Tool Steel Plastic Mold Steel

Chemical Composition
 

	C	Si	Mn	P	S	Cr	Ni	Mo
Typical analysis	0.36	0.30	1.50	0.020	0.003	2.00	1.50	0.20
Chemical composition as per SEL	0.35– 0.45	0.20– 0.40	1.30– 1.60	≤  0.030	≤  0.030	1.80– 2.10	0.90– 1.20	0.15– 0.25

 

Register of European Steels (SEL)	~ 40 CrMnNiMo 8-6-4
DIN EN ISO 4957	~ 40 CrMnNiMo 8-6-4
AFNOR	~ 40 CMND 8
AISI	~ P 20 + Ni
BS	~ P 20 + Ni

Characteristics
Mould steel for thickness  600 mm (width upon request). Properties as for grade 2311 ISO-BM,
but with improved through-hardening.
Nitridable, hard chrome plateable, fl ame hardenable, polishable, grain-reliable as delivered.
In an extreme dimensional range, and where there is a requirement for

• Higher hardness and better through-hardenability
• Polishability > 320 grit
• Sensitive etch-graining designs (e.g. HNO3)
• Higher thermal conductivity

we recommend grade 2738mod.TS(HH).

Applications
Small and medium-sized injection moulds, press moulds and mould frames up to 600 mm thick.

Physical properties (reference values)

Thermal expansion coeffi cient (10–6/K)	20–100 °C 11.6	20–250 °C 12.8	20–500 °C 14.3
Thermal conductivity (W/mK)	20 °C 34.0	250 °C 33.5	500 °C 33.0
Young’s modulus (GPa)	20 °C 212	250 °C 197	500 °C 175