NM400 Abrasion Resistant Steel Plate
NM400 Abrasion Resistant Steel Plate is a high-strength, wear-resistant steel plate. The “400” indicates its Brinell hardness (HBW) value is approximately 400, typically ranging from 360 to 450 HBW. Its wear resistance is 3 to 5 times that of ordinary low-carbon or low-alloy steel plates, making it suitable for high-abrasion wear conditions (such as mining and construction machinery).
The NM400 Abrasion Resistant Steel Plate conforms primarily to GB/T 24186-2022, corresponding to international grades such as HARDOX400 (Sweden), JFE-EH400 (Japan), and 400V (Germany).
Description
NM400 Abrasion Resistant Steel Plate is a high-strength, wear-resistant steel plate. The “400” indicates its Brinell hardness (HBW) value is approximately 400, typically ranging from 360 to 450 HBW. Its wear resistance is 3 to 5 times that of ordinary low-carbon steel plate or low-alloy steel plates, making it suitable for high-abrasion wear conditions (such as mining and construction machinery).
The NM400 Abrasion Resistant Steel Plate conforms primarily to GB/T 24186-2022, corresponding to international grades such as HARDOX400 (Sweden), JFE-EH400 (Japan), and 400V (Germany).
Features of NM400 Abrasion Resistant Steel Plate:
1. High strength and good toughness: NM400 Abrasion Resistant Steel Plate has a yield strength ≥900 MPa (some reach 1100–1300 MPa), tensile strength ≥1200 MPa, elongation ≥10%, and maintains an impact energy ≥24–35 J even at -20℃ or even -40℃ (such as NM400E-TL).
2. Quenched and tempered delivery condition: NM400 Abrasion Resistant Steel Plate undergoes a quenching and tempering process, balancing hardness and toughness; the hardness uniformity is good when the thickness is ≤80mm, while the center hardness of ultra-thick plates (>80mm) decreases slightly (approximately 330–430 HBW).
3. Good machinability but requires process control: NM400 Abrasion Resistant Steel Plate supports cutting, bending, and welding (preheating to 100–200℃ and slow cooling to prevent cracking). Hot cutting of thick plates easily causes delayed cracking; plasma/laser cutting or underwater cutting is recommended.
4. Typical composition: C ≤0.25%, Mn ≤1.60%, Si ≤0.70%, P/S ≤0.025%/≤0.010%, with micro-alloying reinforcement of Cr, Mo, Ni, B, etc. Non-surface welded wear-resistant plate (overall homogeneous structure).
Applications of NM400 Abrasion Resistant Steel Plate:
1. Construction Machinery: NM400 Abrasion Resistant Steel Plate is used for excavator bucket plates, side cutting edges, blades, loader and bulldozer bucket teeth and liners, and rotary drilling rig drill rods.
2. Mining and Coal Mining Machinery: Crusher liners (jaw plates, impact plates), coal mill cylinder liners, scraper conveyor troughs and sprockets, bottom/side plates of mining dump truck cargo boxes.
3. Metallurgy and Power Industry: Blast furnace hoppers, sintering machine liners, dust collector flues, coal hoppers, inlet and outlet pipes of medium-speed coal mills, bucket wheel excavator liners.
4. Cement and Building Materials Industry: Chutes, hoppers, classifier blades, screw conveyor liners, mixer linings.
5. Material Conveying Systems: Feed chutes, hoppers, belt conveyor idler roller guards, port and dock unloader components.
6. Special Vehicles and Environmental Protection Equipment: NM400 Abrasion Resistant Steel Plate for dump truck bodies, sanitation vehicle buckets, and wear-resistant linings for garbage compactors.
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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