1.2312 P20+S 3Cr2Mo+S Precision Plastic Mould Die Alloy Tool Steel

• Type: Steel Plate
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy Steel
• Technique: Hot Rolled
• Shape: Plate
• Surface Treatment: Black surface
• Model NO.: 1.2312 P20+S 3Cr2Mo+S
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel, Mold Steel, Plastic mould steel
• Application: Die Steel Bar
• Thickness: 20-500MM
• Width: 155-2200mm
• Technology: hot rolled/forged
• Heat Treatment: Q+T
• Surface: Black
• Production process: EF/EAF+LF+VD/ESR
• Payment term: TT/LC
• Delivery Time: 15-20days
• Transport Package: Standard/Customized
• Specification: standard/customized
• Trademark: Baosteel
• Origin: China
• HS Code: 7225401000
• Production Capacity: 1000 Tons/ Month

Product Description

1.2312 P20+S 3Cr2Mo+S Precision Plastic Mould Die Alloy Tool Steel

1.2312/P20+S steel is ideally suited for the production of moulds where improved machinability is required. Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds. The versatility of this plastic mould tool steel with its high tensile characteristics enables uses for a variety of other applications such as shafts and wear strips.

1. Grade

W.Nr	DIN	AFNOR	AISI/SAE	GB
1.2312	X40CrMnMoS8-6	(40CMD8S)	P20+S	4Cr2MnMo

2. Chemical composition (%)

C	Mn	Si	Cr	Mo	S	P
0.35-0.45	1.40-1.60	0.30-0.50	1.80-2.10	0.15-0.25	0.05-0.10	≤0.030

3. Available size: 

Grade	Plate	Round bar
	Thick. (mm)	Dia. (mm)
1.2312	20-500mm	16-200mm

4. Phase transition temperature

Ac1	740°C
Ms	310°C

5. The hardness of delivery

Prehardened and tempered

HB278-325(950-1100N/mm²)

6. Heat treatment

Annealing	1)Heated to720-750°C,Two to four hours heat preservation, 2)Furnace cooling
Stress relief	1)Heated to560-650°C and then two to four hours heat preservation 2)Furnace cooling or air cooling
Pre hardened	1)Preheat to 600-650°C 2)Heated to hardening temperature 840-840°C and heat preservation 3)Oil cooling 4)Hardness:HRC51
Drawing temper	1)Immediately after quenching 2)When the 580-650°C,with the 1/inch to heat preservation

7. Application:
Mainly used for the degree of thefamily which do not require extreme large plastic moulds, Used as a low melting point of die holder , mould base, etc.

8. Product photos