Certificates

WYJ011-2006                             P80H

1. The technology conditions apply to make synthetic machinery accessories with thickness is no more than the 150 mm P80H alloy steel structure.

2. The size, shape, weight and allow deviation

2.1 the edge rolling steel plate qi, cut the head and tail, don't cut two longitudinal and edge.

2.2 steel plate roughness requirements:

2.2.1 steel vertical roughness ≤7 mm/M

2.3 plate thickness tolerance:-0 ~ + 3 mm.

2.4 the length of steel plate tolerance: + 20 ~ + 50 mm.

Flash 2.5 steel plate cushion control (see table 1)

Table 1        unit ：mm

 

thickness of plating	Flash allowance
＜80	≥40
≥80～150	≥50
≥150～205	≥60

 

Note: the flash allowance for bilateral comprehensive allowance

2.6 remember weight and mark

Plates shall be ordered to theoretical weight delivery, steel plate width to steel plate, the head, middle and tail the three places of the width of the average minus the minimum allowance of steel for flash for weight width; Steel plate with the actual length length minus the minimum length for weight tolerance for length. "＜100 mm thickness steel plate, the added value of the thickness of 0.5 mm; 100 mm steel plate thickness frequency, the added value of the thickness of 1.0 mm. According to the regulations of the steel plate GB247 marking.

2.7 the rest of the steel plate size and shape, weight and deviation should be allowed to meet the provisions of GB709-88.

3. Technical requirements

3.1 the chemical composition of the steel plate (melting analysis) shall conform to the provisions of table 2.

Table 2   Wt％

 

Steel grade	Chemical composition
	C	Si	Mn	P	S	Cr	Mo	Ni
P80H	MAX 0.40	MAX 0.50	MAX 1.50	≤0.020	≤0.010	MAX 2.00	MAX 0.50	MAX 1.20

 

3.2 delivery status: normalized and tempering.

3.3 delivery hardness: 718 H hardness of 320 ~ 380 HB. Among them the steel plate surface hardness test for head, tail, hardness average.