Stainless Steel 309 Pipes

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Stainless Steel 309 Pipes Specification

Application
Petrochemical, Chemical, Oil & Gas, Construction, Heat Exchanger, Furnace, Power Plants

Other Material
Can be offered in SS 304, 316 as well

Product Type
Pipe / Tube

Surface Finish
Polished, Annealed, Pickled

End Protector
Plastic Caps or Bevel Ends

Alloy
Yes, Alloy Steels with chromium-nickel

Connection
Plain, Beveled, Threaded

Material
Stainless Steel

Steel Grade
309

Type
Seamless, Welded, ERW

Shape
Round, Square, Rectangular

Standard
ASTM A312, A213, A269, A249, DIN, EN

Grade
SS 309

Surface Treatment
Bright Annealed, Hot Rolled, Cold Drawn

Technique
Cold Drawn, Hot Rolled

Thickness
1 mm to 50 mm

Outer Diameter
6 mm to 630 mm

Length
Standard & Custom, up to 6 meters or custom cut

Tolerance
0.5 mm

Color
Silver / Metallic

About Stainless Steel 309 Pipes

What Are Specification Stainless Steel 309 Pipes?

ASTM / ASME Name	ASTM A 312 ASME SA 312 / ASTM A 358 ASME SA 358
Dimensions Standard	ASTM, ASME and API
Stainless Steel 309 Seamless Pipes Size Range	0.5 NB 16 NB
ERW 304 Pipes	1/2 NB 24 NB
EFW 304 Pipes	6 NB 100 NB
OD Sizes	0.5NB TO 30NB IN
Specialized in	Large Diameter Size
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Frequently Used Type	Seamless / ERW / Welded / Fabricated / LSAW Pipes
Available Pipes Form	Round
Stainless Steel 309 Seamless Pipes Stock Length	Single Random, Double Random & Cut Length.
Stainless Steel 309 Seamless Pipes End Finishing	Plain End, Beveled End, Treaded End

Equivalent material Of Stainless Steel 309 Pipes?

STANDARD	WERKSTOFF NR.	UNS
SS 309	1.4828	S30900

Chemical Composition Of Stainless Steel 309 Pipes?

Grade	C	Ni	Si	S	Mn	P	Cr	Mo
SS 309	0.20 max	12.0 15.0	0.75 max	0.03 max	2.00 max	0.045 max	22.0 24.0

Mechanical Properties Of Stainless Steel 309 Pipes?

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
SS 309	8.0 g/cm3	1455C (2650F)	Psi 89900 , MPa 620	Psi 45000 , MPa 310	45 %

Exceptional Strength and Durability

SS 309 pipes deliver reliable mechanical performance even under extreme thermal and mechanical stress. Their minimum tensile strength of 550 MPa and yield strength of 205 MPa ensure they withstand high-pressure processes, while maximum elongation of 40% provides superior flexibility and formability for various industrial needs.

Outstanding Heat and Corrosion Resistance

Thanks to high chromium and nickel content, these pipes excel in resisting oxidation, sulfur, and carburizing environments. They maintain structural integrity at elevated temperaturesup to 1150C in oxidizing and 1035C in reducing conditionsmaking them highly suitable for furnaces, power plants, and refineries.

Flexible Sizing and Customization

Available in a wide range of diameters (6 mm to 630 mm), thicknesses (1 mm to 50 mm), and lengths (standard or custom up to 6 meters), SS 309 pipes can be tailored to specific project requirements. Options for plain, beveled, or threaded ends, and various finishes ensure compatibility with diverse applications.

Assured Quality and Inspection

Every SS 309 pipe undergoes rigorous quality checks, including 100% radiography, hydrostatic and eddy current testing, and Positive Material Identification (PMI). This ensures impeccable integrity, compliance with international standards, and reliable performance in critical installations.

FAQs of Stainless Steel 309 Pipes:

Q: How are Stainless Steel 309 pipes typically used in industrial applications?

A: SS 309 pipes are widely utilized in petrochemical plants, refineries, heat exchangers, furnaces, and power stations due to their exceptional strength, high-temperature resistance, and excellent corrosion resistance in oxidizing and sulfurous environments.

Q: What benefits does the high chromium and nickel content offer in 309 pipes?

A: The elevated chromium (22-24%) and nickel (12-15%) levels provide superior resistance to oxidation, corrosion, and carburizing atmospheres, ensuring the pipes remain durable and maintain integrity in high-temperature operations.

Q: When should SS 309 pipes be selected instead of other stainless grades?

A: SS 309 pipes are chosen over other grades when applications demand higher resistance against oxidation and scaling at elevated temperatures, or when outstanding corrosion resistance in sulfur or carburizing environments is essential.

Q: What surface finishes are available for SS 309 pipes?

A: These pipes are available in a variety of finishes, including bright annealed, pickled, polished, hot rolled, and cold drawn, allowing for suitability across aesthetic and functional industrial requirements.

Q: How is the quality of Stainless Steel 309 pipes ensured?

A: Quality assurance involves several inspection processes such as 100% radiography, hydrostatic and eddy current testing, and PMI analysis, guaranteeing pipes meet strict ASTM, EN, and DIN standards.

Q: Where are SS 309 pipes manufactured and supplied from?

A: Stainless Steel 309 pipes are exported, manufactured, and supplied by leading producers and traders in India, catering to both domestic and international markets.

Q: What are the connection and end options for SS 309 pipes?

A: SS 309 pipes can be offered with plain ends, threaded ends, or beveled ends, and are equipped with end protectors such as plastic caps. This allows for easy and secure installation across different piping systems.

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