At present, stainless steel can be divided into these categories according to the different materials: austenitic stainless steel, ferritic stainless steel martensitic stainless steel, austenitic ferritic duplex stainless steel. And according to the different shape can also be divided into various profiles and steel pipe.

Common models :200 series :201, 202, etc. 300 series :301, 304, 304J1(304 containing copper), 304L(304 low carbon), 309S, 310S, 316L, 321, etc. 400 series :405, 409L, 410S, 410, 420.430, 436L, 439, 441, 443, 444, etc

201 Stainless Steel American Standard (ASTM)201 National Standard (GB)1Cr17Mn6Ni5N Day Standard (SUS)

201

Properties: With acid resistance, alkali resistance, high density, polishing no bubbles, no pinholes and other characteristics, is the production of a variety of watchcase, watchband back cover high-quality materials

Uses: Mainly used for decorative pipe, industrial pipe, some shallow stretching products

202 Stainless steel

Properties: Replaced by Mn and part, so as to obtain good mechanical properties and corrosion resistance, is a new nickel-saving stainless steel, his room temperature strength is higher than 304, below 800 degrees has better oxidation resistance and medium temperature strength

Uses: Mainly used for decorative pipe, industrial pipe, some shallow stretching products.

2205 stainless steel

Properties: The interval of Cr, Mo and N elements is relatively narrow and easy to achieve the balance of the phase (that is, the two phases are about half), which improves the strength, corrosion resistance and welding performance of steel, and is mostly used for materials with high performance requirements and need to be welded, such as oil and gas pipelines

Uses: Used in oil refining, fertilizer, paper making, petroleum, chemical industry and other seawater resistant high temperature concentrated nitric acid heat exchanger and cold shower and devices.

304 stainless steel

Properties: As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Stamping bending and other hot processing good, no heat treatment hardening phenomenon (non-magnetic, use temperature -196C~800C).

Uses: food industry, household goods (1, 2 types of tableware, kitchen cabinets, indoor pipelines, water heaters, boilers, bath workers) drinking water pipeline, gas pipeline, tap water pipeline.

304J1 Stainless steel

Properties: Cu should be added, its formability, especially wire drawing and aging crack resistance is good, and can be formed in complex shapes. Its corrosion resistance is the same as 304 steel

Uses: Thermos bottle, kitchen sink, pot, pot, insulated lunch box, door handle, textile processing machine.

304L stainless steel

Properties: As a low-C 304 steel, in the general state, its corrosion resistance is similar to 304 steel, but after welding or stress relief, its grain boundary corrosion resistance is excellent. In the absence of heat treatment, it can also maintain good corrosion resistance, generally used below 400 (non-magnetic, use temperature -196C~800°C).

Application: It is used in chemical, coal and petroleum industry with high corrosion resistance, heat resistant parts of building materials and parts with difficulty in heat treatment

321 stainless steel

Properties: Add Ti element to 304 steel to prevent grain boundary corrosion. Suitable for use at 430C~900C temperature

316 stainless steel

Properties: Mo should be added, so its corrosion resistance, atmospheric corrosion resistance and high temperature strength is particularly good, can be used under the cool strip. Excellent work hardening (non-magnetic).

316L stainless steel

Properties: As the low C series of 316 steel, in addition to having the same characteristics as 316 steel, its resistance to grain boundary corrosion is excellent.

309S stainless steel

Properties :23Cr-13Ni high alloy steel stainless steel, excellent corrosion resistance and strength suitable for the working temperature of 1000 parts.

310S stainless steel

Properties: Good oxidation resistance, corrosion resistance, high temperature resistance, because of a higher percentage of chromium and nickel, 310S has much better creep strength, can continue to operate at high temperatures, with good high temperature resistance.

Stainless Steel 400 Series

409L stainless steel

Nature: cheapest model. Due to the addition of T element, its high temperature corrosion resistance and high temperature strength are good. It is a ferritic stainless steel (chromium steel).

410 stainless steel

Properties: The representative steel of martensitic steel, although high strength, but not suitable for use in a harsh corrosive environment. Its workability is good, and the heat treatment surface is hardened (magnetic).

410J1 Properties of stainless steel: high hardness after quenching, good corrosion resistance (magnetic)

420J2 stainless steel

Properties: After quenching, higher hardness than 420J1 steel (magnetic)

430 stainless steel

Properties: As a representative of ferritic steel, the thermal expansion rate is low, and the formability and oxidation resistance are excellent