Stainless Steel Round Bar

Stainless Steel Round Bar

Standard	ASTM,AISI,SUS,JIS,EN,DIN,BS,GB
Shape	Round, Square, Rectangle
Grade	201/202/304/309/309S/310/310S/304/304L/ 316/316L/316Ti/410/420/430
Diameter	1mm-300mm or as required
Length	As required
Container size	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM
Additional Services	Welding/Punching/Cutting/Bending/Decoiling
Package Details	Standard seaworthy package(protected by waterproof paper,wrapped in iron sheet, fixed by steel bars)

Description

Stainless steel round bar is widely used in machining, construction, automotive parts, fasteners, and industrial equipment manufacturing. One of the most important selection factors is material grade, because different stainless steel grades determine corrosion resistance, strength, machinability, and application range. Common stainless steel round bar grades mainly come from austenitic, ferritic, martensitic, and duplex families.

Austenitic Stainless Steel Grades

Austenitic grades are the most widely used stainless steel materials for round bars due to their excellent corrosion resistance and good formability.

304 / 304L: general-purpose grade, widely used in machinery and construction
316 / 316L: improved corrosion resistance, especially for marine and chemical environments
303: free-machining grade with added sulfur for better machining performance
321: titanium-stabilized grade for high-temperature applications
310 / 310S: high-temperature resistant grade for furnace and heat treatment parts

Ferritic Stainless Steel Grades

430: commonly used ferritic grade with good corrosion resistance in mild environments
439: improved weldability and corrosion resistance compared to 430
409: widely used in automotive exhaust systems
444: enhanced corrosion resistance with molybdenum addition

Martensitic Stainless Steel Grades

Martensitic stainless steels are known for high strength and hardness after heat treatment, making them suitable for wear-resistant and structural applications.

410: basic martensitic grade with good hardness
420: higher carbon content for improved wear resistance
431: improved corrosion resistance and toughness

Duplex Stainless Steel Grades

2205: most common duplex grade with high strength and corrosion resistance
2507 (Super Duplex): extremely high resistance to chloride corrosion and pitting

Why These Grades Are Common for Round Bar

Wide availability from global mills
Balanced mechanical properties for machining and structure
Different corrosion resistance levels for different environments
Suitable for cutting, turning, and CNC machining

Typical Applications

Mechanical shafts and rotating parts
Fasteners and bolts
Automotive components
Marine equipment
Chemical and industrial machinery

Available Processing Services

Stainless Steel Round Bar can be supplied with cutting, polishing, machining, heat treatment, and customized size production according to project requirements.

FAQ

1. What are the most common stainless steel round bar grades?

304, 316, 303, 321, 410, 420, and 2205 are the most commonly used grades.

2. Which grade is best for machining?

303 stainless steel is widely used for machining due to its free-cutting properties.

3. Which grade has the best corrosion resistance?

316L and duplex grades such as 2205 offer excellent corrosion resistance.

4. Can stainless steel round bars be heat treated?

Yes, especially martensitic grades like 410 and 420.

5. Which grade is most widely used overall?

304 stainless steel is the most widely used general-purpose grade.

17 Years Of Export Experience Supplier
Sufficient Inventory | Processing Factory

Our Company Establishment: Export started in 2006, with 18 years of export experience; Exported to over 100 countries, with over 800 cumulative clients.Warehouse Inventory: Up to 20,000 tons