Products Description
SS 321/321H round bars/rods are indeed classified as austenitic stainless steel bars. These bars are available in various sizes, shapes, and grades to suit different applications.
The distinguishing characteristic of SS 321/321H is its low carbon content, which makes it an ideal raw material for certain applications. The low carbon content helps to prevent the formation of chromium carbide precipitation at the grain boundaries, thereby minimizing the risk of sensitization and intergranular corrosion. This property is particularly important in high-temperature environments.
The composition of SS 321/321H round bars/rods typically includes a significant amount of nickel and chromium. Nickel enhances the corrosion resistance of the steel, while chromium provides excellent oxidation resistance. The combination of nickel and chromium contributes to the overall corrosion resistance of the material, making it suitable for use in various corrosive environments.
Moreover, the presence of nickel and chromium makes SS 321/321H susceptible to heat treatment. Heat treatment processes, such as annealing or solution treatment, can be applied to these bars/rods to modify their mechanical properties and improve their performance in specific applications.
In summary, SS 321/321H round bars/rods are classified as austenitic stainless steel bars that offer low carbon content, high corrosion resistance, and susceptibility to heat treatment. The presence of nickel and chromium enhances their resistance to corrosion and oxidation. These bars/rods are available in different sizes, shapes, and grades to cater to various industrial requirements.
Stainless Steel 321 Round Bar Range
|
ASTM A276 321 Round Bar Specification |
ASTM A276 / ASTM A479 /ASTM A182 / ASME SA276 / ASME SA479 / ASME SA182 |
|
ASTM A276 321 Round Bar Manufacturing Process |
Hot Rolled / Cold Rolled / Hot Forging / Rolling / Machining |
|
ASTM A276 321 Round Bar Other Grades |
202 / 304 / 304L / 304H / 309S / 310S / 321 / 321L / 321Ti / 317L / 321 / 321H / 347 / 347H / 904L etc. |
|
ASTM A276 321 Round Bar Dimension |
Round Bars : Outside Diameter in the range of 4mm to 500mm |
|
ASTM A276 321 Round Bar Length |
2 meters to 7.5 meters ( 8 feet to 24 feet), or Custom Length as per Requirement |
|
ASTM A276 321 Round Bar Forms and Shape |
Round, Square, Hex (A/F), Rectangle, Billet, Ingot, HRAP, Bright, Shaft, Forging Etc. |
|
ASTM A276 321 Round Bar Finish |
Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
|
ASTM A276 321 Round Bar Dimension Standard |
ASTM A 484 / ISO h11 / ISO K12 Tolerances F8 / h8, h9, h10, h11, h12, k12, k13, A-484, EN-10060, DIN-1013 etc. |
|
ASTM A276 321 Round Bar Heat Treatment |
Condition A in which the bars are Annealed |
|
ASTM A276 321 Round Bar Surface Finish |
Centreless Ground & Belt Polished, up to Ra value = 0.2 um (12 RMS), and Grit Polished of up to 180 to 600 |
|
ASTM A276 321 Round Bar Chamfering |
Available in 30°, 45° & 60° through fully automatic, both-end chamfering machine |
|
ASTM A276 321 Round Bar Other Testing |
NACE MR0175, IGC TEST, Intergranular Corrrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, Magnetic Particle Inspection (MPI), 100% tested thru Digital Ultrasonic Flaw Detector, as per ASTM A-388, EN 10308 (class 1to4),API 6A/ISO 10423:2003-PSL3,SEP 1920:1984 ( class A,B,C), MIL STD 2154 etc. |
|
ASTM A276 321 Round Bar Value Added Services |
Rolling, Drill, Punch, CNC Machining, Sand Blasting, Shot Blasting, Heat Treatment, Anti-rust Paint, Polishing |
|
ASTM A276 321 Round Bar Packaging |
Loose / Carrate / Wooden Pallet / Wooden Box / Plastic Cloth Wraps |
|
ASTM A276 321 Round Bar Shipment & Transportation |
By Road - Truck / Train Partial Load, Full Load, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
|
ASTM A276 321 Round Bar Material Test Certificate |
Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC |
|
ASTM A276 321 Round Bar Documentation |
Commercial Invoice which includes HS Code / Packing List including net weight and gross weight, number of boxes, Marks and Numbers / Certificate of Origin legalized/attested by Chamber of Commerce or Embassy / Fumigation Certificates / Raw Material Test Reports / Material Traceability Records / Quality Assurance Plan (QAP) / Heat Treatment Charts / Test Certificates certifying NACE MR0103, NACE MR0175 / Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2 / Guarantee Letter / NABL approved Laboratory Test Reports / Welding Procedure Specification/Procedure Qualification Record, WPS/PQR / Form A for the purposes of the Generalized System of Preferences (GSP) |
321/321H STAINLESS STEEL ROUND BAR EQUIVALENT GRADES
|
STANDARD |
UNS |
WNR. |
JIS |
EN |
|
SS 321 |
S32100 |
1.4541 |
SUS 321 |
X6CrNiTi18-10 |
|
SS 321H |
S32109 |
1.4878 |
SUS 321H |
X12CrNiTi18-9 |
CHEMICAL COMPOSITION OF STAINLESS STEEL 321/321H ROUND BAR
|
% |
Cr |
Ni |
C |
Si |
Mn |
P |
S |
N |
Ti |
Fe |
|
321 |
min:17.0 |
min: 9.0 |
max:0.08 |
max:0.75 |
max:2.0 |
max:0.045 |
max:0.03 |
max:0.10 |
min:5*(C+N) |
Balance |
|
321H |
min:17.0 |
min: 9.0 |
min:0.04 |
min:18.0 |
max:2.0 |
max:0.045 |
max:0.03 |
max:0.10 |
min:5*(C+N) |
Balance |
MECHANICAL PROPERTIES OF STAINLESS STEEL 321/321H ROUND BAR
|
Grade |
Tensile Strength |
Yield Strength 0.2% |
Elongation - |
Hardness |
|
321/321H |
75 |
30 |
40 |
217 |
PHYSICAL PROPERTIES OF 321/321H STAINLESS STEEL ROUND BAR
|
Denstiy |
Coefficient of |
Thermal Conductivity BTU/hr-ft-°F |
Specific Heat BTU/lbm -°F |
Modules of Elasticity (annealed)2-psi |
|
|
at 68 °F |
at 68 – 212°F |
at 68 – 1832°F |
at 200°F |
at 32 – 212°F |
in tension (E) |
|
0.286 |
9.2 |
20.5 |
9.3 |
0.12 |
28 x 106 |
SS 321/321H Round Bar Application Industries Our Stainless Steel 321/321H Round Bar are used in a wide range of applications and various industries. Below are a few of them:
Petrochemical Industry
Oil and Gas Industry
Chemical Industry
Power Plant Industry
Energy Industry
Pharmaceuticals Industry
Pulp & Paper Indusry
Food Processing Industry
Aerospace Industry
Refining Industry
|
ASTM A276 321 Round Bar Specification |
ASTM A276 / ASTM A479 /ASTM A182 / ASME SA276 / ASME SA479 / ASME SA182 |
|
ASTM A276 321 Round Bar Manufacturing Process |
Hot Rolled / Cold Rolled / Hot Forging / Rolling / Machining |
|
ASTM A276 321 Round Bar Other Grades |
202 / 304 / 304L / 304H / 309S / 310S / 321 / 321L / 321Ti / 317L / 321 / 321H / 347 / 347H / 904L etc. |
|
ASTM A276 321 Round Bar Dimension |
Round Bars : Outside Diameter in the range of 4mm to 500mm |
|
ASTM A276 321 Round Bar Length |
2 meters to 7.5 meters ( 8 feet to 24 feet), or Custom Length as per Requirement |
|
ASTM A276 321 Round Bar Forms and Shape |
Round, Square, Hex (A/F), Rectangle, Billet, Ingot, HRAP, Bright, Shaft, Forging Etc. |
|
ASTM A276 321 Round Bar Finish |
Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
|
ASTM A276 321 Round Bar Dimension Standard |
ASTM A 484 / ISO h11 / ISO K12 Tolerances F8 / h8, h9, h10, h11, h12, k12, k13, A-484, EN-10060, DIN-1013 etc. |
|
ASTM A276 321 Round Bar Heat Treatment |
Condition A in which the bars are Annealed |
|
ASTM A276 321 Round Bar Surface Finish |
Centreless Ground & Belt Polished, up to Ra value = 0.2 um (12 RMS), and Grit Polished of up to 180 to 600 |
|
ASTM A276 321 Round Bar Chamfering |
Available in 30°, 45° & 60° through fully automatic, both-end chamfering machine |
|
ASTM A276 321 Round Bar Other Testing |
NACE MR0175, IGC TEST, Intergranular Corrrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, Magnetic Particle Inspection (MPI), 100% tested thru Digital Ultrasonic Flaw Detector, as per ASTM A-388, EN 10308 (class 1to4),API 6A/ISO 10423:2003-PSL3,SEP 1920:1984 ( class A,B,C), MIL STD 2154 etc. |
|
ASTM A276 321 Round Bar Value Added Services |
Rolling, Drill, Punch, CNC Machining, Sand Blasting, Shot Blasting, Heat Treatment, Anti-rust Paint, Polishing |
|
ASTM A276 321 Round Bar Packaging |
Loose / Carrate / Wooden Pallet / Wooden Box / Plastic Cloth Wraps |
|
ASTM A276 321 Round Bar Shipment & Transportation |
By Road - Truck / Train Partial Load, Full Load, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
|
ASTM A276 321 Round Bar Material Test Certificate |
Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC |
|
ASTM A276 321 Round Bar Documentation |
Commercial Invoice which includes HS Code / Packing List including net weight and gross weight, number of boxes, Marks and Numbers / Certificate of Origin legalized/attested by Chamber of Commerce or Embassy / Fumigation Certificates / Raw Material Test Reports / Material Traceability Records / Quality Assurance Plan (QAP) / Heat Treatment Charts / Test Certificates certifying NACE MR0103, NACE MR0175 / Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2 / Guarantee Letter / NABL approved Laboratory Test Reports / Welding Procedure Specification/Procedure Qualification Record, WPS/PQR / Form A for the purposes of the Generalized System of Preferences (GSP) |
|
STANDARD |
UNS |
WNR. |
JIS |
EN |
|
SS 321 |
S32100 |
1.4541 |
SUS 321 |
X6CrNiTi18-10 |
|
SS 321H |
S32109 |
1.4878 |
SUS 321H |
X12CrNiTi18-9 |
|
% |
Cr |
Ni |
C |
Si |
Mn |
P |
S |
N |
Ti |
Fe |
|
321 |
min:17.0 |
min: 9.0 |
max:0.08 |
max:0.75 |
max:2.0 |
max:0.045 |
max:0.03 |
max:0.10 |
min:5*(C+N) |
Balance |
|
321H |
min:17.0 |
min: 9.0 |
min:0.04 |
min:18.0 |
max:2.0 |
max:0.045 |
max:0.03 |
max:0.10 |
min:5*(C+N) |
Balance |
|
Grade |
Tensile Strength |
Yield Strength 0.2% |
Elongation - |
Hardness |
|
321/321H |
75 |
30 |
40 |
217 |
|
Denstiy |
Coefficient of |
Thermal Conductivity BTU/hr-ft-°F |
Specific Heat BTU/lbm -°F |
Modules of Elasticity (annealed)2-psi |
|
|
at 68 °F |
at 68 – 212°F |
at 68 – 1832°F |
at 200°F |
at 32 – 212°F |
in tension (E) |
|
0.286 |
9.2 |
20.5 |
9.3 |
0.12 |
28 x 106 |
