NM500 steel vs AR500 steel

NM500 steel and AR500 steel are both types of abrasion-resistant steels commonly used in applications requiring resistance to wear and impact. However, there are some differences between the two:

Composition: NM500 steel is a Chinese standard (GB/T 24186) for wear-resistant steel, while AR500 steel is an American standard (ASTM A128). The chemical compositions may vary slightly between the two standards, but they generally contain high levels of carbon and manganese to enhance hardness and toughness.

Hardness: Both NM500 and AR500 steels are known for their high hardness. NM500 typically has a Brinell hardness (HB) of around 500, while AR500 usually has a minimum hardness of 477 HB or higher, according to ASTM standards.

Impact Toughness: NM500 steel tends to have better impact toughness compared to AR500 steel. This means that NM500 can withstand greater impact forces without fracturing.

Availability: AR500 steel is more widely available and recognized in the industry, especially in the United States, where it is commonly used for targets, armor plates, and other applications. NM500 steel is more prevalent in China and may have limited availability internationally.

The specific properties of each steel grade can vary depending on the manufacturer and production processes. It's recommended to consult the relevant standards and specifications or contact the manufacturer for detailed information about the specific grades of NM500 or AR500 steel you are considering using.