Stainless steel bar

Stainless steel bar

Stainless steel bar is a material made by hot rolling or forging stainless steel ingots. According to different classification standards, stainless steel bars can be divided into many types.
Round steel, square steel, flat steel, hexagonal steel and octagonal steel are collectively referred to as stainless steel bars.

Specifications and materials
Stainless steel bar specifications: hot-rolled and forged stainless steel bars with a size (diameter, side length, thickness or distance between opposite sides) not exceeding 250mm, Ø1.0MM or above and Ø250MM or below.
Stainless steel bar materials: 304, 304L, 321, 316, 316L, 310S, 630, 1Cr13, 2Cr13, 3Cr13, 1Cr17Ni2, duplex steel, antibacterial steel and other materials! [1]
Application scope
Stainless steel bars have broad application prospects and are widely used in hardware and kitchenware, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, construction and decoration, nuclear power, aerospace, military industry and other industries! Equipment for seawater, chemical, dye, papermaking, oxalic acid, fertilizer and other production equipment; food industry, coastal facilities, ropes, CD rods, bolts, nuts.
Quality management: ISO9001:2000 quality management system certification, production license, etc.!
Note: Stainless steel bars of various materials and specifications can be customized.
Material, application range, quality management introduction of stainless steel bars
Material: 304, 304L, 321, 316, 316L, 310S, 630,
Common materials are 201, 202, 301, 304, 303, 316, 316L, 304L, 321, 2520, 1Cr13, 2Cr13, 3Cr13, duplex steel, antibacterial steel and other materials! Etc. Specifications are expressed by diameter, such as “50″ means round steel with a diameter of 50 mm. Round steel is divided into three types: hot rolling, forging and cold drawing. The specifications of hot-rolled round steel are 5.5-250 mm.
Application range: petroleum, electronics, chemicals, medicine, textiles, food, machinery, construction, nuclear power, aerospace, military industry and other industries!
Quality management: ISO9001:2000 quality management system certification, production license, etc.!
Production process
Stainless steel bars can be divided into three types according to the production process: hot rolling, forging and cold drawing. The specifications of hot-rolled stainless steel round steel are 5.5-250 mm. Among them: 5.5-25 mm small stainless steel round steel is mostly supplied in bundles of straight bars, often used as steel bars, bolts and various mechanical parts; stainless steel round steel larger than 25 mm is mainly used to manufacture mechanical parts or as seamless steel pipe blanks.
Implementation standards
National standard for stainless steel bars: GB/T14975-2002, GB/T14976-2002, GB/T13296-91
American standard: ASTM A484/A484M, ASTM A213/213A, ASTM A269/269M
Classification
According to the composition, it can be divided into Cr series (SUS400), Cr-Ni series (SUS300), Cr-Mn-Ni (SUS200) and precipitation hardening series (SUS600).
200 series—Chromium-nickel-manganese austenitic stainless steel
300 series—Chromium-nickel austenitic stainless steel
301—Good ductility, used for molded products. It can also be hardened by machine speed. Good weldability. Wear resistance and fatigue strength are better than 304 stainless steel.
302—Corrosion resistance is the same as 304, but the strength is better due to the relatively high carbon content.
303—It is made easier to cut by adding a small amount of sulfur and phosphorus.
304—18/8 stainless steel. GB grade is 06Cr19Ni10.
309—Better heat resistance than 304.
316—After 304, the second most widely used steel, mainly used in the food industry and surgical equipment, adding molybdenum to obtain a special corrosion-resistant structure. Because it has better chloride corrosion resistance than 304, it is also used as “marine steel”. SS316 is usually used in nuclear fuel recovery devices. 18/10 grade stainless steel usually also meets this application level.
Model 321—Except that the risk of material weld corrosion is reduced by the addition of titanium, other properties are similar to 304.
400 series—ferritic and martensitic stainless steel
408—Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
409—The cheapest model (UK and US), usually used as automobile exhaust pipes, belongs to ferritic stainless steel (chrome steel).
410—Martensite (high-strength chrome steel), good wear resistance, poor corrosion resistance.
416—Sulfur is added to improve the processing properties of the material.
420—”Tool grade” martensitic steel, similar to Brinell high chromium steel, the earliest stainless steel. Also used for surgical knives, can be made very bright.
430—Ferritic stainless steel, decorative, such as for car accessories. Good formability, but poor temperature resistance and corrosion resistance.
440—High-strength tool steel, slightly higher carbon content, can obtain higher yield strength after proper heat treatment, hardness can reach 58HRC, belongs to the hardest stainless steel. The most common application example is “razor blade”. There are three commonly used models: 440A, 440B, 440C, and 440F (easy to process).
500 Series—Heat-resistant chromium alloy steel.
600 Series—Martensitic precipitation hardening stainless steel.
630—The most commonly used precipitation hardening stainless steel type, also commonly called 17-4; 17% Cr, 4% Ni.