NM400 gives roughly 20–30% more wear life in sliding abrasion and is the default for mining duty. NM360 wins where forming, welding volume or budget dominates and abrasion is moderate.

Grades · Wear-Resistant Plate · NM360

NM360

Data under review

NM360 is the entry grade of China’s GB/T 24186 abrasion-resistant plate family: a 360 HBW class plate that roughly triples the wear life of mild steel while staying easy to cut, bend and weld — the economy choice for moderate abrasion.

Hardness330–390 HBW

DIN— (cf. XAR360 class)

AISIAR360 class

GBNM360 (GB/T 24186)

CategoryWear-Resistant Plate

Chemical composition

Element	Content (%)
C	≤0.20
Si	≤0.50
Mn	≤1.60
P	≤0.025
S	≤0.010
Cr	≤0.80
Ni	≤0.50
Mo	≤0.40
B	≤0.004

Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.

Properties

Hardness	330–390 HBW
Tensile strength	≥1100 MPa (typ.)
Impact	≥24 J at −20 °C (typ. spec)
Density	7.85 g/cm³

Heat treatment

Delivered quenched or quench-tempered — do NOT re-heat above ~250 °C in service or processing.

Equivalent grades

Standard	Designation
din	— (cf. XAR360 class)
aisi	AR360 class
gb	NM360 (GB/T 24186)

Compare side by side: NM360 vs NM400 · NM360 vs NM450

Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.

Applications & Processing

Applications: Truck beds and trailer floors, agricultural machinery, chutes and hoppers, low-impact wear liners.

Processing: The most fabrication-friendly NM grade: cold bending with radii ≥3× thickness, standard low-hydrogen welding, plasma/laser cutting.

FAQ

NM360 or NM400?: NM400 gives roughly 20–30% more wear life in sliding abrasion and is the default for mining duty. NM360 wins where forming, welding volume or budget dominates and abrasion is moderate.

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Source: GB/T 24186 published ranges (mill-dependent) · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.