P20+S Steel | DIN1.2312 | 40CrMnMoS8-6 |AISI P20+S

P20+S steel is a plastic mould tool steel which has Cr-Mn-Mo as strengthening elements as per Germany standard. Compared with P20 steel,it has a little higher sulphur content, which offers better machineability,30% increase in milling speed and 300% increase in drilling speed can be expected.P20+S steel is generally supplied in hardened and tempered condition with tensile strength 880-1080 Mpa.

P20+S Steel Supply Form & Size & Tolerance

Supply Form	Size(mm)	Process	Tolerance
Round	Φ6-Φ100	Cold Drawn	Bright/Black	Best H11
	Φ16-Φ350	Hot Rolled	Black	-0/+1mm
			Peeled/ground	Best H11
	Φ90-Φ1000	Hot Forged	Black	-0/+5mm
			Rough Turned	-0/+3mm
Flat/Square/Block	Thickness :120-800	Hot Forged	Black	-0/+8mm
	Width:120-1500		Rough Machined	-0/+3mm

Remark:Tolerance can be customized as per requests

P20+S Steel Chemical Composition

Grade	C	Mn	P	S	Si	Cr	Mo
1.2312	0.35-0.45	1.4-1.6	≤ 0.03	0.05-0.1	0.3-0.5	1.8-2.0	0.15-0.25

P20+S Steel Relevant Standards

USA:P20+S

Germany:40CrMnMoS8-6

France: 40CMD8S

P20+S Steel Physical Property

Density, g/cm3	7.85
Specific heat J/kg·K	470
Thermal expansion coefficient 10 ^-6m/(m·K)	20-100°C	20-200°C	20-300°C
Annealed	12.5	13.4	13.9
Tempered	12.3	13	13.7
Thermal conductivity W/(m · K)	100°C	200°C	300°C
Annealed	40.2	40.3	39
Tempered	39.8	40.4	39

P20+S Steel Mechanical Property

Mechanical Property at Quenched and Tempered condition
Tensile Strength	Yield Strength	Elongation	Reduction of Area	Impact	Hardness
960Mpa	850Mpa	10%	45%	20J	300HB

P20+S Steel Forging DIN1.2312

DIN1.2312 steel forging temperature:850 – 1100°C ,cooling as slowly as possible in sand after forged.

P20+S Steel Heat Treatment

• Normalizing:  850 – 900°C,Cooling in air
• Annealing:700 – 740°C,Cooling in furnace,Hardness:max 235HB
• Hardening:840 – 880°C,water or oil quench
• Tempering:640 – 680°C,Cooling in air

Chart of tempering values depending on the hardness
°C	100	200	300	400	500	600	700
HRC	51	50	48	46	42	36	28
R ， N/mm2	1730	1670	1570	1480	1330	1140	920

 P20+S Steel Application

P20+S steel is used for the production of moulds where improved machinability is required,and for plastics processing and moulds for pressure die casting.Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds,machine construction, jigs, base plates, assembling parts, moulding frames, plastic moulds, plastic processing, die casting moulds, hydroforming tools, recipient sleeves, folding bars, tool holders,etc.