• Stainless Steel Round Bars
Stainless Steel Round Bars

Stainless Steel Round Bars

Machined Components, Pump Shafts, Valves, Fasteners, Machine Tools, Dairy Equipments, Surgical & Medical Parts, Threaded Bars, Studs, Bolts, Pins, Hinges and Handles.
Grade: 201a, 201b, 201c, 202, 204Cu, 303, 303Cu, 303F, 304, 304Cu, 304L, 310, 316, 316L, 32, 410, 420, 416, 430, 431, 430F & others
Condition: Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Diameter: (Size) 2 mm to 12mm (1/8" to 1/2") 6mm to 40mm (1/4" to 1 1/2")
Diameter Tolerance: h9 (Din 671),h11 ASTM A 484 H7, h8, h9 (Din 671)
Length: As per requirement.


Changyi stainless offers a complete range of stainless round bar. From the common grades such as 303 Rounds, 316 Rounds, 304 Rounds, and 416 Rounds, Changyi Stainless also supplies 416 HT Rounds, 17-4 (630) Rounds and 17-4 (H1150) Rounds. Changyi stainless stocks only the highest quality round bars in a wide variety of grades and sizes, with ASTM standard dimensional tolerances and mechanical properties. These round bars are used for a number of applications including Pump Shafts, Hot and Cold Forging, Fastener and Scaffolding applications.

303 Rounds (or other 303 Stainless bar), 316 Rounds, and 304 Rounds etc are austenitic stainless steel bars which can be used in immensely corrosive conditions. These grades are characterized by exceptional resistance to stress corrosion cracking in chloride bearing surroundings, superb resistance to crevice and pitting corrosion, immense resistance to general corrosion, and certain physical properties that render good mechanical strength. 

The stock of 316 Rounds, 303 Rounds, 304 Rounds, 303 Stainless Bar and 416 Rounds at Changyi Stainless is of the highest quality. We offer round bars in a variety of grades and sizes to meet the needs of all our customers.

The stocking grades and size range for round bar are listed below:

AISI 303.0937" to 14.00"
AISI 304/304L.0937" to 18.00"
AISI 316/316L.1250" to 24.00"
AISI 416.1250" to 14.00"
AISI 416 HT (26-32 HRC).250" to 3.000"
AISI 17-4 (630).1875" to 16.00"
AISI 17-4 (H1150)1.000" to 14.00"

ASTM GradeCMnSiSPCrNiMoOther
 304 0.08 max 2.00 max 0.75  max 0.030  max 0.045  max 18.0-20.0 8.0 11.0 - -
 316 0.08 max 2.00 max 0.75  max 0.030  max 0.045  max 16.0-18.0 10.0 14.0 2.0 3.0 -
 317L 0.035  max 2.00 max 0.75  max 0.030  max 0.045  max 18.0-20.0 11.0 14.0 3.0 4.0 -
 310 S 0.08 max 2.00 max 1.5 max 0.030  max 0.045  max 24.0-26.0 19.0 22.0 3.0 4.0 -
 347 H 0.04 0.10 2.00 max 0.75  max 0.030  max 0.045  max 17.0- 19.0 9.0 13.0 - 10C(Cb+Ta)<1.10%
 321 0.08 2.00 max 0.75  max 0.030  max 0.045  max 17.0-20.0 9.0 12.0 - 5C 0.70%

 Grade 303 (AISI 303)

Grade 303 or the UNS S30300 stainless steel bar, is free machining steel. Its impressive corrosion resistance and great machinability makes it one of the most used free machining stainless steels obtainable. UNS S30300 or Grade 303 is extensively used in different products starting from general machining like screw etc. Grade 303 is not responsive to hear treatment, but its impressive toughness is admirable just as with all the other austenitic grades.

Grade 303 is used in following Industries:

All-purpose machining, Screw machining.


 Grade 304/304L (AISI 304/304L)

Grade 304/304L or UNS S30403 as it’s called technically, in general is preferred due to the fact that it is the low carbon content variant of Type 304 and because it is “free machining” variant. The Grade 304/304L comes with immense blend of corrosion resistance, strength and fabricibility, which makes it suitable for almost in all types of industries. The Grade 304/304L also is unresponsive to heat treatments, but the strength and hardness could be increased using cold working.

Grade 304/304L is used in almost every industry.

 Grade 316/316L (AISI 316/316L)

The Grade 316/316L also called as Grade 316 and UNS S31600 is an austenitic stainless steel which has chromium, molybdenum and nickel as its major alloying elements. Molybdenum (is not present in stainless steel Grade 304) addition is helpful for Grade 316/316L’s increased resistance in chloride environments and salt water. Grade 316/316L gives quite good creep resistance in high temperatures and it has better strength in comparison to stainless steel 304.

Grade 316/316L is non-magnetic in annealed state, but it can become a little magnetic while under extensively cold temperatures, and requires further annealing to correct. Grade 316/316L isn’t responsive to thermal treatment but it’s strength and hardness can be increased by cold working.

Grade 316/316L stainless steel technically referred as UNS S31600/S31603 UNS S31600/S31603 and generally called as stainless steel 316/316L. Dual Certified is stainless steel 316’s low carbon content modification. Grade 316/316L stainless steel primarily is used for manufacturing heavy-gage welded products. Grade 316/316L is anti carbide precipitation and it can be used in the 797° F to 1580° F temperature range, which is more apt with application connecting corrosion resistance.

Industries that uses Grade 316/316L:

Chemical, Architectural (in corrosive environments), Mining, Marine, Pharmaceutical, Petroleum, Textile, Pulp and Paper, Water filtration, Transportation.

 Grade 416 (AISI 416)

Grade 416, also called UNS S41600 is a Martensitic grade of stainless steel. The Martensitic stainless steels have been manufactured as an alloy, which could be toughened using heat treatment and it also will be corrosion resistant, though it is not as resistive to corrosion as the ferritic or austenitic stainless steels. Stainless Steel 416 has respectable wear resistant, and is magnetic; it also is highly machinable. Its other qualities include: non-galling and non-seizing properties, sensible strength in hardened and tempered state and resistance to gently corrosive surroundings. Generally it’s ordered in T (tempered), H (hardened) and A (annealed) conditions.

Stainless Steel 416 doesn’t come with the approval to be used in high sulfur surroundings (MR-01-03, NACE MR-01-75). Stainless Steel 416 is in general considered as the first “free machining” stainless steel and has the capability to be easily tapped, turned, reamed, broached, threaded milled and drilled according to manufacturer's approval for different suitable tool feeds, types and speeds.

Industries using Grade 416 include:

Electrical motor, Nut and Bolt, Gear, Pump, Valve



Contact: Ms. Cathy xie

Phone: +86 13327907677

E-mail: [email protected]

Add: Building A, East Workshop, No. 59, Tiandingshan Road, Economic Development Zone, Wenzhou, Zhejiang, China