SUS420J2 Stainless Steel: High-Hardness Cutlery and Tool Grade

Type: Martensitic stainless steel.

Hardness: Achieves good hardness and strength after quenching and tempering, providing decent edge retention for knives.

Corrosion Resistance: Offers good resistance to rust and many chemicals, performing well in domestic and industrial settings.

Cost-Effective: A market leader due to its balanced properties and affordability.

Applications: Ideal for kitchen knives, scissors, surgical instruments, and even springs due to its strength.

Comparison: Softer and less wear-resistant than 440C but tougher and more corrosion-resistant; sits between 420J1 and 440C in performance.

In Summary:

If you need a steel that's sharp, corrosion-resistant, tough, and won't break the bank, 420J2 is a versatile choice, especially for everyday cutting tools.

 

Equivalent grade

Standard	USA		Europe	UK
Designation	UNS	AISI	EN	BS
SUS420J2	Ｓ42000	420	X30Cr13	420S45

 

Chemical Formula of SUS420J2 Stainless Steel

Designation	C	Si	Mn	P	S	Cr
SUS420J2	0.26～0.40	≦1.00	≦1.00	≦0.040	≦0.030	12.00～14.00

 

 

Mechanical properties

Designation	Finishing condition	Hardness	Tensile strength	Elongation
		HV	N/mm2	%
SUS420J2	Annealed	150～200	540～655	20～30
	Full hard	280～320	880～1030	1～3