Stainless Steel Specifications / ISO Tolerances
AUSTENITIC NON-MAGNETIC GRADES
British Standard or Common Name |
Characteristics |
304: S11 (1.4301) |
Good for welding, bending and corrosion resistance |
303: S31 (1.4305) |
Free machining grade welding and bending, fair only. 304 offers better corrosion resistance |
316: S11 (1.401) |
Food and Marine quality, high corrosion resistance and excellent welding |
321: S31 (1.4541) |
Excellent welding, good for bending, high heat resistance |
MARTENSITIC MAGNETIC GRADES
British Standard or common Name |
Characteristics |
410: S21 (1.4006) |
General purpose grade |
416: S21 (1.4005) |
The addition of sulphur makes for excellent machining |
431: S29 (1.4057) |
Due to the high chromium and nickel content better corrosion resistance |
Duplex GRADES
British Standard or common Name |
Characteristics |
Duplex F51 : S31803 |
Duplex stainless steels are extremely corrosion resistant, work hardenable alloys |
Duplex F55: S32760 |
Duplex stainless steels are extremely corrosion resistant, work hardenable alloys |
nickel based & Super Alloys
British Standard or common Name |
Characteristics |
Nitronic 60 : S21800 |
Provides excellent high temperature oxidation resistance and low temperature impact |
Monel K500 : 2.4375 |
A precipitation-hardenable nickel-copper alloy that combines high strength, corrosion resistance and non-magnetic properties |
Inconel 625 : 2.4865 |
Has excellent fatigue strength and stress corrosion cracking resistance |
ISO Tolerances
ISO Tolerance h - j - k tables |
h: Minus Tolerance |
e.g. 60mm Dia |
h10 = +0.000 to -0.120mm |
j: Split Tolerance |
e.g. 60mm Dia |
j10 = +0.060 to -0.060mm |
k: Plus Tolerance |
e.g. 60mm Dia |
k10 = +0.120 to -0.000mm |