GB/T 24186 steel plate

GB/T 24186 steel is a kind of high strength abrasion resistant steel plates for contrcution machine. There are seven steel grades under this standard: NM300, NM360, NM400, NM450 NM500, NM550, NM600. The GB/T 24186 standard specifies the brand, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of high-strength wear-resistant steel plates for construction machinery. This standard is applicable to NM400, NM450 NM500, NM550 steel plates with a thickness of 80 mm or less for wear-resistant structural parts of mining machinery, construction, agriculture and other construction machinery.

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Steel properties

GB/T 24186 steel plate chemical composition(%):

Material	C max .	Si max .	Mn max .	P max .	S max .	Cr max .	Ni max .	Mo max .	Ti max.	B max .	Als min.
NM400	0.30	0.70	1.60	0.025	0.010	1.00	0.70	0.50	0.050	0.005- 0.006	0.010
NM450	0.35	0.70	1.70	0.025	0.010	1.10	0.80	0.55	0.050
NM500	0.38	0.70	1.70	0.020	0.010	1.20	1.00	0.65	0.050
NM550	0.38	0.70	1.70	0.020	0.010	1.20	1.00	0.70	0.050
NM600	0.45	0.70	1.90	0.020	0.010	1.20	1.00	0.80	0.050

GB/T 24186 steel plate mechanical properties:
GB/T 24186

Steel Grade	Thickness	Hardness (HBW)	Elongation % min.	Tensile strength(MPa) min.
NM400	≤80	370-430	10	1200
NM450	≤80	420 - 480	7	1250
NM500	≤70	470min.	-	-
NM550	≤70	530 min.	-	-
NM600	≤60	570 min.	-	-

GB/T 24186 steel equivalent grades:

Steel Standard	Steel Grades
Sweden	HARDOX400	HARDOX450	HARDOX500	HARDOX600
Germany	XAR400	XAR450	XAR500	XAR600
Bao Steel	B-HARD360	B-HARD400	B-HARD450	B-HARD500
China	NM360	NM400	NM450	NM500
Finland	RAEX400	RAEX450	RAEX500	-

Application

GB/T 24186 steel plate application:
GB/T 24186 steel plates NM400, NM450 NM500 abrasion resistant steel are widely used in underground mines, cement industry, road construction, mining and open-pit mining and metallurgical industries and manufacturing other wear-resistant parts.

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