import type { HardnessInput, HardnessResult } from './types.js';
interface ConversionRow {
    HRC: number;
    HB: number;
    HV: number;
    Shore: number;
}
export declare const CONVERSION_TABLE: ConversionRow[];
/**
 * Convert a hardness value from one scale to all scales using
 * linear interpolation on the conversion table.
 *
 * Inputs outside the table (e.g. HRC below 20 or above 68) are clamped to the boundary
 * row and disclosed via `outOfTableRange: true` — the returned values are then a boundary
 * approximation, not a conversion of the input. Exact boundary hits are table hits and
 * are not flagged. Interpolation within the table is the method's intended behavior.
 */
export declare function hardness(input: HardnessInput): HardnessResult;
export {};
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