din 1.2311 plastic mould steel p20 flat bar

Specifications

din 1.2311 plastic mould steel p20 flat bar:
1. UT standard: SEP 1921-84 Class C/c
2. Payment terms:TT/LC at sight

din 1.2311 plastic mould steel p20 flat bar detailed products description: 

 

 

1) Delivery condition:

 

 

Hot rolled&forging,black surface,

 

Hardened&Tempering,Hardness:28-34HRC.

 

 

2)Chemical composition:

 

 

 

Comparable Standards:                                                                                                       

 

AISI/SAE	DIN	W.Nr.	AFNOR	JIS	BS	SIAU	GB,YB
P20	40CrMnMo7	1.2311	35CMD7	HPM7	/	2311	3Cr2Mo

 

 

 

 Chemical Analysis (%):                                                                                                         

 

C	Mn	Si	Cr	Ni	Mo	P	S
0.35-0.45	1.30-1.60	0.20-0.40	1.80-2.10	-	0.15-0.25	≤0.03	≤0.03

 

 

 

  

 

3).Specification:

 

Thickness:20/25/30/35...700mm;Width:155/205/210/...2200mm;Length:2000~5800mm

 

 

 

4).Application:

 

Used for various large-sized or medium-sized precision plastic mould and low melting point alloy parts,like tim,zinc and Lead alloy casting mould.

 

 

Heat treatment                                                                                                       

 

 

Annealing:

Heat to 720÷750°Cfor 2÷4 h furnace cool.

 

 

 

Stress relieving:

 

Up to 560÷600°C, hold for 2÷4h; furnace or still air cooling.

 

 

 

Hardening:

 

Preheating to 600÷650°C;

 

-   Heat to hardening temperature to 840÷870°C and hold at temperature.

 

-   Cooling in oil

 

Hardness after hardening: HRC 51

 

 

 

Tempering:

 

To be carried out after hardening in the range 580÷650°C for 25mm of thickness minimum 2h.

 

 

 

 

5) Payment terms:

 

30% deposit, balance against L/C at sight or T/T.