NM500 Wear-resistant Steel Plate
NM500 Wear-resistant Steel Plate is a high-strength, wear-resistant steel plate with high hardness (470–540 HBW), high tensile strength (≥1350–1600 MPa), good low-temperature toughness (impact absorption energy ≥24 J at -20℃), and wear resistance 3–5 times that of ordinary carbon steel plates.
NM500 Wear-resistant Steel Plate is produced using a quenching and tempering process, with a carbon content ≤0.38% and the addition of alloying elements such as Cr, Mo, and Ni to balance strength and toughness. The thickness is typically 6–60 mm; the surface needs to be milled 1.0–2.5 mm (2.0 mm recommended) before hardness testing.
Description
NM500 Wear-resistant Steel Plate is a high-strength, wear-resistant steel plate with high hardness (470–540 HBW), high tensile strength (≥1350–1600 MPa), good low-temperature toughness (impact absorption energy ≥24 J at -20℃), and wear resistance 3–5 times that of ordinary carbon steel plates.
NM500 Wear-resistant Steel Plate is produced using a quenching and tempering process, with a carbon content ≤0.38% and the addition of alloying elements such as Cr, Mo, and Ni to balance strength and toughness. The thickness is typically 6–60 mm; the surface needs to be milled 1.0–2.5 mm (2.0 mm recommended) before hardness testing.
Features of NM500 Wear-resistant Steel Plate:
1. High wear resistance: NM500 Wear-resistant Steel Plate has a Brinell hardness (HBW) of 470–540, and its wear resistance is 3–5 times that of ordinary steels such as Q235B steel plate, making it suitable for high-wear applications (such as crusher liners and excavator buckets).
2. Combination of high strength and toughness: NM500 Wear-resistant Steel Plate has a tensile strength ≥1350 MPa (some ≥1600 MPa), yield strength ≥1400 MPa, elongation ≥7%, and impact energy at -20℃ KV₂ ≥24 J.
3. Standards: Primarily based on GB/T 24186-2022 (current national standard), with some production according to enterprise standards (such as Q/XGJ); common grades are NM500A and NM500B. Chemical composition: C ≤0.38%, Si ≤0.70%, Mn 1.20–1.80%, P ≤0.015–0.025%, S ≤0.008–0.010%, Cr 0.50–1.80%, Mo 0.20–0.70%, Ni ≤1.20%, trace amounts of B to improve hardenability.
4. Processing limitations: Cold cutting is preferred (waterjet, shearing); hot cutting (plasma/laser) requires preheating to 100–200℃ and slow cooling; flame cutting easily causes cracks; welding requires preheating to 200–300℃, ultra-low hydrogen welding materials, multi-layer multi-pass welding, and post-weld hydrogen removal treatment.
Applications of NM500 Wear-resistant Steel Plate:
1. Construction Machinery: NM500 Wear-resistant Steel Plate is used in excavator bucket plates, bucket teeth, side cutting edges, bulldozer blades, loader buckets and blades, rotary drilling rig drill rods, etc.
2. Mining Machinery: Crusher liners (such as mantles, tooth plates, hammers), scraper conveyor troughs and sides, circular link chains, screen plates, and dump truck bed liners.
3. Metallurgy and Material Handling: Blast furnace hoppers, sintering machine liners, conveyor elbows, chutes, coal mill cylinder liners, and slurry pump casings.
4. Coal and Cement Industry: Coal hoppers, funnels, feed chutes, classifier blades, dust collector flues, and ball mill liners.
5. Other Heavy-Duty Wear-Resistant Components: NM500 Wear-resistant Steel Plates are also used in railway frogs, tank/tractor track plates, port loading and unloading machinery (such as forklift spreaders), and wear-resistant parts for sand and gravel aggregate equipment.
Specifications of Wear Resistant Steel Plate:
| Standard | GB | ASTM | SSAB OXELOSUND | JIS |
| GRADE | NM360, NM400, NM450, NM500, NM550, NM600 | XAR400, XAR450, XAR500, XAR550 | HAR400, HAR450, HAR500, HAR550, HAR600 | NK-EH360, JFE-EH400, JFE-EH450, JFE-EH500 |
| Thickness | 6.0-200mm，etc | |||
| Width | 1500-4100mm，etc | |||
| Length | 2000-12000mm，etc | |||
| Standard | ASTM，AISI，JIS，GB， DIN，EN | |||
| Certification | ISO, SGS，BV | |||
| Grade | |||||
| Chemical Composition ( ≤ ) | NM300 | NM360 | NM400 | NM450 | NM500 |
| C | 0.23 | 0.25 | 0.3 | 0.35 | 0.38 |
| Si | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Mn | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 |
| P | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| S | 0.015 | 0.015 | 0.01 | 0.01 | 0.01 |
| Cr | 0.7 | 0.8 | 1 | 1.1 | 1.2 |
| Ni | 0.5 | 0.5 | 0.7 | 0.8 | 1 |
| Mo | 0.4 | 0.5 | 0.5 | 0.55 | 0.65 |
| Thickness (mm) | ≤80 | ≤80 | ≤80 | ≤80 | ≤70 |
| Tensile strength (MPa) | ≥1000 | ≥1100 | ≥1200 | ≥1250 | — |
| Elongation A (%) | ≥14 | ≥12 | ≥10 | ≥7 | — |
| Surface Brinell hardness (HBW) | 270-330 | 330-390 | 370-430 | 420-480 | ≥470 |
| Grade Comparison | |||||
| GB | NM300,NM360,NM400,NM450,NM500 | ||||
| SS | HARDNESS400, HARDNESS450, HARDNESS500, HARDNESS600 | ||||
| DIN | XAR400, XAR450, XAR500, XAR600, Dillidur400, Dillidur500 | ||||
| NBN | QUARD400, QUARD450, QUARD500 | ||||
| NF | FORA400, FORA500, Creusabro4800, Creusabro8000 | ||||
| JIS | JFE-EH360 , JFE – EH400 , JFE – EH500 , WEL-HARD400 , WELHARD500 | ||||
| SFS | RAEX400, RAEX450, RAEX500 | ||||
| Mechanical Properties | ||||||
| Material | Thickness(mm) | Strength of extension | Elongation | Impact energy(vertical) | BH(Brinell Hardness) | |
| ℃ | Akv/J | |||||
| NM300 | 6-80 | ≥1000 | ≥14 | -20 | ≥24 | 270-300 |
| NM360 | 6-80 | ≥1100 | ≥12 | -20 | ≥24 | 330-390 |
| NM400 | 6-80 | ≥1200 | ≥10 | -20 | ≥24 | 370-430 |
| NM450 | 6-80 | ≥1250 | ≥7 | -20 | ≥24 | 420-480 |
| NM500 | 6-70 | / | / | / | / | ≥470 |
| NM550 | 6-70 | / | / | / | / | ≥530 |
| HarDox450 | 5-50 | ≥1400 | 10 | -40 | ≥35 | 425~475 |
| HarDox500 | 5-50 | / | / | -40 | ≥30 | 450~540 |
| HarDox550 | 5-50 | / | / | -40 | ≥24 | 450~540 |
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