20Cr2Ni4 - GB /T 17107-1997

Grade	20Cr2Ni4
Corresponding Standard	GB /T 17107-1997 Structural Steel Grades And Mechanical Property For Forgings
Classification	Alloy Steel

20Cr2Ni4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.17	0.17	0.3	-	-	1.25	3.25	-
Maximum Value	0.23	0.37	0.6	0.035	0.035	1.65	3.65	0.3

• High-quality steel——P≤0.035；S≤0.035；Cu≤0.3；Cr≤0.3；Ni≤0.3
• Extra-quality steel （Suffix A）——P≤0.025；S≤0.025；Cu≤0.25；Cr≤0.3；Ni≤0.3
• Special High-Quality Steel (Suffix E)——P≤0.025；S≤0.015；Cu≤0.25；Cr≤0.3；Ni≤0.3

20Cr2Ni4 Mechanical Properties

diameter or thickness d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
Sample blank size d=15	Sample Direction: Longitudinal	Tempering	≥1175	≥1080	≥10	≥45	≥62

• The forgings must be inspected for mechanical properties after performance heat treatment and before any surface treatment.
• After the samples are removed, no heat treatments that affect the mechanical properties or any processing that influences the test results shall be conducted.
• Mechanical property testing primarily evaluates the material\'s tensile strength, impact resistance, and hardness. When conducting tensile, impact, and hardness tests simultaneously, the hardness value is for reference only. Alternatively, one may choose to perform only one of the tensile, impact, or hardness tests.

Approximate Comparison Table Structural Alloy Steel

China		Taiwan, China	Japan	South Korea	United States	Germany		France	Russia	United Kingdom
GB	ISC	CNS	JIS	KS	ASTM/AISI	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	BS EN/BS
20Cr2Ni4 18Cr2Ni4WA	A43202 A52183	≈SNC815	≈SNC815	≈SNC815	3316	~14NiCr14	1.5752	18NC13	20Х2Н4А 18Х2Н4ВА	~665M13

20Cr2Ni4 Corresponding Standards(Same grade name, different standards)

1	GB /T 3077-1999
	20Cr2Ni4 A43202
2	GB /T 17107-1997
	20Cr2Ni4
3	GB /T 3077-2015
	20Cr2Ni4 A43202
4	GB /T 3078-2019
	20Cr2Ni4
5	JB /T 6396-2006
	20Cr2Ni4

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