Ningbo Huali Steel Co., Ltd is a renowned supplier of hardened stainless steel strip in China, specializing cold-rolled stainless steel coils/strips/sheet. Materials grades like 301,304,410,420,17-4PH. Hardness range include 1/2H, 3/4H, FH, EH, SHE. Your trusted friend in China, Ningbo Huali Steel.
Hardened stainless steel strip refers to stainless steel materials that have not been annealed or have only been incompletely annealed after cold working (such as cold rolling, cold drawing, etc. ). Its internal structure retains the deformation structure produced by cold working, and has high strength, hardness and wear resistance, but relatively low plasticity and toughness. The main characteristics of hard stainless steel are high strength and hardness, wear resistance, low plasticity, magnetism, corrosion resistance, etc. Hardened stainless steel strip exists in austenitic, martensitic, precipitation hardening and other types of stainless steel. For example, austenitic 301, 304, etc., are significantly strengthened after cold working, but the corrosion resistance needs to be restored by solution treatment. Martensitic stainless steels such as 410 and 420 can be used directly after cold working, and have high hardness and strength. 17-4PH precipitation hardening steel requires aging treatment after cold working to further improve strength.
| GRADE | Chemical Composition | ||||||
| C | Si | Mn | P | S | Ni | Cr | |
| % | % | % | % | % | % | % | |
| 301 | ≤0.15 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 6.00/8.00 | 16.00/18.00 |
| GRADE | Chemical Composition | ||||||
| C | Si | Mn | P | S | Ni | Cr | |
| % | % | % | % | % | % | % | |
| 304 | ≤0.08 | ≤1.0 | ≤2.00 | ≤0.045 | ≤0.030 | 8.00/10.50 | 18.00/20.00 |
| GRADE | Chemical Composition | ||||||
| C | Si | Mn | P | S | Ni | Cr | |
| % | % | % | % | % | % | % | |
| 420 | 0.16/0.25 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | ≤0.75 | 12.0/14.0 |
| GRADE | Chemical Composition | |||||
| C | Si | Mn | P | S | Ni | |
| % | % | % | % | % | % | |
| 17-4 | ≤0.07 | ≤1.00 | ≤1.00 | ≤0.035 | ≤0.030 | 3.00/5.00 |
The high strength and hardness of hardened stainless steel strip refer to the deformation of grains caused by cold working, the increase of dislocation density, and the significant improvement of material strength, with the hardness reaching 2-3 times that of the annealed state. Its surface hardness is high, making it suitable for manufacturing wear-resistant parts, such as bearings and springs. The low plasticity of hardened stainless steel strip refers to the increased brittleness of the material caused by cold working, poor formability, and the need for adjustment through intermediate annealing. Austenitic stainless steel may exhibit weak magnetism in the hard state due to deformation-induced martensitic phase transformation. The corrosion resistance of hardened stainless steel strip is slightly lower than that of the annealed state, because cold working may introduce internal stress, which needs to be restored through solid solution treatment. Therefore, hardened stainless steel strip has excellent high strength, high hardness, and wear resistance, but its disadvantages are low plasticity, severe work hardening, and easy cracking.
Hardened stainless steel strip is widely used in fields with strict requirements on material performance due to its high strength, high hardness and excellent wear resistance. In mechanical manufacturing, it is often used to manufacture high-strength bolts, springs, bearings and other components to improve equipment reliability and service life; in the automotive industry, it is used in key structures such as engine fasteners and drive shafts to meet the dual needs of lightweight and high strength; in the field of electronics and electrical appliances, it is used as precision connectors and shrapnel materials to ensure the stability of signal transmission. In addition, hardened stainless steel also plays an important role in aerospace fasteners, corrosion-resistant tools for medical equipment, etc., and is an indispensable material choice in the field of high-end manufacturing.
Hardened stainless steel strip in Ningbo Huali Steel include 301, 304, 410, 420, 17-4PH.
Take 301 as an example, its hardness range includes ANN, 1/2H, 3/4H, FH, EH, SHE. The 301 produced by Ningbo Huali Steel has a maximum hardness of more than 530HV and a tensile strength of more than 1740 Rm. And it can be absolutely flat. It is one of the most suitable raw materials for stainless steel scrapers.
Ningbo Huali Steel has introduced advanced machinery from abroad, equipping its production lines with top-tier manufacturing equipment.
The American imported twenty series Sendzimir high precision reversible mill is capable of speeds up to 650 m/min, with automatic series proportioning, and is equipped with an AGC automatic downward deflection correction system that ensures that overall tolerances are maintained to within ± 0. 002 mm.
Twenty-three rolls tension leveler with automatic online surface inspection, defects alarm, and remote defects record function to ensure accurate production process and instant record of status.
Used to clean oil and other stains from the surface of hardened stainless steel strip to send them to the annealing furnace or factory.
As for packaging, we offer standard packaging (waterproof paper and steel belt packing) and wooden box packaging, as well as customized packaging solutions tailored to our clients' specific requirements.
Our dedicated loading team ensures meticulous handling of every shipment. Each container is securely reinforced with wood and wire rope to guarantee that your goods (hardened stainless steel strip) arrive in safe condition.
