WYJ007-2005                        WSM136A

1. The technology conditions apply to manufacture the plastic mould parts with thickness is not more than 305 mm in the WSM136A alloy die steel plate sclerosis.

2. The size, shape, weight and allow deviation

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

2.2 steel plate roughness requirements:nomore than 7 mm/m

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

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

2.5 for weight and mark

Plates shall be ordered to theoretical weight delivery, steel plate width to steel plate, the head, in 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.

2.6 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 1.

表1    Wt％

3.2 delivery status:

3.4 delivery hardness: hot rolling and tempering hardness HB 280 ~ 340, the hardness of the steel plate surface head, tail hardness, average.