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420J2
DSM
1.4028
420
SUS420J2
30Cr13
Higher hardness than 20Cr13 after quenching, used for cutting tools, nozzles, valve seats, valves, etc
420J2 stainless steel is a martensitic stainless steel that is part of the 400 series. Martensitic stainless steels are characterized by their high hardness, excellent strength, and good corrosion resistance in certain environments. The "J2" designation indicates that it is a variant of 420 stainless steel.
Chemical Composition
| C≤% | Si≤% | Mn≤% | P≤% | S≤% | Cr % | Ni≤% |
| 0.26-0.35 | 1.00 | 1.00 | 0.040 | 0.030 | 12.00-14.00 | 0.60 |
Mechanical properties
| T.S. min | Y.S. min | EL min% | HARDNESS( max) | ||
| Mpa | Mpa | 50mm | HBW | HRB | HV |
| 540 | 225 | 18 | 235 | 99 | 247 |
Application
Knives: Household scissors, Kitchen knives, Manicure tools: nail clippers, pliers, etc.
Medical devices (non-surgical): Surgical forceps, tweezers and other simple instruments, Dental tools, Medical auxiliary bracket parts
Mechanical structural parts (medium and low strength): Washers, Screws and nuts (not used for high-strength connections), Instrument housings and shields
Cutlery, table knives
Textile healds
Does 420J2 stainless steel need heat treatment when used as knives?
420J2 stainless steel usually needs heat treatment when used as knives, otherwise its hardness and cutting performance will not meet actual needs. Only after quenching + tempering heat treatment can its martensitic structure be stimulated and the hardness be increased to 48~55HRC (depending on the specific processing process) to be competent for lightweight knife use.
| Process | Process parameters | Description |
| Annealing | 790~840℃, slow cooling | Used to soften the material for easier processing |
| Quenching | 980~1050℃ heating, oil cooling or air cooling | Forming martensite and increasing hardness |
| Tempering | 150~250℃ | Reduce quenching stress, stabilize structure, adjust hardness and toughness Razor blades (external blade net) |
Supply size
| Precision stainless steel strip | Re-rolling stainless steel coil & sheet | ||||||
| Thickness | 0.08-1.2mm | Thickness | 0.6-3.0mm | ||||
| Rolling width | 450-680mm | Rolling Width | 550-680mm | ||||
| Slitting width | 5-680mm(We can slitting for you as per your required width,but if you need some special width such as 400mm coil the remaining 280mm you also need to purchase which can not sale to other clients) | Slitting width | 25-680mm(We can slitting for you as per your required width,but if you need some special width such as 400mm coil the remaining 280mm you also need to purchase which can not sale to other clients) | ||||
| Length | coil or as per requirement. | Length | as per requirement | ||||
| Surface | 2B | Surface | 2B | ||||
| Original | DSM | Standard | Produce as per your requirement. | ||||
| Standard | Produce as per your requirement. | MOQ for coil | 5mt or as per coil actual weight | ||||
| MOQ | 3mt or as per coil actual weight | MOQ for sheet | 5 Pcs | ||||
| Hot rolled stainless steel coil & sheet | Cold rolled stainless steel coil & sheet | ||||||
| Thickness | 3.0-6.0mm | Thickness | 0.6-3.0 mm | ||||
| Width | 1219 | Width | 10,001,219 | ||||
| Length | coil or as per requirement. | Length | coil or as per requirement. | ||||
| Surface | No.1 1D | Surface | 2B | ||||
| Original | TISCO | Original | TISCO | ||||
| Standard | GB/T4237-2015 JIS G4304 | Standard | GB/T3280-2007 JIS G4305 | ||||
| MOQ for coil | 13mt or as per coil actual weight | MOQ for coil | 5mt or as per coil actual weight | ||||
| MOQ for sheet | 5 Pcs | MOQ for sheet | 5 Pcs | ||||
420J2 stainless steel is a martensitic stainless steel that is part of the 400 series. Martensitic stainless steels are characterized by their high hardness, excellent strength, and good corrosion resistance in certain environments. The "J2" designation indicates that it is a variant of 420 stainless steel.
Chemical Composition
| C≤% | Si≤% | Mn≤% | P≤% | S≤% | Cr % | Ni≤% |
| 0.26-0.35 | 1.00 | 1.00 | 0.040 | 0.030 | 12.00-14.00 | 0.60 |
Mechanical properties
| T.S. min | Y.S. min | EL min% | HARDNESS( max) | ||
| Mpa | Mpa | 50mm | HBW | HRB | HV |
| 540 | 225 | 18 | 235 | 99 | 247 |
Application
Knives: Household scissors, Kitchen knives, Manicure tools: nail clippers, pliers, etc.
Medical devices (non-surgical): Surgical forceps, tweezers and other simple instruments, Dental tools, Medical auxiliary bracket parts
Mechanical structural parts (medium and low strength): Washers, Screws and nuts (not used for high-strength connections), Instrument housings and shields
Cutlery, table knives
Textile healds
Does 420J2 stainless steel need heat treatment when used as knives?
420J2 stainless steel usually needs heat treatment when used as knives, otherwise its hardness and cutting performance will not meet actual needs. Only after quenching + tempering heat treatment can its martensitic structure be stimulated and the hardness be increased to 48~55HRC (depending on the specific processing process) to be competent for lightweight knife use.
| Process | Process parameters | Description |
| Annealing | 790~840℃, slow cooling | Used to soften the material for easier processing |
| Quenching | 980~1050℃ heating, oil cooling or air cooling | Forming martensite and increasing hardness |
| Tempering | 150~250℃ | Reduce quenching stress, stabilize structure, adjust hardness and toughness Razor blades (external blade net) |
Supply size
| Precision stainless steel strip | Re-rolling stainless steel coil & sheet | ||||||
| Thickness | 0.08-1.2mm | Thickness | 0.6-3.0mm | ||||
| Rolling width | 450-680mm | Rolling Width | 550-680mm | ||||
| Slitting width | 5-680mm(We can slitting for you as per your required width,but if you need some special width such as 400mm coil the remaining 280mm you also need to purchase which can not sale to other clients) | Slitting width | 25-680mm(We can slitting for you as per your required width,but if you need some special width such as 400mm coil the remaining 280mm you also need to purchase which can not sale to other clients) | ||||
| Length | coil or as per requirement. | Length | as per requirement | ||||
| Surface | 2B | Surface | 2B | ||||
| Original | DSM | Standard | Produce as per your requirement. | ||||
| Standard | Produce as per your requirement. | MOQ for coil | 5mt or as per coil actual weight | ||||
| MOQ | 3mt or as per coil actual weight | MOQ for sheet | 5 Pcs | ||||
| Hot rolled stainless steel coil & sheet | Cold rolled stainless steel coil & sheet | ||||||
| Thickness | 3.0-6.0mm | Thickness | 0.6-3.0 mm | ||||
| Width | 1219 | Width | 10,001,219 | ||||
| Length | coil or as per requirement. | Length | coil or as per requirement. | ||||
| Surface | No.1 1D | Surface | 2B | ||||
| Original | TISCO | Original | TISCO | ||||
| Standard | GB/T4237-2015 JIS G4304 | Standard | GB/T3280-2007 JIS G4305 | ||||
| MOQ for coil | 13mt or as per coil actual weight | MOQ for coil | 5mt or as per coil actual weight | ||||
| MOQ for sheet | 5 Pcs | MOQ for sheet | 5 Pcs | ||||
