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Conquest Steel & Alloys stocks and supplies Abrasion Resistant 550 Plates to industries across India and 90+ countries worldwide. We procure our AR 550 plates directly from mills with international production standards, ensuring the buyers receive consistent hardness values, traceability and on-time dispatch through a single supply chain. We have a headquarters in Mumbai and warehousing facilities of over 14,000 sq. mts. across Kalamboli and Taloja.
At 550 HBW (±25), AR 550 plates sit at the high end of the wear-resistant steel spectrum. Most standard structural plates top out at 200–250 HBW. That 2x–2.5x hardness advantage provides longer service life on surfaces exposed to constant sliding, impact, or gouging. These are the three failure modes that claim equipment in mining, bulk material handling, and demolition work.
The plate achieves this hardness through a quench-and-temper (Q+T) heat treatment process, not through thick cross-sections. A 12 mm AR 550 plate delivers the same 550 HBW surface guarantee as a 50 mm plate, which allows engineers to reduce component weight without trading away wear life.
Yield strength reaches 1,400 N/mm² and tensile strength peaks at 1,700 N/mm². These values place this grade well above typical high-strength structural steels. Yet the plate retains 7% elongation and enough ductility to absorb impact loads without cracking. Impact toughness holds at 30 J at −40°C, a figure that matters for equipment operating in cold northern environments or refrigerated processing plants.
Bucket lips, floor liners, and crusher wear parts are applications where softer grades need replacement within months. AR 550 runs significantly longer across all three. The plate's chromium content (up to 1.14%) adds corrosion resistance that most pure wear-resistant grades lack, making it a practical choice for wet handling environments, slurry chutes, and coastal industrial facilities.
Five industries drive the bulk of demand:
- Mining and Quarrying: The 550 HBW hardness guarantee is beneficial for feed hoppers, chute liners, dump truck bodies and excavator buckets, especially in hard-rock quarrying where silica abrasion speeds up liner wear.
- Bulk Material Handling: Conveyor flights, transfer chutes, and silo discharge liners in cement, coal, and aggregate plants face constant abrasion from loaded material. AR 550 outlasts mild steel liners by a factor of 4–6x in typical sliding-wear conditions.
- Steel and Slag Processing: Ladle rims, slag pot liners, and foundry floor plates handling abrasive slags operate at temperatures and impact levels that demand both hardness and toughness. The 30 J impact value at −40°C also provides a buffer advantage across wide temperature swings.
- Demolition and Recycling: Shredder hammers, shear blades and crusher side plates, are subjected to continuous high impact wear. AR 550’s chemical composition, with a boron limit of max 0.004% and a molybdenum limit of max 0.60%, builds in crack tolerance minimizing the risk of brittle fracture under severe impact cycles.
- Construction Equipment: Dozer blades, grader cutting edges, and trenching attachments in hard-ground construction require far less frequent replacement with AR 550 than with standard wear plate, lowering total lifecycle cost per operating hour.
Abrasion Resistant 550 Plate Specification :
Conquest Steel & Alloys supplies AR 550 plates across a broad dimensional range, covering thickness requirements from light wear liners to heavy-duty structural wear components.
Item : Abrasion Resistant Plate
Thickness : 8 - 65 mm
Width : Up to 2900 mm
Length : Up to 14630 mm
Heat Treatment : N, Q+T
Surface Paint : EP, PE, HDP, SMP, PVDF
Production : Hot-Rolled (HR) / Cold-Rolled (CR)
Material : Abrasion Resistant 550, HB 550 Steel Plate, AR 550 Wear Resistant Plates
Abrasion Resistant 550 Plates Chemical Composition
The alloy balance below defines the trade-off AR 550 makes between hardness and weldability. Carbon at max 0.37% keeps crack-equivalent values manageable, while the chromium-nickel-molybdenum combination delivers through-thickness hardness without brittle microstructure.
| Plate Thickness | C | Si | Mn | Cr | Ni | Mo | B |
| 10-50 mm | 0.37 Max % | 0.50 Max % | 1.30 Max % | 1.14 Max % | 1.40 Max % | 0.60 Max % | 0.004 Max % |
Abrasion Resistant 550 Plates Mechanical Properties
AR 550 plates ship with a certified hardness guarantee of 550 HBW ±25, not a typical or nominal value. The carbon equivalent values (CEV = 0.72 / CET = 0.48) indicate that controlled preheat welding procedures apply.
| Hardness [HBW], guarantee | Impact toughness, typical 20 mm | Yield strength | Tensile strength, | Elongation | Carbon equivalents, typical |
| 550 (±25) | 30 J / −40°C, 22 Ft-lb / −40°F | 1,400 N/mm² (205 ksi) | 1,700 N/mm² (247 ksi) | 7 % | CEV = 0.72 / CET = 0.48 |
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Abrasion Resistant® 550 Plate We Supply Globally :
We Supply Our Abrasion Resistant 550 Wear Plates to various countries like Afghanistan, Algeria, United Arab Emirates, South Africa, Hungary, Slovakia, Israel, Romania, Italy, Gabon, Zimbabwe, Serbia, Belgium, Canada, Venezuela, Bahrain, Oman, United States, Iran, Mexico, Trinidad & Tobago, Lithuania, South Korea, Denmark, Greece, Iraq, Portugal, Kazakhstan, Libya, Azerbaijan, Bulgaria, Mexico, Czech Republic, Poland, Argentina, Russia, Ukraine, United Kingdom, Angola, Finland, New Zealand, Austria, Hong Kong, Saudi Arabia, Egypt, Qatar, Estonia, Colombia, Nigeria, Morocco, Spain, Iran, Norway, Bolivia, Yemen, India, Belarus, Costa Rica, China, Lebanon, Vietnam, Mongolia, Indonesia, Puerto Rico, Bangladesh, Jordan, Chile, Brazil, Nepal, Chile, Tibet, Sri Lanka, Taiwan, Gambia, France, Ghana, Bhutan, Switzerland, Sweden, Malaysia, Nigeria, Australia, Ireland, Turkey, Peru, Singapore, Kuwait, Pakistan, Ecuador, Japan, Netherlands, Poland, Macau, Tunisia, Namibia, Germany, Kenya, Croatia, Thailand, Philippines.
Abrasion Resistant 550 Plates We Supply Worldwide :
We Supply Our Abrasion Resistant 550 Steel Plate to various cities like Los Angeles, Houston, Dubai, Chandigarh, Santiago, Ankara, Montreal, Ranchi, Tehran, Algiers, Doha, Gimhae-si, Hyderabad, Caracas, La Victoria, Aberdeen, Al Khobar, Bhopal, Milan, Indore, Singapore, Navi Mumbai, Port-of-Spain, Riyadh, Abu Dhabi, Melbourne, Muscat, Thane, Toronto, Ernakulam, Sydney, Seoul, Haryana, Mumbai, Chiyoda, Baroda, Kolkata, Kanpur, Edmonton, Vadodara, Ulsan, Faridabad, New Delhi, Courbevoie, Karachi, Calgary, Geoje-si, Granada, Coimbatore, Thiruvananthapuram, London, Perth, Gurgaon, Ludhiana, Nashik, Cairo, Dallas, Rajkot, Bengaluru, Dammam, Hanoi, Busan, Pimpri-Chinchwad, Jeddah, Ho Chi Minh City, Brisbane, Moscow, Istanbul, Kuala Lumpur, Jaipur, Visakhapatnam, Jakarta, Rio de Janeiro, Petaling Jaya, Secunderabad, Ahmedabad, Colombo, Ahvaz, Jamshedpur, Pune, Noida, Hong Kong, Kuwait City, Madrid, Howrah, Vung Tau, Manama, Lahore, Atyrau, New York, Sharjah, Bangkok, Surat, Al Jubail, Mexico City, Bogota, Nagpur, Lagos, Chennai.
Frequently Asked Questions
AR 550 delivers a guaranteed 550 HBW hardness, a tensile strength of 1,700 N/mm², and 30 J impact toughness at −40°C. It is one of the few wear plate grades that combines high surface hardness with low-temperature toughness in a single specification.
The guaranteed hardness range runs 525–575 HBW. This certified band means every plate leaving the mill meets the minimum before it reaches your application, with no reliance on nominal midpoint values.
AR 500 carries a 500 HBW hardness guarantee and a tensile strength of roughly 1,550 N/mm². AR 550 adds 50 HBW and approximately 150 N/mm² in tensile strength, translating into 15–20% longer wear life in most sliding-abrasion applications, with somewhat higher preheat requirements during welding.
Mining, bulk material handling, cement, demolition, and construction equipment manufacturing account for the largest share of demand. Any application where a liner or wear surface contacts abrasive media such as ore, slag, rock, or aggregate is a strong candidate for this grade.
Stock covers 8–65 mm thickness, widths up to 2,900 mm, and lengths up to 14,630 mm in both hot-rolled and cold-rolled production. Custom-cut sizes are available directly from our Taloja facility.
Yes, but the CEV of 0.72 requires a controlled preheat, typically 100–200°C depending on plate thickness, to prevent cold cracking in the heat-affected zone. Low-hydrogen electrodes and a post-weld slow-cool procedure protect hardness values near the weld.
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