316L Stainless Steel Bar

Stainless steel round steel belongs to a class of long material, but also belongs to a class of bars, the so-called stainless steel round steel refers to the cross section of uniform round long material, generally about 4 meters long. It can be divided into light circles and black rods. The so-called light round, refers to the smooth surface, after quasi-rolling treatment; and the so-called black rod, refers to the surface of the black rough, directly hot rolled.

Introduction

Stainless steel round steel refers to a solid strip of steel with a circular cross-section. Its specifications are expressed in millimeters of diameter, such as "50", which means a stainless steel round steel with a diameter of 50mm.

Common materials are 301, 304, 303, 316, 316L, 304L, 321, 2520, 201, 202, etc. The specifications are expressed in diameter, such as "50", which means round steel with a diameter of 50mm. Round steel is divided into hot rolled, forged and cold drawn three. The specification of hot-rolled round steel is 5.5-250mm.

Stainless steel round steel has broad application prospects and is widely used in hardware kitchenware, shipbuilding, petrochemical, machinery, medicine, food, electric power, energy, aerospace, etc., building decoration. Seawater equipment, chemical, dye, paper, oxalic acid, fertilizer and other production equipment; photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.

Type Properties

Stainless steel round steel according to the production process can be divided into hot rolled, forged and cold drawn three. The specification of hot-rolled stainless steel round steel is 5.5-250mm. Among them, 5.5-25mm small stainless steel round steel is mostly supplied in bundles of straight bars and is commonly used as steel bars, bolts and various mechanical parts. Stainless steel round steel larger than 25mm is mainly used for manufacturing mechanical parts or seamless steel pipe blanks.

According to the material

1.310S stainless steel round steel

Features: 310S stainless steel is austenitic chromium-nickel stainless steel with good oxidation resistance and corrosion resistance. Because of the high percentage of chromium and nickel, 310S has much better creep strength, can continue to work at high temperatures, and has good high temperature resistance.

2.316L stainless steel round steel

Features:

1) The appearance of cold-rolled products is good and beautiful;

2) Due to the addition of Mo, the corrosion resistance, especially the pitting corrosion resistance, is excellent;

3) Excellent high temperature strength;

4) Excellent processing hardenability (weak magnetism after processing)

5) Non-magnetic in solid solution state;

3.316 stainless steel round steel

Features: 316 stainless steel is the second most widely used steel after 304. It is mainly used in the food industry and surgical equipment. Due to the addition of Mo, its corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good. It can be used under harsh conditions; excellent processing hardening (non-magnetic).

4.321 stainless steel round steel

Features: Ti element is added to 304 steel to prevent grain boundary corrosion, suitable for use at 430 ℃-900 ℃. Except that the risk of corrosion of the weld seam of the material is reduced due to the addition of titanium, other properties are similar to 304

5.304L Stainless Steel Round Steel

Performance: 304L stainless steel round steel is a variant of 304 stainless steel with low carbon content, which is used for welding occasions. The lower carbon content minimizes the precipitation of carbides in the heat affected zone near the weld, which can lead to intergranular corrosion (weld erosion) of the stainless steel in some environments.

6.304 stainless steel round steel

Features: 304 stainless steel is the 1 most widely used chromium-nickel stainless steel, with good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Corrosion resistance in the atmosphere, if it is an industrial atmosphere or a heavily polluted area, it needs to be cleaned in time to avoid corrosion

Corrosion

The dust particles attached to the surface can promote the corrosion of stainless steel. When there are dust particles on the surface, a gap is formed where the dust particles are deposited, and the water film containing chloride ions is easily maintained, which hinders the supplement of oxygen and leads to the destruction of the passivation film. In addition, this dissolution zone and the passivation zone adjacent to the deposition of dust particles will form an occlusive cell that exacerbates the formation and development of pitting pits.

oxidation treatment

(1) sandblasting (pill) method: mainly using the method of spraying micro glass beads to remove the black oxide skin on the surface.

(2) Chemical method: the use of 1 kinds of pollution-free pickling passivation paste and room temperature non-toxic cleaning liquid with inorganic additives for leaching. So as to achieve the purpose of whitening treatment of stainless steel. After treatment, it basically looks like a dull color. This method is more suitable for large and complex products.