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420
DSM
420
knife,blade,
420 stainless steel is actually a general term for a series of martensitic stainless steels. It is based on high-carbon chromium stainless steel and has hardenability, good wear resistance and corrosion resistance. It is widely used in knives, medical equipment, molds and other fields.
List of common types of 420 stainless steel
| Common Name | Specific brand | Features/Remarks |
| 420J1 | SUS420J1/X20Cr13/1.4021 | Good toughness, relatively low hardness, commonly used in scissors, knife handles, medical forceps, etc. |
| 420J2 | SUS420J2/X30Cr13/1.4028 | The hardness can reach HRC50 or above, commonly used in kitchen knives, scissors, surgical scalpels |
| 1.4034 | X46Cr13 | After heat treatment, the hardness can reach HRC55~58, suitable for cutting edge and anti-wear parts |
| 420U6 | - | It is usually used in the manufacture of knives, scissors and parts requiring high hardness and high wear resistance. |
| 1.4116 | 50Cr15MoV | After heat treatment, the hardness can reach HRC 56~58, meeting the high wear resistance requirements of kitchen knives, etc. |
6Cr13 | - | Excellent hardness and wear resistance, widely used in the razor industry |
| 7Cr13Mo | - | Excellent hardness and wear resistance, widely used in mid-to-high-end kitchen knives |
| 8Cr14MoV | - | Good corrosion resistance and wear resistance, widely used in high-end kitchen knives |
| 9Cr18MoV | - | Higher hardness, corrosion and wear resistance |
Chemical composition comparison
| Grade | C % | Si % | Mn % | P % | S % | Ni % | Cr % | Mo % | Other % |
| 420J1 | 0.16-0.25 | 1.00 | 1.00 | 0.040 | 0.030 | 0.60 | 12.00-14.00 | ||
| 420J2 | 0.26-0.35 | 1.00 | 1.00 | 0.040 | 0.030 | 0.60 | 12.00-14.00 | ||
| 1.4031 | 0.36-0.45 | 0.80 | 0.80 | 0.040 | 0.030 | 0.60 | 12.00-14.00 | ||
| 1.4034 | 0.43-0.50 | 1.00 | 1.00 | 0.040 | 0.015 | 12.50-14.50 | |||
| 420U6 | 0.13-0.25 | 1.00 | 1.00 | 0.040 | 0.030 | 0.60 | 13.00-14.50 | N:0.06-0.15 | |
| 1.4116 | 0.45-0.55 | 1.00 | 1.00 | 0.040 | 0.015 | 14.00-15.00 | 0.50-0.80 | V:0.10-0.20 | |
| 6Cr13 | 0.60-0.70 | 1.00 | 1.00 | 0.040 | 0.030 | 12.50-14.00 | |||
| 7Cr13Mo | 0.65-0.75 | 1.00 | 1.00 | 0.040 | 0.030 | 12.50-14.00 | 0.05-1.0 | V:0.05-0.20 | |
| 8Cr14MoV | 0.75-0.80 | 0.80 | 0.20-0.80 | 0.030 | 0.040 | 13.50-14.50 | 0.40-0.50 | V:0.10-0.30 | |
| 9Cr18MoV | 0.95-1.10 | 0.80 | 0.80 | 0.040 | 0.030 | 0.60 | 16.00-18.00 | 0.40-0.70 |
Mechanical Properties
Grade | Yield strength Mpa Min | Tensile strength Mpa Min | Elongation Min/% | Hardness |
A50 | HV(Max) | |||
20Cr13 | 225 | 520 | 18 | 234 |
420u6 | 225 | 520 | 18 | 234 |
30Cr13 | 225 | 540 | 18 | 247 |
40Cr13 | 225 | 590 | 15 | |
X46Cr13 | 205 | MAX780 | 12 | 245 |
50Cr15MoV | 850 | 12 | 280 | |
6Cr13 | 540 | 15 |
420 Stainless Steel Series Comparison
| Grade | HRC | Key Features | Application |
| 420J1 | 48-52 | Good toughness, easy processing, good polishing | Cutlery, medical equipment, scissors |
| 420J2 | 50-55 | Corrosion resistant, moderate hardness, high cost performance | Kitchen knives, scissors, daily knives |
| 1.4031 | 48-54 | Good corrosion resistance, excellent polishability | Knife, scissors and kitchen supplies |
| 1.4034 | 56-58 | High hardness, high wear resistance, strong edge retention | High-end knives, utility knives, scissors |
| 420U6 | 54-56 | More stable processing performance, upgraded corrosion resistance | Precision knives, military and police supplies |
| 1.4116 | 56-58 | Balanced performance, corrosion resistance and durability | Mid-to-high-end kitchen knives and razors |
| 6Cr13 | 56-58 | High hardness and good wear resistance | Razor blades, surgical blades |
| 7Cr13Mo | 55-58 | Good corrosion resistance, good strength, strong cutting force | Field knives, utility knives, kitchen knives |
| 8Cr14MoV | 56-58 | Improved wear resistance, sharp and long-lasting | Kitchen knives, outdoor knives, industrial knives |
| 9Cr18MoV | 58-60 | High hardness, excellent corrosion resistance, high-end applications | Medical knives, high-end kitchen knives, utility knives |
Specifications
Table 1 Thickness Tolerance（mm）
Thickness Range (mm) | Thickness Tolerance （mm） |
0.074-0.2 | ±0.008 |
0.21-0.3 | ±0.015 |
0.3-0.8 | ±0.01 |
0.8-2.0 | ±0.02 |
2.0-3.0 | ±0.035 |
3.0-4.0 | ±0.05 |
Table 2 Width Tolerance
Width Range （mm） | Tolerance （mm） |
30-100 | ±0.1 |
100-600 | ±0.2 |
1219 | ±1 |
Surface & Edge
Surface：2B、HT、 NO.1、Black，
Edge：slit、mill
Coil Parameters
Inside diameter：280mm、300mm、400mm、500mm
Outside diameter：1400mm（Max）
Standard Packaging Solution
1. Multi-layer protection: Anti-rust, moisture-proof, dust-proof, pressure-resistant, collision-proof and scratch-proof, fully protecting coils during transportation
2.Structural design: Wood spacers between coils for convenient storage and handling
3.Label management: Exclusive label attached to each coil, marking coil number, steel grade, dimension and net weight
4.Batch inspection: Test samples attached to each pallet for customer incoming inspection
Testing Equipment & Qualification
Microhardness tester, Rockwell hardness tester, electronic universal tensile testing machine, metallographic microscope, carbon-sulfur analyzer, imported scanning electron microscope (SEM), imported roughness tester, salt spray test chamber, tubular heat treatment furnace
Certifications：ISO9001 Quality Management System、 ISO14001 Environmental Management System、ISO45001 Occupational Health & Safety Management System、IATF16949 Automotive Quality Certification
