I believe everyone should be very clear that the plastic molds we usually see are actually made of plastic molds and steel. However, because there are many kinds of plastic mold steel, many manufacturers do not know how to choose. Do you know what kind of steel is usually used to make plastic molds? The following seven and mold editors will introduce you:

1、S136：

1、S136：

S136塑胶模具钢材具有优良的耐蚀性、耐磨性、抛光性、机械加工性以及尺寸稳定性，可以广泛地应用于照相机、太阳眼镜、化学仪器及塑料制品等等。

S136 plastic mold steel has excellent corrosion resistance, wear resistance, polishing, machinability and dimensional stability. It can be widely used in cameras, sunglasses, chemical instruments and plastic products.

2、P20：

2、P20：

S136塑胶模具钢材的硬度比较均匀、加工性能佳，具有良好的抛光性能以及光蚀刻花性能。而且，由于它是在预硬状态下进行供货，无需再热处理就可以直接用于模具加工，因此它可适用于电视机前壳、电话机、饮水机、吸尘器等塑料模及模架中。

S136 plastic mold steel has uniform hardness, good processing performance, good polishing performance and photo etching performance. Moreover, because it is supplied in the pre hardening state and can be directly used for mold processing without reheating treatment, it can be applied to plastic molds and mold bases such as TV front shell, telephone, water dispenser and vacuum cleaner.

3、S136H：

3、S136H：

S136H是一种具备有的生产特性、优良的耐腐蚀性的塑胶模具钢材，抗锈蚀能力好，热处理变形少，而且它维护费用和生产成本都比较低。所以它主要可以适用于高抛光度及高要求的内模件，高耐腐蚀的塑料模具，生产、医疗、食品工业等产品中。

S136h is a plastic mold steel with some production characteristics and excellent corrosion resistance. It has good corrosion resistance, less heat treatment deformation, and its maintenance cost and production cost are relatively low. Therefore, it can be mainly applied to internal molds with high brightness and high requirements, plastic molds with high corrosion resistance, production, medical treatment, food industry and other products.

4、718：

4、718：

718塑料模具钢材不仅加工工艺简单，而且具备有优良的机械性、可加工性以及良好的抛光性能，十分受欢迎。特别是当718模具钢经过特殊的生产工艺在出厂预硬到了41~47HRC的硬度后，还可以减少部分工程中的热处理环节，提高经济效益。因此，目前己广泛用于模具的加工生产行业中，例如制造电视机壳，洗衣机，冰箱内壳，水桶等等。

718 plastic mold steel is not only simple in processing technology, but also has excellent machinability, machinability and good polishing performance. It is very popular. Especially when 718 die steel is pre hardened to the hardness of 41 ~ 47hrc after special production process, it can also reduce the heat treatment links in some projects and improve economic benefits. Therefore, it has been widely used in the processing and production industry of molds, such as manufacturing TV casings, washing machines, inner casings of refrigerators, buckets and so on.

5、NAK80：

5、NAK80：

NAK80属于预硬塑胶模具钢材，它具有很好的抛光性、切削性、蚀花性、雕饰性、放电加工性等。真空脱气精炼处理钢质纯净，无需热处理。因此它可以广泛地使用在镜面抛光模具，防灰尘，电视机滤光板，化妆品盒，精 密皱纹加工模具。或者是厚度不大于2MM薄板材，高能落料模，冲载模及压印模，各种剪刀，镶嵌刀片，木工刀片，螺纹轧制模和耐磨滑块，冷镦模具，热固树脂成型模，深拉成型模，冷挤压模具中。

NAK80 belongs to pre hardened plastic mold steel, which has good polishing, cutting, etching, carving, EDM and so on. The vacuum degassing refining steel is pure without heat treatment. Therefore, it can be widely used in mirror polishing mold, anti dust, TV filter plate, cosmetic box and precision wrinkle processing mold. Or in sheet metal with thickness no more than 2mm, high-energy blanking die, punching die and embossing die, various scissors, inlaid blade, woodworking blade, thread rolling die and wear-resistant slider, cold heading die, thermosetting resin forming die, deep drawing forming die and cold extrusion die.

以上所介绍的塑胶模具钢材，就是制造塑胶模具中常用、经济、实惠的几种钢材。但是制造出来的塑胶模具用途会有所不同，所以在选用的材料也需要按照实际用途而定。

The plastic mold steel introduced above is several kinds of steel commonly used, economical and affordable in the manufacture of plastic molds. However, the purpose of the plastic mold manufactured will be different, so the materials selected also need to be determined according to the actual purpose.