Balance Weights, Calibration Weight, ASTM UltraClass, Certificate, Sets, Ohaus

ASTM Calibration Weight Sets
Applications
Use as a primary reference for calibrating other mass standards and use for traceability between national mass standards and ASTM Class 1 weights and lower. This class is appropriate for calibrating high-precision balances with readability as low as 0.01mg. The two-piece construction has design features that include weights 50kg through 1g are cylindrical with handling knob; the weights 500mg and below are flat with one end turned up for easy handling.

B183-1
Weights ≥2kg are 316 Stainless Steel; Weights below 2kg are Troemner Alloy; Weights <2kg are Troemner Alloy 8.
B183-2
Weights 500mg to 5mg are 304 Stainless Steel; Weights 5mg through 500mg are 304 Stainless Steel; Weights below 5mg are 3003-H14 Aluminum; Weights below 5mg are Aluminum.