80Cr20Si2Ni XB - GB /T 12773-2021

Grade	80Cr20Si2Ni
Other Names
Corresponding Standard	GB /T 12773-2021 Valve Steel and Superalloy Bars for Internal Combustion Engines
Classification	Martensitic Stainless Steel

80Cr20Si2Ni Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.75	1.75	-	-	-	19	1.15	-
Maximum Value	0.9	2.6	0.8	0.03	0.03	20.5	1.7	0.3

80Cr20Si2Ni 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	1030~1080°C Oil quenching + 700~800°C Air cooling	≥880	Rp0.2: ≥680	≥10	≥15	≥295
Bar or Coil	Room Temperature	Annealed					≤321
sample		Quenching + Tempering	High Temperature Short-Term Tensile Strength 550	High-temperature short-term yield strength 500
sample		Quenching + Tempering	High temperature short-term tensile strength 400	High-temperature short-term yield strength 370
sample		Quenching + Tempering	High temperature short-term tensile strength 300	High temperature short-term yield strength 280
sample		Quenching + Tempering	High temperature short-term tensile strength 230	High temperature short-term yield strength 170
sample		Quenching + Tempering	High temperature short-term tensile strength 180	High temperature short-term yield strength 120

1 Approximate Comparison Table Martensitic Heat-Resistant Steel

2 Approximate Comparison Table Valve Steel

China

Taiwan, China

Japan

South Korea

United States

Germany

France

European Standard

Russia

United Kingdom

ISC

CNS

JIS

Commercial Grade

UNS

SAE

DIN EN/DIN

W-Nr.

NF EN/NF

Numerical Grade

GOST

BS EN/BS

80Cr20Si2Ni
(8Cr20Si2Ni)

S48380

SUH 4

STR 4

Sil XB

S65006

HNV6

X80CrSiNi 20

1.4747

Z80CNS 20-02

X80CrSiNi 20

1.4747

80Х20Н2С2

443S65

80Cr20Si2Ni Corresponding Standards(Same grade name, different standards)

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