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Stainless Steel 321H Round Bars

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Stainless Steel 321H Round Bars Specification

Product Form
Solid Bar

Hardness
217 HB

Coating Type
Uncoated / as per customer requirement

Recyclable
Yes

Tensile Strength
515 MPa min

Corrosion Resistant
Excellent resistance to intergranular corrosion

Diameter
10 mm 300 mm

Material Composition %
Cr 17-19%, Ni 9-12%, C 0.04-0.10%, Ti 5xC% min., Mn 2%, Si 1%, P 0.045%, S 0.030%, Fe balance

Heat Resistance
Up to 900C (1652F)

Size
Customized sizes as per order

Product Name
Stainless Steel 321H Round Bars

Steel Type
Austenitic Stainless Steel

Steel Product Type
Round Bar

Grade
321H

Thickness
10 mm to 300 mm

Shape
Round

Steel Standard
ASTM A276 / ASTM A479 / ASME SA276 / SA479

Surface
Bright, Polished, Black, Peeled

Composition
Chromium-Nickel with Titanium addition

Application
Construction, Oil & Gas Industry, Petrochemical, Power Plants, Heat Exchangers, Chemical Plants, Aerospace, Pharmaceutical Equipment

Dimension (L*W*H)
Customizable as per requirement

Weight
Dependent on size and length

Color
Silver Gray

Material Grade
321H

Finish Type
Polished / Annealed

Usage
For fabrication in high temperature environments

About Stainless Steel 321H Round Bars

What Are Specification Stainless Steel 321H Round Bars?

Standard	ASTM A276 / A479, ASME SA276 / A479
Round Bar Size	3mm~ 800mm
Square Bar Size	4mm* 4mm ~100mm* 100mm
Flat Bar Size	2mm ~ 100mm
Hex Bar Size	2mm ~ 100mm
Angle Size	3mm* 20mm* 20mm~ 12mm* 100mm* 100mm
Thickness	50 mm to 6000 mm Long
Length	1 To 6 Meters, Custom Cut Length
Form	Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc

Equivalent material Of Stainless Steel 321H Round Bars?

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
SS 321H	1.4878	S32109	SUS 321H	X12CrNiTi18-9

Chemical Composition Of Stainless Steel 321H Round Bars?

Grade	C	Mn	Si	P	S	Cr	N	Ni	Ti
SS 321H	0.04 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 19.00	0.10 max	9.00 12.00	4(C+N) 0.70 max

Mechanical Properties Of Stainless Steel 321H Round Bars?

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1454 C (2650 F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %

Enhanced High-Temperature Performance

Stainless Steel 321H Round Bars are engineered for use in situations where exceptional heat resistance and strength are required. Their ability to withstand temperatures up to 900C without loss of mechanical integrity makes them a top choice for fabrication in power plants, chemical facilities, and heat exchangers. The titanium stabilization prevents carbide precipitation, extending their service life even under continuous thermal cycling.

Precision Manufacturing and Customization

Manufactured in accordance with ASTM and ASME standards, these round bars are available in diameters ranging from 10 mm to 300 mm and are supplied in lengths from 2 to 6 meters or as per customer specifications. This flexibility ensures compatibility with a variety of industrial requirements. Surfaces can be tailoredbright, polished, or peeledensuring seamless integration into both functional systems and visible structures.

Guaranteed Quality and Reliable Delivery

Each Stainless Steel 321H Round Bar undergoes stringent quality checks, from compositional analysis to dimensional verification, ensuring compliance with global export standards. Products are securely packaged in wooden crates, protecting them during shipment. With ready stock or a 2-4 week lead time, reliable delivery is assured for both urgent and planned projects anywhere in India or globally.

FAQs of Stainless Steel 321H Round Bars:

Q: How are Stainless Steel 321H Round Bars typically used in industry?

A: These round bars are widely utilized in industries that demand high strength and corrosion resistance at elevated temperatures, such as construction, oil & gas sectors, power plants, heat exchangers, chemical facilities, aerospace, and pharmaceutical equipment manufacturing.

Q: What are the key benefits of choosing 321H grade stainless steel round bars?

A: 321H round bars offer excellent intergranular corrosion resistance, superior heat resistance (up to 900C), and stability due to titanium addition, making them ideal for high-temperature fabrication and environments susceptible to thermal cycling.

Q: When should I select 321H over other stainless steel grades like 304?

A: 321H is preferred when fabrication and service involve prolonged exposure to high temperatures (above 500C), as it resists carbide precipitation and retains its mechanical properties better than 304, especially in welded structures.

Q: Where can I source customized dimensions for 321H round bars?

A: Manufacturers and suppliers in India provide customization services for length, diameter, and surface finish according to client requirements. Dimensions can range from 10 mm to 300 mm diameter and 2 to 6 meters in length or as specified.

Q: What is the packaging process for Stainless Steel 321H Round Bars during export?

A: Round bars are packed in export-worthy packaging such as wooden boxes or crates. This packaging ensures the bars are protected from corrosion, mechanical damage, and environmental impact during long-distance transportation.

Q: How does the machinability and weldability of 321H compare to other stainless steels?

A: 321H exhibits good machinability, similar to grade 304 stainless steel, and provides excellent weldability, making it easy to fabricate and implement in various industrial projects without special techniques.

Q: What makes 321H suitable for high-temperature applications?

A: 321Hs high chromium and nickel content, further enhanced by titanium addition, provides structural stability and prevents sensitization, allowing these bars to maintain mechanical strength in continuous service up to 900C.

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