YTJ80

Chemical Composition	C	Si	Mn	P	S	Mo	Ni	Cu	Al
(Typical analysis %)	0.15	0.22	1.80	0.011	0.004	0.30	2.95	1.00	0.90

Property:

YTJ80 is a precipitation or age-hardened mold steel with a uniform through hardness of approximately 40 HRC.
Good uniformity of hardness, HRC (+/-) 1-1.5
Ageing state can be machine worked, and the layer of electro erosion machining can be removed easily.
Stress relieving not required after machining.
Good polish. Through Electro Slag Remelting (ESR), molten steel of YTJ80 is pure, and the composition of
YTR80 is well-distributed which gives YTJ80 better minute surface.
Good weldability.

Delicate and complicated plastic moulds.
Specular (transparent) lens molds.
Plastic mould to manufacture delicate ablation cross-hatching (dermatoglyph) car garnish, office supplies, etc.