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Home Material GB /T 12773-2021
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Grade 53Cr21Mn9Ni4N
Other Names
Corresponding Standard GB /T 12773-2021
Valve Steel and Superalloy Bars for Internal Combustion Engines
Classification Austenitic Stainless Steel
Properties Corrosion Resistance
53Cr21Mn9Ni4N Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu N More
Minimum Value 0.48 - 8 - - 20 3.25 - 0.35 C+N≥0.9
Maximum Value 0.58 0.35 10 0.04 0.03 22 4.5 0.3 0.5
53Cr21Mn9Ni4N Mechanical Properties
condition Test Temperature Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
Sample d=25 Room Temperature 1140~1200°C Solution treatment + 760~815°C Air cooling ≥950 Rp0.2: ≥580 ≥8 ≥10 -
Steel Room Temperature Solution treatment ≤380
sample Solution treatment + Aging High temperature short-term tensile strength 650 High temperature short-term yield strength 350
sample Solution treatment + Aging High Temperature Short-Term Tensile Strength 600 High-temperature short-term yield strength 330
sample Solution treatment + Aging High Temperature Short-Term Tensile Strength 550 High-temperature short-term yield strength 300
sample Solution treatment + Aging High Temperature Short-Term Tensile Strength 500 High-temperature short-term yield strength 270
sample Solution treatment + Aging High temperature short-term tensile strength 450 High temperature short-term yield strength 250
sample Solution treatment + Aging High-temperature short-term tensile strength 370 High-temperature short-term yield strength 230
sample Solution treatment + Aging High Temperature Short-Term Tensile Strength 300 High-temperature short-term yield strength 200
1 Approximate Comparison Table Austenitic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia United Kingdom
GB ISC CNS JIS KS UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
53Cr21Mn9Ni4N
(5Cr21Mn9Ni4N) 		S35650 SUH 35 SUH 35 STR 35 S63008 X53CrMnNiN 21-9 X53CrMnNiN 21-9 1.4871 Z52CMN 21-09 X53CrMnNiN 21-9 1.4871 55Х20Г9AН4 349S52
2 Approximate Comparison Table Valve Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia United Kingdom
GB ISC CNS JIS KS Commercial Grade UNS SAE ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
53Cr21Mn9Ni4N
(5Cr21Mn9Ni4N) 		S35650 35 SUH 35 STR 35 21-4N S63008 EV8 X53CrMnNiN 21-9 ~ X53CrMnNiN 21-9 1.4871 Z53CMN 21-09Az X53CrMnNiN 21-9 1.4871 55Х20Г9АН4 349S52
53Cr21Mn9Ni4N Corresponding Standards(Same grade name, different standards)
1 GB /T 20878-2007
53Cr21Mn9Ni4N S35650 (5Cr21Mn9Ni4N)
2 GB /T 1221-2007
53Cr21Mn9Ni4N S35650 (5Cr21Mn9Ni4N)
3 GB /T 12773-2021
53Cr21Mn9Ni4N 21-4N
4 GB /T 20878-2024
53Cr21Mn9Ni4N S35650 (5Cr21Mn9Ni4N)

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