304 Stainless Steel: Datum FG

NEW Datum Fine Grain is a precision cold rolled full hard stainless steel with fine grain structure and superior stress relief annealing properties that is specifically designed for high density patterns and to remain flat post processing when laser cut or etched. The micro grain structure of 2 to 3 microns ensures super smooth aperture walls post cutting. The enhanced annealing properties ensure flatness is maintained following both laser cutting, step etching / milling and through etching.

The NEW Datum FG is produced with the tightest thickness tolerance on the market, the same as our Datum PhD, and is available in gauges from 0.08mm to 0.25mm from stock and widths up to 610mm and any sheet length or coil.

Datum FG is perfectly suited to laser cutting and chemical etching. The fine grain structure of this material ensures that cut edges are clean and precise, with a wall finish that is smoother than standard 304 Stainless material.

The below images show the effect of different annealing process when the material is half etched.


304 Stainless Steel: Datum FG
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Datum Fine Grain
Datum Fine Grain
Datum Fine Grain 304 Stainless Steel
304 Stainless Steel
301 Stainless Steel


Corrosion Resistance
304 has excellent corrosion resistance in a wide range of atmospheric environments and when in contact with different corrosive substances.
Heat Resistance
304 has good resistance to oxidation and can be used at temperatures up to 870°C
304 has superior machinability giving higher machining rates and lower tool wear in many operations. 304 stainless can be machined, folded or roll-formed into a variety of components for applications.
Datum 304 stainless steel has excellent forming and welding characteristics both with and without fillers. Post-weld annealing is not required when welding thin sections.
Hardness Range
1130 N/mm²


Datum FG 304 SS

Carbon (C) 0.08
Manganese (Mn) 2.0
Silicon (Si) 1.00
Phosphorous (P) 0.045
Sulphur (S) 0.030
Chromium (Cr) 18.00 - 20.00
Nickel (Ni) 8.00 - 10.50
Iron (Fe) Balance
Nitrogen (N) 0.10


Visit Datum’s Support Library for a complete list of resources.


Datum Fine Grain (FG) Datasheet

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