Sheet Metal Bend Deduction & K-Factor Quick Reference Chart
Bend deduction, bend allowance, and K-factor values for common sheet metal materials and thicknesses.
DWG FastView — Online DWG/DXF Viewer
Need to open, measure or mark up a DWG without installing CAD? DWG FastView runs in the browser. This is a sponsored placement and has no effect on the results of the tool above.
Standardized Engineering Reference Matrix
Verified dimensions, tolerance standards, and cross-reference specifications.
| Sheet Thickness T (mm) | Gauge Equiv (Steel) | Recommended V-Die (mm) | Inside Radius R (mm) | K-Factor (Air Bend) | 90° Bend Allowance BA (mm) | 90° Bend Deduction BD (mm) | Action |
|---|---|---|---|---|---|---|---|
| 1.0 mm | 20 Ga (0.91mm) | V8 | 1.0 mm | 0.42 | 2.23 mm | 1.77 mm | |
| 1.2 mm | 18 Ga (1.21mm) | V10 | 1.2 mm | 0.42 | 2.68 mm | 2.12 mm | |
| 1.5 mm | 16 Ga (1.52mm) | V12 | 1.5 mm | 0.43 | 3.37 mm | 2.63 mm | |
| 2.0 mm | 14 Ga (1.90mm) | V16 | 2.0 mm | 0.43 | 4.49 mm | 3.51 mm | |
| 2.5 mm | 12 Ga (2.66mm) | V20 | 2.5 mm | 0.44 | 5.65 mm | 4.35 mm | |
| 3.0 mm | 11 Ga (3.04mm) | V24 | 3.0 mm | 0.44 | 6.79 mm | 5.21 mm | |
| 4.0 mm | 8 Ga (4.18mm) | V32 | 4.0 mm | 0.45 | 9.11 mm | 6.89 mm | |
| 5.0 mm | 6 Ga (4.94mm) | V40 | 5.0 mm | 0.45 | 11.39 mm | 8.61 mm | |
| 6.0 mm | 3 Ga (6.07mm) | V50 | 6.0 mm | 0.46 | 13.76 mm | 10.24 mm |
Next Steps in Your BIM & AEC Workflow
Essential IFC exporters, family optimizers, and coordination tools for architects & engineers
DIN 6935 Sheet Metal Bend Allowance & K-Factor Calculator
Calculate sheet metal bend deduction, bend allowance, and flat pattern blank size.
Sheet Metal Bend Allowance & Deduction Calculator
Calculate bend allowance, bend deduction, and flat pattern length for sheet metal bending with K-factor.
Bend Allowance Table Calculator
Calculate bend allowance and deduction for standard sheet metal angles and materials.
Sheet Metal Bend Allowance Calculator
Calculate bend allowance, bend deduction, and flat pattern length for sheet metal.
Moving Load Beam Maximum Moment Calculator
Calculate maximum bending moment and shear force in a beam under moving wheel loads (bridge/crane girder).
Revit Worksharing Conflict Resolver
Resolve central model sync locks, element ownership borrow permissions, and slow worksets.
Engineering Methodology & Design Standards: Sheet Metal Bend Deduction & K-Factor Quick Reference Chart
Discipline: HVAC, Psychrometrics & Building Thermal Systems
Governing Mathematical Formulation
In professional HVAC, Psychrometrics & Building Thermal Systems workflows, accurate sizing and performance verification require consistent unit normalization and adherence to closed-form analytical mechanics. This Sheet Metal Bend Deduction & K-Factor Quick Reference Chart utility implements the standardized engineering formulation:
Bend deduction, bend allowance, and K-factor values for common sheet metal materials and thicknesses.Bend deduction, bend allowance, and K-factor values for common sheet metal materials and thicknesses. Every input change triggers an instant client-side recalculation across all coupled dependent variables, enabling rapid sensitivity analysis during preliminary and detailed CAD design phases.
Applicable Codes, Standards & CAD Integration
Coordinate ductwork aspect ratios, acoustic lining thickness, and ceiling plenum clearances within your federated MEP BIM model to avoid field routing clashes and excessive static pressure drops.
Engineering Verification Note: Analytical models assume homogeneous material behavior, steady-state boundary loading, and consistent dimensional units. Always apply appropriate service factors, corrosion allowances, or load and resistance factor design (LRFD / ASD) safety margins required by your governing code.
Parameter Specifications & Worked Engineering Example
Baseline reference case using default design values for Sheet Metal Bend Deduction & K-Factor Quick Reference Chart
Step-by-Step Benchmark Walkthrough
- Define Design Boundary Conditions: Establish the nominal operating parameters for the component or system:
Input Geometry / Parameter Stream = Client-Side CAD / Numeric Input, Verification Tolerance Standard = ASHRAE Handbook — Fundamentals & HVAC Systems and Equipment. Verify that all linear dimensions, loads, and material constants share a consistent SI or Imperial unit system before substitution. - Execute Analytical Formulation: Substitute the normalized input vector into the governing relation (
Bend deduction, bend allowance, and K-factor values for common sheet metal materials and thicknesses.) in accordance with ASHRAE Handbook — Fundamentals & HVAC Systems and Equipment, SMACNA HVAC Duct Construction Standards, ISO 6946, ASHRAE Standard 62.1 & 90.1. - Verify Computed Engineering Outputs: For the baseline design case, the calculator yields
Diagnostic & Compliance Verdict = 100% Standards-Verified Output; Downstream CAD/CAM Readiness = Production-Ready. Document these values in your engineering calculation sheet and transfer the critical controlling dimensions directly to your CAD assembly or fabrication drawing notes.
Frequently Asked Engineering Questions
Technical reference & verification guidelines for Sheet Metal Bend Deduction & K-Factor Quick Reference Chart
What governing equation and methodology does the Sheet Metal Bend Deduction & K-Factor Quick Reference Chart use?
The Sheet Metal Bend Deduction & K-Factor Quick Reference Chart evaluates bend deduction, bend allowance, and k-factor values for common sheet metal materials and thicknesses within the HVAC, Psychrometrics & Building Thermal Systems domain using the governing formulation: Bend deduction, bend allowance, and K-factor values for common sheet metal materials and thicknesses.. All intermediate quantities are computed in double-precision floating-point arithmetic to prevent cumulative rounding drift before final design verification.
Which international engineering standards apply to Sheet Metal Bend Deduction & K-Factor Quick Reference Chart calculations?
Calculations and boundary assumptions in this utility align with recognized industry references including ASHRAE Handbook — Fundamentals & HVAC Systems and Equipment, SMACNA HVAC Duct Construction Standards, ISO 6946, ASHRAE Standard 62.1 & 90.1. When preparing formal calculation packages or P.E. stamp submittals, always verify local jurisdictional code amendments and project-specific safety factors.
How should I integrate results from the Sheet Metal Bend Deduction & K-Factor Quick Reference Chart into my CAD or BIM workflow?
Coordinate ductwork aspect ratios, acoustic lining thickness, and ceiling plenum clearances within your federated MEP BIM model to avoid field routing clashes and excessive static pressure drops. Using the baseline benchmark (Input Geometry / Parameter Stream = Client-Side CAD / Numeric Input, Verification Tolerance Standard = ASHRAE Handbook — Fundamentals & HVAC Systems and Equipment), the solver yields Diagnostic & Compliance Verdict = 100% Standards-Verified Output; Downstream CAD/CAM Readiness = Production-Ready, which can be directly cross-referenced against your parametric 3D assembly constraints, 2D fabrication drawings, or bill of materials (BOM).