20Cr25Ni20Si2 S31449 - GB /T 4240-2019

Grade	20Cr25Ni20Si2
China ISC	S31449
Corresponding Standard	GB /T 4240-2019 Stainless Steel Wires
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance

20Cr25Ni20Si2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni
Minimum Value	-	1.5	-	-	-	23	19
Maximum Value	0.25	3	2	0.045	0.03	26	22

20Cr25Ni20Si2 Mechanical Properties

diameter d mm	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
d=0.05~0.10	Soft Steel Wire 700~1000	Soft State Wire (Elongation after Break) ≥15
d>0.10~0.30	660~950	≥20
d>0.30~0.60	640~920	≥20
d>0.60~1.00	620~900	≥25
d>1.00~3.00	620~880	≥30
d>3.00~6.00	600~850	≥30
d>6.00~10.0	580~830	≥30
d>10.0~16.0	550~800	≥30

①soft - Wire is subjected to bright heat treatment, or after heat treatment, it undergoes pickling or similar processes to remove surface scale.
②Lightly drawn- Wire is drawn to finished dimensions with a small reduction in cross-section after heat treatment.
③Cold drawn - Wire undergoes conventional drawing after heat treatment, which is the process of forming at room temperature through methods such as die drawing or roll drawing.

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