51Cr8Si2 - GB /T 12773-2021 - H2ABC

中文版

Grade	51Cr8Si2
Corresponding Standard	GB /T 12773-2021 Valve Steel and Superalloy Bars for Internal Combustion Engines
Classification	Martensitic Stainless Steel

51Cr8Si2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.47	1	0.2	-	-	7.5	-	-
Maximum Value	0.55	2	0.6	0.03	0.03	9.5	0.6	0.3

51Cr8Si2 Mechanical Properties

condition	Test Temperature	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Sample d=25	Room Temperature	1000~1050°C Oil quenching + 650~750°C Air cooling	≥885	Rp0.2: ≥685	≥14	≥35	≥260
Bar or Coil	Room Temperature	Annealed					≤269
sample		Quenching + Tempering	High Temperature Short-Term Tensile Strength 500	High-temperature short-term yield strength 400
sample		Quenching + Tempering	High temperature short-term tensile strength 360	High-temperature short-term yield strength 300
sample		Quenching + Tempering	High temperature short-term tensile strength 230	High temperature short-term yield strength 220
sample		Quenching + Tempering	High temperature short-term tensile strength 160	High temperature short-term yield strength 110
sample		Quenching + Tempering	High temperature short-term tensile strength (105)	High temperature short-term yield strength (75)

Approximate Comparison Table Martensitic Heat-Resistant Steel

China	Japan	International Organization for Standardization
GB	JIS	ISO
51Cr8Si2	SUH11	X50CrSi 8 2

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!