The Difference Between 9CrWMn and CrWMn mold steel

CrWMn mold steel is an improved variant of 9CrWMn mold steel; by increasing the content of Carbon (C), Chromium (Cr), and Tungsten (W), it achieves superior hardenability. When oil-quenched, it can achieve full through-hardening in workpieces ranging from Φ40 mm to Φ50 mm in diameter. Furthermore, it exhibits minimal deformation during quenching, leading to its customary designation as "low-deformation steel."
 
CrWMn mold steel is a widely used mold steel material, distinguished by numerous unique characteristics and superior performance properties. Foremost among these attributes, CrWMn mold steel exhibits exceptional hardness and wear resistance.
 
Following appropriate heat treatment, CrWMn mold steel achieves a state of high hardness, enabling it to withstand the wear and abrasion generated during the mold's operational use, thereby extending the service life of the mold.
 
9CrWMn mold steel requires a quenching treatment performed within a temperature range of 800°C to 830°C, utilizing oil cooling as the quenching medium. This specific heat treatment process ensur.es that the steel acquires a uniform microstructure and superior mechanical properties.