P-20+NI 1.2738 & 1.2738 HH Plastic moulding steel

Specification

(1.2738) Delivered pre hardened ready for use at 280-325 H.B. With added 1%Nickel to ensure consistent hardness through large sections. Easy to polish and readily machinable. Suitable for hard chrome plating and for nitriding.

Application

Used for quality for pressing and injection molding tools. If the section exceeds 400mm Having an additional nickel content of 1% increases the hardness. 1.2738 is used in large plastic molds such as container molds, injection molds, deep engraved rubber molds, etc. 1.2738 is a pre-hardened mold steel, which also exhibits high core strength1.2738 is a micro-alloyed, vacuum-degassed steel with the following excellent characteristics: good machinability, excellent polishability, good texture properties.

Chemical Analysis %

C	Mn	Cr	Si	Mo	P	S	NI
0.35-0.45	1.30-1.60	1.80-2.10	0.20-0.40	0.15-0.25	0.030 Max	0.030 Max	0.90-1.20

Delivery condition
Hardened and Tempered 280- 325 HB
1.2738 High Hard 360- 400 HB

Soft Annealing	Cooling	Hardness	Hardening	Quenching	Hardness after quenching HRC
710-740°C	Furnace	235 HB	840-870°C	Oil or thermal bath cooling, 180-220°c	52

Tempering °C

Tempering°C	100	200	300	400	500	600	700
HRC	52	50	48	46	42	39	28