Chemical Composition | |||||||||||
Grade | Chemical Composition / % | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Als | |
≤ Not More Than | Range | ≥ | |||||||||
NM300 | 0.23 | 0.70 | 1.60 | 0.025 | 0.015 | 0.70 | 0.50 | 0.40 | 0.050 | 0.0005~0.006 | 0.010 |
NM360 | 0.25 | 0.70 | 1.60 | 0.025 | 0.015 | 0.80 | 0.50 | 0.50 | 0.050 | 0.0005~0.006 | 0.010 |
NM400 | 0.30 | 0.70 | 1.60 | 0.025 | 0.010 | 1.00 | 0.70 | 0.50 | 0.050 | 0.0005~0.006 | 0.010 |
NM450 | 0.35 | 0.70 | 1.70 | 0.025 | 0.010 | 1.10 | 0.80 | 0.55 | 0.050 | 0.0005~0.006 | 0.010 |
NM500 | 0.38 | 0.70 | 1.70 | 0.020 | 0.010 | 1.20 | 1.00 | 0.65 | 0.050 | 0.0005~0.006 | 0.010 |
NM550 | 0.38 | 0.70 | 1.70 | 0.020 | 0.010 | 1.20 | 1.00 | 0.70 | 0.050 | 0.0005~0.006 | 0.010 |
NM600 | 0.45 | 0.70 | 1.90 | 0.020 | 0.010 | 1.20 | 1.00 | 0.80 | 0.050 | 0.0005~0.006 | 0.010 |
Mechanical Property | |||||||||||
Grade |
Thickness
mm |
Tensile Strength
R m / Mpa |
Elongation
A 50mm / % |
Impact Energy
KV 2 / J |
Brinell Hardness
HBW |
||||||
NM300 | ≤ 80 | ≥ 1000 | ≥ 14 | ≥ 24 | 270-330 | ||||||
NM360 | ≤ 80 | ≥ 1100 | ≥ 12 | ≥ 25 | 330-390 | ||||||
NM400 | ≤ 80 | ≥ 1200 | ≥ 10 | ≥ 26 | 370-430 | ||||||
NM450 | ≤ 80 | ≥ 1250 | ≥ 7 | ≥ 27 | 420-480 | ||||||
NM500 | ≤ 70 | - | - | - | ≥ 470 | ||||||
NM550 | ≤ 70 | - | - | - | ≥ 530 | ||||||
NM600 | ≤ 60 | - | - | - | ≥ 570 |