Description

NM450 Wear Resistant Steel Plate is a high-strength, wear-resistant steel plate. “450” represents its average Brinell hardness of approximately 450 HBW, and it primarily conforms to the GB/T 24186 standard. It can replace international products such as SSAB HARDOX 450, JFE NK-EH450, and DILLIDUR 450V.

Features of NM450 Wear Resistant Steel Plate:

1. High Hardness and Wear Resistance: NM450 Wear Resistant Steel Plate has a surface hardness ≥450 HBW (actually typically 450–520 HBW), and its wear resistance is 15–20 times that of ordinary low-carbon steel plates, making it suitable for applications with strong abrasive wear.

2. High Strength and Good Toughness: NM450 Wear Resistant Steel Plate has a yield strength ≥950 MPa and a tensile strength ≥1180 MPa, while also possessing good ductility (elongation ≥8%) and low-temperature impact toughness (≥20–24 J at -20°C).

3. Alloying and Heat Treatment: NM450 Wear Resistant Steel Plate is manufactured using a medium-to-high carbon alloy (≈0.25–0.35%) with alloying elements such as Cr, Mo, and Ni, and is produced through a quenching and tempering process to ensure uniform core and surface properties.

4. Machinability: NM450 Wear Resistant Steel Plate can be laser-cut, drilled, and bent (requiring appropriate processes). Preheating and the use of high-strength welding materials (such as ER100S-G) are required during welding to prevent cracking. Common thicknesses are 8–60 mm (some manufacturers can achieve 100 mm), and widths are 1500–3000 mm.

Applications of NM450 Wear Resistant Steel Plate:

1. Construction Machinery: NM450 Wear Resistant Steel Plate is used for excavator bucket plates, bucket bottom plates, bulldozer cutting edges, loader tooth plates, and dump truck bed bottom plates;

2. Mining and Coal Mining Machinery: Crusher liners (jaw plates, impact plates), ball mill liners, scraper conveyor troughs, skips, and screen plates;

3. Metallurgical and Power Equipment: Sintering machine liners, coal mill cylinders, ash ducts, dust collector liners, and chutes;

4. Building Materials and Environmental Protection Machinery: Concrete mixer liners, brick making machine molds, cyclone dust collectors, and hoppers;

5. Other Heavy-Duty Wear-Resistant Components: Railway frogs, port machinery grabs, shot blasting machine liners, and wear-resistant bearing structural components.

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)
Material	Thickness(mm)	Strength of extension	Elongation	℃	Akv/J	BH(Brinell Hardness)
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