M42 High speed tool steel

1.M42/SKH-9 2.High speed tool steel 3.good machinability and polishing property 4.apply to die and cutting tool industry

M42

High speed tool steel

   All the high speed tool steels are refined with electroslag remelting ( ESR ). After improving for more than 30 years, the kinds of the steels are more and more complete, and the quality has reached the international advanced level, which can be compared with Japanese YXM1.There are three types of the steel: ordinary, economic and high performance, with the ordinary high speed steel to be the leading products and the high performance and the powder metallurgy high speed steel to be the focus of the development. We develop new steels according to the needs of customers. The needs of customers and the practical application combined to completely control the quality characteristics such as chemical composition, carbide morphology, surface decarburization and dimensional accuracy. Focusing on the degree of alloy, carbon saturation, component dispersion and purity will ensure the reliability and consistency of the products.

  

With good toughness and high performance high speed tool steel

 

Specialty:

 

W-MO (6-5-2) is the most common high speed tool steel, especially SKH9 (SKH51). It replaces the W high speed tool steel SKH2 to be NO.1 of using in the world.    The organization structureof carbide is slight and neat. It has good distribution and symmetrical organization. And it also has good resistance to wear. As it is only the increase or decrease of carbon. It will not damage the high temperature characteristics and can be continuously and substantially alter the properties of the steel. It can do hot work and cold work and it has good machinability and polishing property

 

 

Chemical composition:

 

Steel grade	JISThe corresponding designation	Chemical composition ( % )
		C	Si	Mn	Cr	Mo	W	V
SKH9	SKH51	0.85	0.3	0.3	4	5	6	2

 

Heat treatment

 

Forging temperatur(°C)	Annealing	Quenching			Tempering		Hardness HRC
		To heat	Austenitizing	Coolant	Temperature	Tempering
1120~900cooling slowly	820~880cooling slowly in the stove	820~880cooling slowly	1210-1230	A.O.H	540-590	2-3	64-56

 

Use:

 

cutting: drill, tap, reamer, circular saw, gear cutter, broach, planer etc.Die: all kinds of hot work, cold work die and punch, cutter, cutter, various gadolinium roll tool etc.

The specifications of high speed steel

Varieties	Specifications(mm)	Condition of delivery
Line cutting plate	(4~80mm)×(200~300mm)×(200~300mm)	Six surfaces grinded, HRC62-64
Hot rolled steel plate	(500~700mmm)×(2.0~8.0mm)	Black
Hot rolled round steel	Φ8~25mm	Black
	Φ26~70mm	Decorticate with emery cutter
Forging round steel	Φ70~200mm	Decorticate with emery cutter
	Φ200~260mm	Black
Hot rolled flat steel	(3.5~20mm)×(16~65mm)	Black /Polishing
Forge piece	(1~600mm)×(1000~6000mm)	Black

M42 High speed tool steel