Kalkulatorer

Engineering calculator — results require technical review before production use.

• Varmetilførsel / termiskHeat Input / Arc Energy

  Calculates arc energy (nominal heat input) and, optionally, net/effective heat input for an arc welding pass from voltage, current, and travel speed.

• Sammensetning / rustfrittCarbon Equivalent CE/Pcm

  Calculates the IIW Carbon Equivalent (CE) and Japanese Pcm from chemical composition, with a simple weldability indication for each.

• MaterialdokumentasjonMaterial Certificate Check

  Compares user-entered actual material certificate values (mechanical properties, Charpy, through-thickness reduction of area, chemical composition) against user-entered requirement values. Reports whether the actual values numerically meet the entered requirement — it does not look up or embed any standard's requirement tables.

• Sammensetning / rustfrittCr/Ni Equivalent (Standard & Duplex)

  Calculates standard stainless-steel Creq/Nieq and modified duplex Creq/Nieq from chemical composition. These are empirical equivalents only — this calculator does not plot a Schaeffler/DeLong diagram or predict final weld metal structure.

• Geometri / volum / masseDeposit Coefficient / Deposited Cross-Section

  Calculates deposited weld cross-section area (D) from a deposit coefficient (g) and nominal heat input (Q), where D = g × Q. Q can be entered directly or calculated from voltage, current, and travel speed. Process selection provides typical g guidance only — it never drives the calculation.

• Varmetilførsel / termiskΔt8/5 Cooling Time

  Calculates Δt8/5 (cooling time from 800°C to 500°C) via Rosenthal's formula — a 2D (thin-plate) form for plate thickness below 23 mm and a 3D (thick-plate) form at or above it, both driven by the effective heat input (η×Q). Effective heat input can be entered directly, or computed from a nominal heat input and an efficiency factor — never both, to avoid double-applying efficiency.

• Sammensetning / rustfrittEstimated Mixed Composition

  Estimates a mixed weld-metal composition, element by element, from a filler/additive composition, a base-metal composition, and an entered dilution percentage — supporting engineering review of dissimilar welding and cladding scenarios. Uses a simple linear weighted-average arithmetic model, not a source-stated metallurgical formula. It is not a real chemical analysis, and does not predict structure, cracking, corrosion resistance, or hardness.

• Sammensetning / rustfrittPREN / Pitting Resistance Equivalent

  Calculates the Pitting Resistance Equivalent Number (PREN = Cr + 3.3×Mo + 16×N) from chromium, molybdenum, and nitrogen content, and compares it against the source's stated PREN > 40 pitting-resistance indication. This is an arithmetic index only — not a corrosion test, material approval, seawater approval, or fitness-for-service assessment.

• Sammensetning / rustfrittSchaeffler Coordinate Helper

  Prepares a Creq/Nieq coordinate pair for manual Schaeffler-diagram review — either entered directly, or computed from composition using the standard Cr/Ni equivalent formulas already implemented as FR-004. This is a coordinate helper only: it does not classify a structure region, compute a ferrite number, or implement DeLong or WRC calculations.

• Sammensetning / rustfrittDilution Percentage / Grade of Dilution

  Calculates the arithmetic dilution percentage — Dilution (%) = weight of melted base metal / total weight of melted metal × 100 — from two entered mass values. This is an arithmetic calculation only: it does not decide whether a dilution value is acceptable, does not compute weld-metal composition, and does not perform any Schaeffler/DeLong/WRC classification.

• Varmetilførsel / termiskWPS Heat Input Range

  Calculates a minimum/maximum nominal (and, if an efficiency factor is supplied, effective) heat-input range from entered voltage, current, and travel-speed ranges — Q (kJ/mm) = (U x I) / (v x 1000), the same formula already implemented as FR-001. This is an arithmetic range calculation only: it does not approve a WPS/WPQR, does not check a standard qualification range, and does not predict HAZ hardness, cracking, toughness, corrosion, or mechanical properties.

• Geometri / volum / masseWeld Length from Deposited Mass

  Estimates weld length from a deposited (or consumable) mass, a weld cross-section area, and a material density, using this project's own arithmetic/geometry model — mass = density × volume, for a constant-cross-section weld. This is a geometric estimate only: it does not predict actual consumable usage exactly, does not calculate cost, does not calculate a deposition rate, does not derive a cross-section area from joint or bead geometry, and does not approve a WPS/PQR or a production run.

• Geometri / volum / masseFillet Weld Area / Throat Geometry

  Estimates a fillet weld's theoretical cross-section area (and, for equal-leg geometry, the leg/throat relationship) from idealized triangular geometry — a geometric estimate only. It does not measure a real weld, does not verify structural design, does not decide inspection or standard-compliance acceptance, and does not approve a WPS/PQR.

• Geometri / volum / masseWeld Volume / Weld Metal Mass Estimator

  Estimates theoretical weld volume from a cross-section area and a weld length, and — when a density is supplied — theoretical deposited weld metal mass. A theoretical geometry/arithmetic estimate only. It does not measure a real weld, does not estimate actual consumable usage or a purchase quantity, does not estimate cost, and does not decide inspection or standard-compliance acceptance or approve a WPS/PQR.