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)
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