51Si7 Y51S7 - NF A 35-590-1992

51Si7 Chemical Element Composition Content (%)

Component	C	Si	Mn
Minimum Value	0.48	1.6	0.5
Maximum Value	0.54	2	0.8

51Si7 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Tool steel	Softening Annealing	≤248
Tool steel	Quenching at 880°C, water cooling, tempering at 180°C, hold for 1h	HRC: ≥52

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