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Abrasion Resistant Plate – Rock Hard 400/450/500

Abrasion Resistant Plate – Rock Hard

Typical Chemical Composition (%)

Grade C Mn Si Cr Mo B
NM 400 ≤0.30 ≤1.70 ≤0.70 ≤1.50 ≤0.60 ≤0.005
NM 450 ≤0.30 ≤1.70 ≤0.70 ≤1.80 ≤0.60 ≤0.005
NM 500 ≤0.35 ≤1.70 ≤0.70 ≤2.00 ≤0.60 ≤0.005
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Abrasion Resistant Steel Plates – Rock Hard 400 / 450 / 500

High-performance abrasion-resistant steel plates, Rock Hard 400, 450, and 500, are designed to withstand wear and tear in harsh industrial settings. Compared to traditional steel, these plates greatly increase the service life of components and are perfect for applications involving continuous friction, impact, and wear. Rock Hard plates are ideal for industries including mining, earthmoving, construction, cement, and recycling because of their ideal design, which strikes a balance between hardness, toughness, and workability.

Grades and Their Benefits:

Grade Typical Hardness (HBW) Key Characteristics Applications
Rock Hard 400 ~400 HB Excellent abrasion resistance with good formability Liner plates, hoppers, buckets
Rock Hard 450 ~450 HB Enhanced wear resistance, high toughness Dump truck beds, chutes, screens
Rock Hard 500 ~500 HB Maximum wear life, suitable for the harshest environments Crusher parts, cutting edges, excavator blades

Salient Features:

  • Exceptional resistance to abrasive wear and surface damage

  • Uniform hardness distribution throughout the plate

  • High impact strength to handle heavy-duty operations

  • Reliable machinability and weldability

  • Optimized for cold forming and plasma/laser cutting

Mechanical Properties:

  • Hardness:

    • Rock Hard 400: 360–440 HBW

    • Rock Hard 450: 420–480 HBW

    • Rock Hard 500: 470–540 HBW

  • Yield Strength: ~1000–1400 MPa

  • Tensile Strength: ~1250–1800 MPa

  • Elongation: 8–14%

  • Density: ~7.85 g/cm³

Workability:

  • Weldability: Good, with proper preheating and low-hydrogen electrodes

  • Forming: Excellent cold formability, especially for Rock Hard 400 and 450

  • Machining: Use of carbide tools is recommended for high hardness grades

Size Range (Standard & Custom Orders):

  • Thickness: 6 mm – 100 mm

  • Width: Up to 2500 mm

  • Length: Up to 12000 mm

  • Custom cuts, drilled holes, and profiled shapes available on request

Equivalent Grades:

Rock Hard Grade Equivalent Steel
Rock Hard 400 Hardox 400, Abrex 400, NM 400, Xar 400
Rock Hard 450 Hardox 450, Abrex 450, NM 450, Xar 450
Rock Hard 500 Hardox 500, Abrex 500, NM 500, Xar 500

Applications:

  • Earthmoving and mining equipment

  • Cement and aggregate handling

  • Crusher liners and shredder components

  • Bulldozer blades, tippers, and dump trucks

  • Screening and conveying systems

  • Chutes, feeders, silos, and impact plates

Distribution – Pan India Reach:

We ensure fast and reliable delivery across:

  • Uttar Pradesh – Kanpur, Lucknow, Noida, Varanasi, Meerut

  • Rajasthan – Jaipur, Bhiwadi, Jodhpur, Udaipur, Kota

  • Haryana – Faridabad, Gurugram, Hisar, Panipat, Ambala

  • Other States – Gujarat, Maharashtra, Chhattisgarh, Tamil Nadu, Telangana, West Bengal, and more

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