P20 Plastic Mold Steel (DIN 1.2311 / AISI P20 / GB 3Cr2Mo)

Overview:

P20 Mold Steel is a low-alloy, versatile tool steel primarily supplied in a pre-hardened condition (approx. 28–34 HRC). Known for its good toughness, excellent machinability, and uniform hardness, P20 is widely used in the plastic injection Mold industry and for die-casting dies, particularly for zinc.

P20 offers consistent performance across large sections and is compatible with polishing and surface treatments, making it ideal for complex and high-finish Mold applications.

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Key Features of P20 Steel:

• Pre-hardened tool steel with uniform hardness distribution

• Excellent machinability and mirror polish finish capability

• Good dimensional stability with minimal distortion

• Outstanding weldability and nitriding response

• Ideal for large plastic Molds and low melting point metal die casting

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Equivalent Grades:

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Mechanical & Physical Properties:

• Hardness (Pre-Hardened): 28 – 34 HRC

• Density: 7.86 g/cm³ (7861 kg/m³)

• Modulus of Elasticity: 207 GPa (30 × 10⁶ psi)

• Thermal Conductivity: 41.5 W/m·K (24 Btu/ft/hr/°F)

• Machinability: 60–65% of 1% carbon steel

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Heat Treatment Parameters:

• Hardening Temp: 763 °C (Critical)

• Preheating: Up to 621–677 °C at a max rate of 222 °C/hr

• Quenching: Gas pressure or interrupted oil quench to 66–51 °C

• Tempering: At 482–593 °C for desired hardness between 28–37 HRC

• No further hardening is needed in most cases as the steel is delivered pre-hardened

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Variants:

• P20+Ni (1.2738): High-hardness variant for larger Molds requiring increased toughness and polishability

• P20+S: Improved machinability variant due to added sulfur

• P20+Ni+HH: High-hardness version with better surface resistance and extended tooling life

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Applications:

P20 steel is widely used in:

• Plastic injection Molds

• Blow Molds and Preform Molds (PET)

• Die holders, bolsters, and support plates

• Mold bases for thermoplastics and thermosetting materials

• Pressure die-casting Molds for low-melting alloys like zinc

• Hydraulic forming dies, rails, shafts, and wear strips

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Other Available Grades:

C45, EN8, EN9, EN19, EN24, EN31, EN36C, EN41B, EN47, EN353, IS2062, 42CrMo4, HCHCR, OHNS, D2, D3, H11, H13, M2, M35, M42, M48, 1.2714, SKD-11, P20, P20+S, P20+Ni, P20+Ni+HH, SAE 4140, SAE 4340, SAE 8620, 16MnCr5, 20MnCr5, C35, C40, C50, C60, CK45, 40C8, 45C8, 55C8, C55Mn75, SAE 52100, S40C, S355J2G3.

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We Supply PAN-India:

Uttar Pradesh:
Kanpur, Lucknow, Ghaziabad, Agra, Varanasi, Meerut, Noida, Gorakhpur, and more.

Rajasthan:
Jaipur, Jodhpur, Kota, Bikaner, Udaipur, Ajmer, Alwar, Bhilwara, and more.

Haryana:
Faridabad, Gurugram, Panipat, Hisar, Karnal, Rohtak, Ambala, Sonipat, and other cities.