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Stainless Steel Round Bars

We primarily sell stainless steel materials procured from Aichi Steel Corporation.
Among these, our handling volume by weight of round bars / round steel is one of the top in the Kansai region.
"We want a material that is easy to process and does not rust"—
Stainless steel round bars continue to respond to this voice from the field.
Combining excellent corrosion resistance and stable machinability, they support a wide range of applications where sanitation and corrosion measures are required, such as food machinery, chemical equipment, and medical devices.

Types of Processing

There are various types of processing, ranging widely from machining to heat treatment.

Machining

Lathe Machining
(General-purpose lathes, NC lathes, etc.)
Drilling
(Machining Center processing, etc.)
Forging
(Free forging, roll forging, etc.)
Casting
(Sand casting, lost wax, etc.)

Heat Treatment

Quenching and Tempering
Typical heat treatments for “hardening.”
After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears.

Quenching: Around 800 – 900°C
Tempering: 150 – 650°C (Depending on application)
Annealing
A heat treatment for “softening.”
After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as “preparation” to condition the material.

Heating temperature: Around 750 – 900°C
Cooling method: Slow cooling inside a furnace
Normalizing
A heat treatment for “eliminating unevenness.”
After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials.

Heating temperature: Around 850 – 950°C
Cooling method: Natural cooling in the atmosphere
Solution Annealing (Solution Heat Treatment)
A heat treatment for “restoring rust resistance.”
By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields.

Heating temperature: Around 1,010 – 1,150°C
Cooling method: Rapid cooling by water or air

Stainless Steel Round Bar Inventory List

SUS304 Peeled Round Bar

Outer Diameter (mm)（10〜75）

Outer Diameter (mm)	10	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Stock Availability	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯
Length (mm)	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000

Outer Diameter (mm)（80〜）

Outer Diameter (mm)	80	85	90	95	100	105
Stock Availability	◯	◯	◯	◯	◯	◯
Length (mm)	4000	4000	4000	4000	4000	4000

SUS304 Cold Drawn Round Bar (Polished) h9

Outer Diameter (mm)（10〜75）

Outer Diameter (mm)	10	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Stock Availability	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯	◯
Length (mm)	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000	4000