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GSTIN - 07AESPG2194K1Z1

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Plastic Mold Steel -P20+Ni (1.2738)

Chemical Composition (%):

Element Composition (%)
C (Carbon) 0.35–0.45
Mn (Manganese) 1.30–1.60
Si (Silicon) 0.20–0.40
Cr (Chromium) 1.80–2.10
Mo (Molybdenum) 0.15–0.25
Ni (Nickel) 0.90–1.20
P (Phosphorus) (Max) ≤0.030
S (Sulfur) (Max) ≤0.030
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Plastic Mold Steel – Grade 1.2738 / P20+Ni / AISI P20+Ni

Overview:

Grade 1.2738 is a premium plastic mold steel designed specifically for large, high-performance plastic injection molds. It is equivalent to AISI P20+Ni, offering improved toughness, uniform hardness, and excellent machinability. The addition of Nickel, Chromium, and Molybdenum enhances its hardness, toughness, and dimensional stability, making it a preferred choice in the plastic mold industry.

This steel is supplied in a pre-hardened, quenched and tempered condition, typically at a hardness of 280–320 BHN (32–36 HRC), ready for immediate use without the need for further heat treatment.

Key Characteristics:

  • Uniform hardness across large cross-sections

  • Good machinability and polishability

  • Suitable for texturing and surface finishing

  • Moderate corrosion resistance

  • Can be nitrided and chrome-plated

  • Fair weldability with proper preheating and post-weld tempering

Physical & Mechanical Properties:

Property Value
Modulus of Elasticity 205 × 10³ N/mm²
Density 7.80 g/cm³
Thermal Conductivity (100 °C) 33.5 W/m·K
Average Thermal Conductivity 29.0 W/m·K
Specific Heat Capacity 0.46 J/g·K
Tensile Strength ≈ 1080 N/mm²
Delivered Hardness 32–36 HRC
High Hardness Variant Up to 38–40 HRC

Heat Treatment (Reference Only):

Note: Grade 1.2738 is usually delivered in a pre-hardened condition. Additional heat treatment is not required unless specified.

  • Forging Temperature: 1050–850 °C

  • Soft Annealing: 710–740 °C

  • Quenching: 840–870 °C (if required)

  • Tempering (Post-Weld or Stress Relief): As per application

Equivalent Grades:

Standard Grade
DIN 1.2738
AISI P20+Ni
UNS 40CrMnNiMo8-6-4

Applications:

  • Large and medium-sized plastic injection molds

  • Die-casting dies and compression molds

  • Mold bases, bolster plates, and press holders

  • Dies for household product manufacturing

  • High-finish plastic molding components

  • Forging dies and drop hammer blocks

  • Hydroforming tools and mold inserts

  • Chrome-plated or nitrided molds for longer tool life

Suitable for tools requiring high polishability, wear resistance, and excellent dimensional stability across heavy-duty, repetitive operations.

Available Forms:

  • Round Bars

  • Flat Bars

  • Blocks

  • Plates

  • Custom Sizes as per Drawing

Other Grades Available:

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.

We Deliver Across PAN India

Uttar Pradesh:

Kanpur, Lucknow, Noida, Ghaziabad, Agra, Meerut, Varanasi, Gorakhpur, Bareilly, Moradabad, Aligarh, Saharanpur, Prayagraj, Jhansi, Muzaffarnagar, Mathura, Ayodhya, and many more.

Rajasthan:

Jaipur, Jodhpur, Kota, Udaipur, Bhiwadi, Ajmer, Bikaner, Bhilwara, Alwar, Sri Ganganagar, Sikar, Hanumangarh, Bharatpur, Dungarpur, Churu, and other cities.

Haryana:

Gurgaon, Faridabad, Panipat, Hisar, Karnal, Rohtak, Sonipat, Yamunanagar, Ambala, Rewari, Bahadurgarh, Sirsa, Bhiwani, Kaithal, and more.

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