the best price alloy steel 4Cr2NiMnMo plate

Specifications

alloy steel 4Cr2NiMnMo
1.rolled,forged,pre-hardened to 28-34HRC.
2.100% UT test.
3.stocks

P20+Ni / 1.2738 / 718 / 3Cr2MnNiMo  Plastic tool steel

 

P20+Ni / 1.2738 / 718 / 3Cr2MnNiMo plate

 

Chemical Composition (%):

 

Grade		C		Si		Mn		P		S		Cr		Mo		Ni
1.2738	0.35-0.45		0.20-0.40		1.30-1.60		≤0.030		≤0.030		1.80-2.10		0.15-0.25		0.90-1.20
3Cr2MnNiMo		0.32-0.40		0.20-0.40		1.10-1.50		≤0.030		≤0.030		1.70-2.00		0.25-0.40		0.85-1.15
718		0.32-0.40		0.20-0.40		1.10-1.50		≤0.030		≤0.030		1.70-2.00		0.25-0.40		0.85-1.15

 

Available sizes:

Plate: Thickness 16 – 300mm, width 60- 520mm

Delivery condition: EAF, Hot rolled, Black surface, Prehardened Hardness 28 – 34HRC

 

Properties:

Plastic mould steel with excellent polish ability properties, good wear resistance, contains 1 % Ni alloy in addition to 1.2311, because of the Ni addition there is no hardness decrease in the center of large sizes over 400 mm thickness, easy to machine, requiring no heat treatment, 280 - 325 HB hardened and tempered condition. Suitable for nitriding, welding, hard chrome plating, photo etching and flame hardening.

 

Applications:

Plastic injection moulds with high mirror surface requirements, large injection and compression moulds for plastic processing over 400 mm thickness such as bumpers, instrument panels, garbage containers, dashboards, waste bins, chairs, bottle crates, television cabinets etc., mould carrier frames for the plastic moulds, components for general mechanical engineering and tool manufacture, synthetic plastic molding dies, pressure casting frames, hydro forming tools, structural components, shafts, blow moulds, extrusion dies for thermoplastics.

 

Heat Treatment:

Annealing : 710 - 730 °C

Hardness after annealing : Max. 240 HB

Stress relieving : Approx. 600 °C

Hot forming : 1050 - 850 °C

Hardening : 870 - 890 °C

Quenching media : Oil, Salt bath, Vacuum

Hardness after quenching : 50 - 54 HRC

Hardness after tempering :

 

Tempering °C	100	200	300	400
HRC	52	51	49	46