HeatTreatBench: Knife Steels

Bladesmith Heat Treat Recipes

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Pick your steel, set your target HRC, get the exact austenitize, soak, quench and temper. Works offline at the forge. Pay once — no subscription, no account. HeatTreatBench is a focused, offline reference and logbook for knifemakers who heat-treat their own blades. Pick a steel, dial in a target hardness, and get a clear starting recipe: austenitize temperature, soak time, quench medium, whether cryo is needed, and the temper temperature, time and cycles for that hardness. No account, no cloud, no tracking. Buy once, use it forever, at the forge with no signal. WHAT IT DOES - Curated steel database. A hand-built dataset covering popular knife steels across carbon, low-alloy, stainless and powder-metallurgy / tool grades (1084, 1095, 80CrV2, W2, AEB-L, 14C28N, CPM-3V, D2 and more). Every steel shows austenitize, soak, quench, cryo, and temper guidance. - Target-hardness recipe engine. Choose your target HRC and the recipe updates to the matching temper temperature. Values between data points are interpolated and labelled as such; the app never extrapolates past a steel's reliable range - if you ask for a hardness outside the data, it tells you so instead of inventing a number. - Hardness to temper table. See how target HRC maps to temper temperature so you can trade hardness for toughness depending on the blade's job. - Soak and temper timers. Lock-screen countdowns that keep running with the screen off and alert you when the soak or each temper cycle is done, including a reminder to cool to room temperature between cycles. Fully on-device, no push server. - Tempering oxide color reference. A wide-color (P3) chart of carbon-steel temper colors with approximate temperatures. Clearly marked as a visual reference only - thin-film interference colors are affected by screen brightness, ambient light and display age, and are not a measurement of temperature or hardness. - Blade log. Record every blade you run: steel, as-run furnace temperature, soak, quench, temper, measured HRC, outcome and notes. Repeat your wins and diagnose the failures. You can scan a hardness-tester reading with the camera (on-device text recognition) to save typing - the value is always editable. - PDF export. Export a single-page heat-treat record for any blade to save, print or share. Everything stays on your device. EVERYTHING OFFLINE, NOTHING COLLECTED The whole app works in airplane mode. There is no account, no sign-in, no analytics and no advertising. Your blade log, photos and notes never leave your device, and the camera is used only for on-device reading of a hardness number you choose to scan. DATA SOURCING AND DISCLAIMER Every recipe is a reference starting point compiled from published, authoritative sources (manufacturer datasheets and well-documented maker practice) and cross-checked in a research-style review. The in-app Source label tells you where each recipe comes from. These numbers are NOT a guarantee of results. Heat-treat outcomes vary with your furnace, quenchant, blade geometry and process. Always verify on your own setup, follow proper safety practice for high temperatures and cryogenic media, and treat the app as a reference - not professional or metallurgical advice, and not a measurement instrument. The temper color chart in particular must never be used as a way to measure temperature or hardness. One-time purchase. No subscription. No account. Works 100% offline.

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10 NEW STEELS — your buy-once purchase just grew: • ApexUltra, CPM-M4, CPM-154, CPM S30V, M390 (=20CV/204P), Elmax, 440C, 5160, 26C3, 8670 • Every recipe sourced from manufacturer datasheets + Knife Steel Nerds testing, with the source shown on the recipe — same rules as always: no guesses, no extrapolation. NEW: Composition charts • Every steel now has a composition tab — C, Cr, V, Mo, W, Mn, Si, Ni, Nb, N at a glance, with the source listed. NEW: Home-screen widget • See your last recipe (steel, target HRC, austenitize & temper) right on your home screen. • A running soak or temper timer shows a live countdown in the widget. Also in this update • MagnaCut temper table re-verified against the official Crucible datasheet. • Data v2026.06 — 26 steels total, all offline, all yours forever. No subscription, no account. Found a number that looks off? Email us — data reports are fixed first.

Version 1.1

The developer, 毅 王, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Information

    Seller
    • 毅 王
    Size
    • 1.2 MB
    Category
    • Reference
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Yi Wang
  • Privacy Policy

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