Certificates

WYJ034-2005                    WZB-NM400

 

1, suitable for:the standard is applicable to wear resistance, suitable for welding of high strength steel for structural use, mainly used in mines and all kinds of engineering machinery parts processing and manufacturing with wear-resisting, the use of steel structure.

2, size, shape, roughness, weight and allow deviation

The size of the steel plate, appearance, roughness, weight and deviation should be allowed to meet the provisions of GB709-88.

3, brand empress method, codes and symbols

3.1Steel grades represented by manufacturer, steel plates organization, usage, hardness and quality rating of five parts according to the order. For example: WZB-NM400A.

3.2 symbols

W-indicate wuyang steel limited liability company production of the "dance" word is Chinese pinyin first letters;

ZB indicate The organization of steel shall prevail bainite "must have" and "beta" word Chinese pinyin first letters;

NM-indicate the "resistance" wear-resisting purposes and "ground" word Chinese pinyin first letters;

A, B, C, D-is quality grade.

4, technical requirements

4.1 grades and chemical composition

4.4.1 steel grades and chemical composition (melting analysis) shall conform to the provisions of the table 1.

table 1

 

brand	grade	chemical composition  wt%
		C	Si	Mn	P	S	Mo	Cr
WZB- NM400	A	0.17 ～ 0.22	1.60 ～ 2.00	1.70 ～ 2.20	≤0.020	≤0.010	0.40 ～ 0.60	0.60 ～ 0.90
	B	0.17 ～ 0.22	1.7 ～ 2.00	1.80 ～ 2.20	≤0.020	≤0.010	0.40 ～ 0.60	0.60 ～ 0.90

 

Note: allow steel alloy strengthening add micro elements, such as the V.

4.2 delivery status: the tempering.

4.3 mechanical properties

4.3.1 steel plate mechanical properties should be able to comply with the relevant provisions of the table 2.

Table 2

 

brand	grade	thick （mm）	hardmess （HB）	tensile property			20℃ AKV transverseJ
				Rp0.2(MPa)	Rm(MPa)	A50(%)
WZB- NM400	A	＜50	360～420	provide	provide	provide	provide
		≥50	340～420
	B	＜50	360～420	≥900	≥1150	≥10	≥25
		≥50	340～420

4.3.2, provide the measured value（AKV）of steel plate transverse impact in 0℃、－20℃