SUS420J2 is a martensitic stainless steel, utilized in a range of applications that require high strength, high hardness and corrosion resistance. After heat treatment, there are globalized carbides, and its good hardenability, high wear resistance, corrosion resistance, post-processing and surface hardening performance are suitable for some demanding mechanical parts, tools, medical devices and some special industrial applications.
| execution standard | ZEICIN Grade | GB | ASTM | JIS | DIN |
| GB | SUS420J2 | 3Cr13 | S42000/420 | SUS420J2 | X30Cr13/1.4028 |
| C | Cr | Mn | Si | Mo | V |
| 0.26~0.40 | 12.00~14.00 | ≤1.00 | ≤1.00 | – | – |
| Co | S | P | Ni | Nb | W |
| – | ≤0.030 | ≤0.040 | ≤0.60 | – | – |
Our company is a key enterprise of the “13th Five-Year Plan” project supervised by the Ministry of Science and Technology, so we have the backing of the national government and government funding.
In cooperation with Shanghai University and the Beijing Iron and Steel Research Institute, we developed a special rapid solidification electroslag resolver domestic process, making us a feature enterprise in martensitic stainless steel.
Our main products are high-performance stainless steel raw materials, which can guarantees the quantity and quality supply according to the demand of customers for purchasing. Quality is key; we provide stable, reliable material sourcing to allow your production operations to run smoothly.
To serve customers, we are sincere and approach honest!
Our products match the high-quality standards set by European, American and Japanese brands, using only premium materials that are up to international standards.
High cost performance, cost-effective products, better than European, American, and Japanese products.
We provide a flexible and customizable delivery schedule. Regular sizes get delivered on time, within 40 days.
Because we can offer you a high-performance counterpart with better dimensional precision and the lower cost, which help to enhance your production efficiency.
| Process | Temperature Range | Description |
| Annealing | 840~900℃ | Heat uniformly to the specified temperature and hold until temperature is uniform throughout. Soaking and cooling are required. |
| Heat Treatment | 730~790℃ | Heat uniformly to the specified temperature and hold until temperature is uniform throughout. |
| Hardening | 950~1020℃ | Heat uniformly to the specified temperature and hold until temperature is uniform throughout. Follow with oil quenching or air cooling, then temper slightly warm. |
| Steel Grade | Hard/Finish | Hardness （HV） | Tensile Strength （MPa-N/mm2） | Elongation （%） |
| SUS420J2 | Annealed | 150-200 | 540-655 | 20-30 |
| Full Hard | 280-320 | 880-1030 | 1-3 | |
| Quenching and Tempering | 450-550 | – | – |
SUS420J2 is oxidation and corrosion resistant, and has the highest corrosion resistance in the hardened state with surface grinding or polishing. Ideal in environments subject to humidity or corrosive conditions.
SUS420J2 stainless steel has good strength and hardness after quenching, depending on the carbon content and the size of the part, SUS420J2 can be heat-treated to 52HRC or higher.
SUS420J2 possesses nice workability after proper heat treatment.
SUS420J2 is able to produce sharp edges, and maintain them over time, making it a great choice for barber scissors.
Because of the high hardness and corrosion resistance of SUS420J2, the corrosion raindrops of the body can be prevented, so it is often used for surgical tools, such as scalpel, tweezers and so on.
Ideal for wear- and corrosion-resistance automotive parts and aerospace parts.
like gears, bearings and other high-strength end parts.
Can SUS420J2 be ordered in small quantities or at mass quantities?
Absolutely, we accept both small and large quantity orders. We produce our own chemicals which guarantees the supply of high-quality materials at the right time (especially for larger orders).
We can also do custom sizes and surface treatments?
Yes, as a raw material maker, we produce varieties of customized size for surface treatment, polishing, sand blasting and heat treatment.
How is the quality guarantee of SUS420J2?
SUS420J2 requires a variety of quality control measures to ensure that the end product is of the highest quality. All batches are tested for chemical composition, mechanical properties, etc., and the full material documentation is available at delivery.
