki/calculated-values/carbon-equivalent-calculations "Carbon Equivalent Calculations for Welding")[![Fatigue Crack-Growth Testing and Paris Law for Steel — Calculated Values article, steel wiki](/images/uploads/fc8bcb68-deef-471a-b47e-febbe118d15a/wiki-hero-a-compact-tension-steel-specimen-undergoing-fatigue-crack-growth-testing-in-a-la-1920x823.jpg) ### Fatigue Crack-Growth Testing and Paris Law for Steel Learn how fatigue crack growth, Paris law constants, ASTM E647, and ISO 12108 guide steel testing.](/wiki/calculated-values/fatigue-crack-growth-testing-and-paris-law-for-steel "Fatigue Crack-Growth Testing and Paris Law for Steel")[![Hardness Conversion and Property Relationships in Steel — Calculated Values article, steel wiki](/images/uploads/a0a70b15-6e91-4cce-bf76-3e4c06914bd2/wiki-hero-a-steel-hardness-laboratory-with-a-brinell-tester-rockwell-tester-and-vickers-mi-1920x823.jpg) ### Hardness Conversion and Property Relationships in Steel Understand HBW, HRC, and HV conversions, standards, and why hardness cannot replace tensile testing.](/wiki/calculated-values/hardness-conversion-and-property-relationships "Hardness Conversion and Property Relationships in Steel")[![Pitting Resistance Equivalent Number Calculations — Calculated Values article, steel wiki](/images/uploads/958e5c85-7eea-4256-8b87-69f73223d656/wiki-hero-a-stainless-steel-surface-showing-a-chromium-rich-passive-film-chloride-ions-rea-1920x823.jpg) ### Pitting Resistance Equivalent Number Calculations Calculate PREN from chromium, molybdenum, and nitrogen, compare variants, and understand its limits versus ASTM G48 testing.](/wiki/calculated-values/pitting-resistance-equivalent-number-calculations "Pitting Resistance Equivalent Number Calculations")[![Steel Density, Mass, and Volume Calculations — Calculated Values article, steel wiki](/images/uploads/a09ae48c-88de-482f-aebc-36cf9d1c6e6e/wiki-hero-a-fabricated-structural-steel-beam-and-rectangular-steel-plate-beside-precision-1920x823.jpg) ### Steel Density, Mass, and Volume Calculations Calculate steel mass, volume, and mass per metre using 7850 kg/m³, geometry, and unit conversions.](/wiki/calculated-values/steel-density-mass-and-volume-calculations "Steel Density, Mass, and Volume Calculations")[![Steel Elastic Constants and Modulus Relationships — Calculated Values article, steel wiki](/images/uploads/175a785a-4c61-40a6-a8ff-16896aa24698/wiki-hero-a-steel-specimen-at-the-center-of-four-connected-elastic-deformation-modes-axial-1920x823.jpg) ### Steel Elastic Constants and Modulus Relationships Learn how steel’s E, G, K, and ν relate, and why temperature, texture, phase, and testing affect their values.](/wiki/calculated-values/steel-elastic-constants-and-modulus-relationships "Steel Elastic Constants and Modulus Relationships")[![Steel Fatigue Properties and S–N Curves — Calculated Values article, steel wiki](/images/uploads/5df20d01-f4a7-471e-a675-f1e35ef47d03/wiki-hero-a-steel-welded-attachment-with-a-visible-fatigue-crack-growing-from-the-weld-toe-1920x823.jpg) ### Steel Fatigue Properties and S–N Curves Understand how stress ratio, geometry, surface condition, weld details, loading spectra, test methods, and statistical design curves affect steel fatigue life.](/wiki/calculated-values/steel-fatigue-properties-and-s-n-curves "Steel Fatigue Properties and S–N Curves")[![Steel Section Property Calculations: Areas, Inertia, Moduli, and Torsion — Calculated Values article, steel wiki](/images/uploads/b515a93f-4679-4f22-a6ba-56d4905b2b71/wiki-hero-a-steel-i-section-cross-section-with-its-centroid-major-and-minor-axes-area-dist-1920x823.jpg) ### Steel Section Property Calculations: Areas, Inertia, Moduli, and Torsion Learn to calculate key steel section properties with formulas, units, tables, and design applications.](/wiki/calculated-values/steel-section-property-calculations "Steel Section Property Calculations: Areas, Inertia, Moduli, and Torsion")[![Steel Thermal Expansion and Temperature-Dependent Properties — Calculated Values article, steel wiki](/images/uploads/33e15f44-df90-4c6a-b133-1da93cccf80a/wiki-hero-a-structural-steel-beam-and-bolted-connection-exposed-to-intense-heat-showing-un-1920x823.jpg) ### Steel Thermal Expansion and Temperature-Dependent Properties Learn how temperature changes affect steel expansion, strength, stiffness, and fire performance.](/wiki/calculated-values/steel-thermal-expansion-and-temperature-dependent-properties "Steel Thermal Expansion and Temperature-Dependent Properties") [Back to Wiki](/wiki "Steel Wiki — Grades, Standards & Material Properties")