Stainless Steel Round Bar
Stainless steel is a production which not easy rust,acid resistance and corrosion resistance,so it is widely used in light industry,heavy industry,daily necessities and the decoration industry. As a professional manufacturer, we can manufacture various sizes of stainless steel bars with highest quality and lowest price , SMC can be trusted.
Features of Stainless Steel Round Bar:
a) The appearance of cold-rolled products gloss is good, beautiful;
b) Excellent high temperature strength;
c) Excellent work-hardening (after processing weakly magnetic)
d) Non-magnetic state solution
Specifications of Stainless Steel Round Bar:
1. Standard: GB ASTM, JIS, etc
2. Grade: 200,300,400series
3. Diameter: 2mm-300mm
4. Shape Manufactured: round
5. Length: 2-6m or as customers' request
6. Surface finish: 2B, BA, Hair Line, No.1, No.4, Mirror Finish
7. Manufacture technology: cold drawn/cold rolled/hot rolled
Dimensions of Stainless Steel Round Bar
Surface Condition:
hot-rolled, pickled, cold-drawn, straightening, polish, peeling, grinding.
Hardness: hard, half hard, soft, according to customer’s request.
Dimensions:
Hot-rolled, pickled: Φ5.5-Φ110mm
Cold-drawn bright: Φ2-Φ50mm
Centerless Bright: Φ40-Φ300mm
Applications of Stainless Steel Bar:
1). Construction field, ships building industry
2). Petroleum & chemical industries, war and electricity industries
3). Food processing and medical industry
4). Boiler heat exchanger, machinery and hardware fields
Manufacturing Process of Stainless Steel Bar:
How Bar is made
From a world-class melt shop to the most modern finishing operation in the industry, SMC produces the widest variety of high quality stainless steel bar products in the broadest array of shapes and sizes.
There can be significant differences in bar manufacturing for each shape and size range produced. The following illustrates our process in manufacturing round bar.
Mine-to-Mill
SMC gains a considerable cost advantage in internal logistics and energy savings through our mine-to-mill production chain. Our fully-integrated facility combines chromium mining, ferrochrome production and stainless steel melting in one location.
Melting
Stainless steel is one of the world’s most recycled materials, with some 90% of each new batch - or heat - coming from scrap. At SMC melt shops, we use electric arc melting, sophisticated AOD/CLU refining and a specialized ladle treatment that adds additional alloy elements to the steel at precise amounts and temperatures. The high-quality refining and ladling is essential for the downstream production of special grades and our highly machine able bar.
Casting
SMC utilizes a continuous casting process for creating billets (generally 5 1/2” to 6”) and blooms (generally 12” x 16”). Multiple sizes of ingots are individually molded (generally 30”).
Rolling / Forging
In our facilities, hot rolls rod in coil for making small bar less than or equal to 1”, and hot rolls bar in straight lengths from 1” to 7” diameter, utilizing up to 16 continuous rolling stands. SMC also has the capability to press forge the cast steel into a rolled product ready to finish.
Process Annealing
Annealing recrystalilizes the stainless steels internal structure, which is altered in the rolling process. Depending upon bar grades, the high speed of rolling mills allows steel to remain at annealing temperature while being rolled. It is then quenched to achieve annealing. For certain cold finishing operations, annealing and pickling are performed separately at a number of mills.
Finishing
Utilizing the newest Coil-to-Bar and Bar-to-Bar Finishing Cells, the mill finishes rod in coil from 3/16” to 1” diameter and up to 24 feet; and bar-to-bar in large size ranges from 3/4” to 4” diameter peeled and polished up to 24 feet. SMC has the capability to produce round bar straightened, peeled and polished. We also offer drawn product from annealed/pickled rod.
Testing / Packing
Our computer system automatically checks the finished bar to all industry and customer standards before the order can be processed for shipment. Once an order has been shipped, customers can print out the corresponding Certificate of Test from our extranet site.
Technical notes:
Stainless Steel Chemical Composition
| Grade and Main chemical composition% | |||||||||
| C | Si | Mn | P≤ | S≤ | Cr | Mo | Ni | Other | |
| 201 | ≤0.15 | ≤1.00 | 5.5-7.5 | 0.06 | 0.03 | 16-18 | - | 3.5-5.5 | N≤0.25 |
| 202 | ≤0.15 | ≤1.00 | 7.5-10.0 | 0.06 | 0.03 | 17-19 | - | 4.0-6.0 | N≤0.25 |
| 301 | ≤0.15 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 16-18 | - | 6.0-8.0 | - |
| 302 | ≤0.15 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 17-19 | - | 8-10.0 | - |
| 303 | ≤0.15 | ≤1.00 | ≤2.00 | 0.2 | ≥0.015 | 17-19 | ≤0.6 | 8.0-10.0 | - |
| 304 | ≤0.08 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 18-20 | - | 8-10.5 | - |
| 304L | ≤0.03 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 18-20 | - | 9-13 | - |
| 305 | ≤0.12 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 17-19 | - | 10.5-13 | - |
| 309S | ≤0.08 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 22-24 | - | 12-15 | - |
| 310S | ≤0.08 | ≤1.5 | ≤2.00 | 0.045 | 0.03 | 24-26 | - | 19-22 | - |
| 316 | ≤0.08 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 16-18 | 2-3 | 10-14 | - |
| 316L | ≤0.03 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 16-18 | 2-3 | 12-15 | - |
| 317 | ≤0.08 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 18-20 | 3-4 | 11-15 | - |
| 317L | ≤0.03 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 18-20 | 3-4 | 11-15 | - |
| 321 | ≤0.08 | ≤1.00 | ≤2.00 | 0.045 | 0.03 | 17-19 | - | 9-13 | Ti≥5×C |
| 405 | ≤0.08 | ≤1.00 | ≤1.00 | 0.04 | 0.03 | 11.5-14.5 | - | ≤0.6 | AL0.1-0.3 |
| 420F | 0.26-0.4 | ≤1.00 | ≤1.25 | 0.06 | ≥0.15 | 12-14 | ≤0.6 | ≤0.6 | - |
| 430 | ≤0.12 | ≤0.75 | ≤1.00 | 0.04 | 0.03 | 16-18 | - | ≤0.6 | |
Mechanical properties
| Classification | Mechanical Properties | ||||||||
| USA | Tensile test (Min) | Hardness (Max) | |||||||
| AISI | Yield Strength | Tensile Strength | Elongation | HB | HRB | HV | |||
| kg/mm2 | N/mm2 | kgf/mm2 | N/mm2 | ||||||
| Austenite | 301 | 21 | 206 | 53 | 520 | 40 | 187 | 90 | 200 |
| 304 | 21 | 206 | 53 | 520 | 40 | 187 | 90 | 200 | |
| 304L | 18 | 177 | 49 | 481 | 40 | 187 | 90 | 200 | |
| 305 | 18 | 177 | 49 | 481 | 40 | 187 | 90 | 200 | |
| 310S | 21 | 206 | 53 | 520 | 40 | 187 | 90 | 200 | |
| 316 | 21 | 206 | 53 | 520 | 40 | 187 | 90 | 200 | |
| 316L | 18 | 177 | 49 | 481 | 40 | 187 | 90 | 200 | |
| Ferrite | 430 | 21 | 206 | 46 | 451 | 22 | 183 | 88 | 200 |
| 434 | 21 | 206 | 46 | 451 | 22 | 183 | 88 | 200 | |
| Martensite | 410 | 21 | 206 | 45 | 441 | 20 | 200 | 93 | 210 |
| 420 | 23 | 226 | 53 | 520 | 18 | 223 | 97 | 234 | |
| 420 | 23 | 226 | 55 | 539 | 18 | 235 | 99 | 247 | |
Surface finish | Characteristics and application |
No.2B | The surface brightness and flatness of no2B is better than no2D. then through a special surface treatment to improve its mechanical properties,No2B could nearly satisfy comprehensive uses. |
No.3 | Polished with abrasive belt of git#100-#200, have better brightness with discontinuous coarse stria, used as inner and external ornaments for building, electrical appliances and kitchen utensils etc. |
No.4 | Polished with abrasive belt of grit #150-#180,have better brightness with discontinuous coarse stria, but thinner than No3, are used as bathtub buildings inner and external ornaments electrical appliances kitchen utensils and food processing equipment etc. |
HL | Polished with abrasive belt of grit #150-#320 on the NO.4 finish and has continuous streaks, mainly used as buildings ornaments elevators, door of building, frontal plate etc. |
BA | Cold rolled, bright annealed and skin-passed, the product have excellent brightness and good reflexivity like mirror, kitchen apparatus, ornament etc. |
8K | The product have excellent brightness and prefer reflexivity can to be the mirror. |
SMC's promise:
As the word leading manufacturer and supplier, Shanghai Metal Corporation makes“Service,Management,Craftsmanship." In our commitment to deliver world class service, SMC's Quality Control Department not only promise to provide the best quality products, excellent customer services, fast and reliable deliveries, and reasonable prices; but also goes the extra step to provide environment conscious products that will improve lives.
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