O.H.N.S.

OHNS steel is a non - shrinkage steel. This term refers to steels which show little change in volume from the annealed state when hardened and tempered at low temperatures. Such steels are required tor master tools, gauges and dies which must not change size when hardened after machining in the annealed condition.

Chemistry of OHNS

C

Si

Mn

P

S

Cr

V

W

0.9

0.15

1

0.035

0.035

0.5

0.05

0.5

1.05

0.35

1.2

MAX

MAX

0.70

0.15

0.7

Applications of OHNS:

It is to be considered as die steel. It is used for manufacturing of blanking and stamping dies, rotary shear blades, thread outing tools, milling cutters, measuring tools, gauging tools, wood working tools, reamers, etc.

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