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Uns Unified Numbering System

Reference data and engineering information about uns unified numbering system for miscellaneous applications.

unsunifiednumberingsystem

Overview

Engineering reference data for Uns Unified Numbering System in miscellaneous.

Key Formulas

Unit Conversion

y=x⋅ky = x \cdot k

Multiply by conversion factor.

Linear Interpolation

y=y1+(x−x1)(y2−y1)x2−x1y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}

Estimate between two known points.

Percentage

p=partwhole×100%p = \frac{\text{part}}{\text{whole}} \times 100\%

Part as fraction of whole.

Variables

Symbol Description Unit
xx Input value —
yy Output value —
kk Conversion factor —

UNS Series Identification

Understanding UNS: Not a Specification

A critical distinction of the UNS is that it is an identification system, not a specification. The UNS number itself does not dictate chemical composition, mechanical properties, or manufacturing processes. Instead, it provides a standardized way to reference a specific material that is defined by a separate specification (such as an ASTM, AMS, or SAE standard). This allows for clear communication and consistency across different industries and documentation.

Key Distinction

The UNS correlates and unifies existing numbering systems from organizations like ASTM and SAE into a single, consistent framework. For example, a material previously identified by an SAE number and an ASTM designation may be assigned a single, unique UNS number.

References