——NM400
NM400 Wear resisting steel adopt the first Word Pinyin NaiMo and its HBW value to name the grade;
400——Show the average brinell hardness of steel plate
1.NM400 belong to low alloy wear resistant steel
2.Named:NM400.
3.NM4000 its average HBW is 400
(International Stipulation Range of HBW:370~430).
4.The Delivery Status NM400:quenched and Tempered .
5.Steel Plate size, Shape, Weight and allowable Deviation: should comply with the provisions of GB/T709.
6.Steel Surface Quality:conform to GB/T 3274;
7.The provisions of this standard and acceptance inspection items of the reinspection rules shall comply with the provisions of GB/T 17505.
8.Rolled Range:3-80mm(Other thickness two sides negotiate)
9.Chemical and mechanical Property:as following form
NM400 Chemical Property
GRADE |
Chemical Property(Quality Percent)/% |
||||||||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
Ti |
Bta |
AIs |
CEV |
|||
|
≤ |
|
≥ |
≤ |
|||||||||||
NM400 |
0.3 |
0.70 |
1.60 |
0.025 |
0.010 |
1.0 |
0.70 |
0.50 |
0.050 |
0.0005~0.006 |
0.010 |
0.55 |
|||
Bta stands for Boron content。 |
NM400 Mechanical Property
GRADE |
THICK mm |
TENSIBLE STRENGTH Rm MP a |
YIELD STRENGTH A50 % |
—20℃ IMPACT TEST AKv / J |
HBW |
NM400 |
3~80 |
≥1200 |
≥10 |
≥24 |
370~430 |
Tensile strength, elongation and impact energy as the special requirements of performance, such as customer did not indicate in the contract, the only guarantee the brinell hardness. |
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