Hello There!

Golden Steel Material is a premier ISO-certified stockist based in Al Jubail. We supply high-performance pipes, fittings, valves, and flanges to the Oil & Gas and Industrial sectors across Saudi Arabia and the GCC.

Contact Us

Reach Us

Welcome to Golden Steel Material Let’s Talk

ROCKHARD 400/450/500 Plates

ROCKHARD 400/450/500 Plates
Material Origin: AM/NS India (Formerly Essar Steel)
Hardness Range: 400, 450, & 500 HBW (Brinell)
Production Method: Direct Quenched & Tempered
Steel Grade: Impact & Abrasion Resistant Steel
Thickness Range: 5 mm to 80 mm
Key Property: High Toughness for Shock Load Protection
Operational Edge: Extended Life in High-Wear Zones
Core Applications: Mining Buckets, Chutes, Liners, Dumpers
goldenislands.com.sa

ROCKHARD Wear Resistant Steel is a premium abrasion-resistant brand manufactured by AM/NS India (ArcelorMittal Nippon Steel India). Specifically developed to handle the most demanding wear conditions, ROCKHARD 400, 450, and 500 plates offer a strategic solution for industries looking to balance high surface hardness with structural reliability. These plates are produced using state-of-the-art direct quenching technology, which results in a highly uniform metallurgical structure. This ensures that the wear-resistant properties are consistent throughout the entire thickness of the plate, providing dependable protection even as the material is gradually consumed during operation.

The technical superiority of ROCKHARD 400/450/500 lies in its exceptional impact toughness, which prevents the steel from cracking or failing under the sudden shock loads common in mining and heavy construction. Designed for high performance in Indian industrial environments, ROCKHARD plates feature a optimized chemical composition that allows for effortless welding and cold bending. By switching to ROCKHARD, manufacturers can design lighter, more efficient equipment such as excavator buckets, tipper bodies, and mineral processing chutes, ultimately leading to significant savings in fuel, maintenance costs, and operational downtime.



ROCKHARD 400/450/500 Plates Features

  • » Advanced AM/NS Technology: Produced by ArcelorMittal Nippon Steel India, ROCKHARD utilizes global steelmaking expertise to provide world-class abrasion resistance for the domestic market.
  • » Superior Impact Toughness: Engineered with a refined grain structure that excels in absorbing energy from high-velocity impacts, preventing brittle failure and surface cracking in harsh environments.
  • » Optimal Through-Hardening: Every plate is direct-quenched to ensure the Brinell hardness is maintained deep into the core, offering a consistent wear rate throughout the plate's entire lifespan.
  • » High Strength-to-Weight Efficiency: The exceptional mechanical properties allow for thinner plate designs, enabling manufacturers to build lighter equipment with increased payload capacity.
  • » Excellent Fabrication Workability: Designed with a low carbon equivalent, ROCKHARD plates offer reliable weldability and can be cold-formed or bent with high precision and minimal risk of cracking.
  • » Clean Surface Finish: Delivered shot-blasted and primed, these plates ensure efficient cutting (laser, plasma, or gas) and provide a superior base for high-quality industrial painting.
  • » Reduced Maintenance Costs: By resisting both sliding and scraping abrasion, ROCKHARD significantly extends the time between liner replacements and machine overhauls.
  • » Strict Dimensional Tolerances: Manufactured to tight thickness and flatness standards, ensuring a perfect fit during assembly and reducing the time spent on workshop adjustments.

ROCKHARD 400/450/500 Plates Specification

Brand & Origin

  • Manufacturer: AM/NS India
  • Brand: ROCKHARD
  • Legacy: ArcelorMittal Nippon Steel
  • Process: Direct Quenched & Tempered

Hardness Levels

  • Rockhard 400: 370 – 430 HBW
  • Rockhard 450: 420 – 480 HBW
  • Rockhard 500: 470 – 540 HBW
  • Type: Full Through-hardened

Mechanical Data

  • Yield Strength: ~1000 - 1200 MPa
  • Tensile Strength: ~1250 - 1500 MPa
  • Impact (450): 30J (Min) at -20°C
  • Toughness: High Energy Absorption

Dimensions

  • Thickness: 5 mm to 80 mm
  • Width: Up to 2500 mm
  • Length: Up to 12000 mm
  • Flatness: Precision Leveled

Workability

  • Welding: Superior (Low Carbon)
  • Bending: High Formability
  • Cutting: Laser/Plasma Compatible
  • Surface: Clean, Primed Finish

Certifications

  • MTC: EN 10204 3.1
  • Testing: UT tested / Impact tested
  • Standard: ASTM A514 / Equivalent
  • Verification: Full Heat Traceability

ROCKHARD 400/450/500 Plates Detailed Specifications

Property Specification
Item Abrasion Resistant Plate
Material ROCKHARD 400, SUMIHARD, BRINAR, DUROSTAT, DILLIDUR, JFE EVERHARD.
Thickness 3 - 200mm
Width 500 - 3000mm
Length 1000 - 12000mm
Heat Treatment N, Q+T
Surface Paint EP, PE, HDP, SMP, PVDF

ROCKHARD 400/450/500 Plates Chemical Composition

Element (Max %) Rockhard 400 Rockhard 450 Rockhard 500
Carbon (C) 0.20 0.22 0.30
Silicon (Si) 0.50 0.50 0.50
Manganese (Mn) 1.60 1.60 1.60
Phosphorus (P) 0.025 0.025 0.025
Sulfur (S) 0.010 0.010 0.010
Chromium (Cr) 1.00 1.20 1.50
Nickel (Ni) 0.50 0.70 1.00
Molybdenum (Mo) 0.50 0.50 0.60
Boron (B) 0.005 0.005 0.005

ROCKHARD 400/450/500 Plates Mechanical Properties

Property Rockhard 400 Rockhard 450 Rockhard 500
Hardness (HBW) 370 – 430 420 – 480 470 – 540
Yield Strength (MPa) ~ 1000 ~ 1100 ~ 1200
Tensile Strength (MPa) ~ 1250 ~ 1400 ~ 1550
Elongation (A5 %) 12 11 10
Impact Energy (at -20°C) 35 J 30 J 25 J
Thickness Range 5.0 – 80 mm 5.0 – 80 mm 6.0 – 50 mm

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA
Global Footprint

We Supply To 60+ Countries

UAE UAE
Saudi Arabia Saudi Arabia
USA USA
UK UK
Germany Germany
India India
Italy Italy
France France
Spain Spain
Brazil Brazil
South Africa South Africa
Russia Russia
Japan Japan
South Korea S. Korea
Malaysia Malaysia
Singapore Singapore
Netherlands Netherlands
Turkey Turkey
UAE UAE
Saudi Arabia Saudi Arabia
USA USA
UK UK
Germany Germany
India India
Italy Italy
France France
Spain Spain
Brazil Brazil
South Africa South Africa
Russia Russia
Japan Japan
South Korea S. Korea
Malaysia Malaysia
Singapore Singapore
Netherlands Netherlands
Turkey Turkey