UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars

UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars

Name: UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars
Brand: JAYANT IMPEX
Price: 950.0 INR
Availability: InStock

950.0 INR/Kilograms

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Product Details:

Material UNS S31254 / SMO 254
Tolerance h9, h11, h13, or as required
Length 100 mm to 6000 mm
Type Round Bar, Forged Flat Bar
Standard ASTM A182 / ASME SA182
Diameter 6 mm to 350 mm
Application Chemical processing, marine engineering, pollution control, oil & gas industry, pulp & paper industry
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UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars Price And Quantity

Minimum Order Quantity 1 Kilograms
Price 950.0 INR/Kilograms

UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars Product Specifications

Length 100 mm to 6000 mm
Type Round Bar, Forged Flat Bar
Tolerance h9, h11, h13, or as required
Material UNS S31254 / SMO 254
Finish Bright, Black, Polished, Pickled
Technique Forged / Hot Rolled / Cold Drawn
Processing Forged, Peeled, Centreless Ground
Specific Use High chloride environments, seawater handling, desalination plants
Application Chemical processing, marine engineering, pollution control, oil & gas industry, pulp & paper industry
Grade DIN 1.4547
Diameter 6 mm to 350 mm
Standard ASTM A182 / ASME SA182

Melting Point 1320 - 1390 C
Density 8.0 g/cm3
Export Packing Standard export seaworthy packing (plastic/wooden cases)
Corrosion Resistance Excellent resistance to pitting, crevice, and stress corrosion cracking
Heat Treatment Solution Annealed
Hardness 95 HRB
Yield Strength 310 MPa
Microstructure Austenitic
Elongation 35%
Ultimate Tensile Strength 650 MPa

Product Description

UNS S31254 (also known by its brand name SMO 254 or European standard designation DIN 1.4547) is a premium, 6% Molybdenum (6-Moly) super austenitic stainless steel.

It is specifically engineered to survive severe, high-chloride environments where standard stainless steels (like 316L) rapidly fail from pitting or stress-corrosion cracking. The terms you provided refer to the exact same metallurgy across different standardizing bodies, tailored into specific manufacturing geometry and finishes.

Core Engineering Specifications

The material's chemical layout yields a Pitting Resistance Equivalent Number (PREN) between 42 and 44, making it ideal for marine engineering, desalination plants, and chemical processing.

Tensile Strength: Minimum 650 MPa (roughly double the strength of 300-series stainless steels).
Yield Strength: Minimum 300 MPa (0.2% Proof stress).
Chemical Profile: 19.520.5% Chromium, 17.518.5% Nickel, 6.06.5% Molybdenum, enhanced with 0.180.22% Nitrogen for added structural matrix strength.

Breakdown of Formats & Available Stock

Depending on your blueprint requirements, these bars are processed into specific structural profiles:

1. Round Bars (Precision CNC Turning & Components)

Round profiles serve as the foundation stock for machining high-vibration pump shafts, valve stems, fasteners, and offshore downhole tools.

The 254 SMO Round Bars - ASTM A276, A279, A479 is a highly versatile option covering a broad size spectrum from 4 mm to 350 mm in diameter. It is certified under international standards for sour-gas and corrosive marine infrastructures.

2. Forged Flat Bars (High-Pressure Infrastructure)

When the term Forged is paired with Flat Bars, it indicates the metal underwent intense mechanical hammering and grain refinement at high temperatures (typically between 1040C and 1150C), followed by a rapid water quench. This process eliminates micro-porosity and maximizes structural integrity.

Application: Ideal for critical pressure-vessel internal supports, flange hubs, chemical scrubbing blades, and structural framing.
Dimensions: Typically stocked in thicknesses from 2 mm up to 150 mm and widths climbing up to 500 mm.

Sourcing Comparison Matrix

To match your specific machining or fabrication step, consider the typical supply formats:

Metric Profile	Available Conditions	Primary Benefit
Round Bar (4mm to 350mm)	Cold-Drawn, Centerless Ground, Bright Finish	Excellent dimensional accuracy for immediate automated CNC lathe turning.
Forged Flat Bar (Up to 150mm Thick)	Solution Annealed, Hot Forged, Black or Pickled	Maximum structural density; highly uniform grain flow for high-pressure parts.

Superior Corrosion Resistance for Demanding Environments

SMO 254 bars are specifically designed for outstanding resistance against pitting, crevice, and stress corrosion cracking, making them ideal for both marine and high-chloride industrial applications. Their austenitic microstructure ensures minimum corrosion even under harsh conditions, thus enhancing longevity and reliability in desalination plants, chemical processing units, and seawater handling systems.

Versatile Applications Across Various Industries

These UNS S31254 DIN 1.4547 bars are extensively used in chemical processing, marine engineering, oil & gas extraction, pollution control, and the pulp & paper industry. Their robust properties and superior finish options allow for seamless integration into critical infrastructure where high strength, durability, and corrosion resistance are paramount.

Precision Manufacturing and Global Export Standards

Bars are manufactured via advanced forging, hot rolling, and cold drawing processes, ensuring precise tolerances (h9, h11, h13, or as per requirements) and consistent quality. Standard export seaworthy packaging guarantees safe international transportation, serving customers worldwide with reliable, certified products that meet ASTM and ASME specifications.

FAQ's of UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars:

Q: How are UNS S31254 Round DIN 1.4547 Forged Flat SMO254 Bars manufactured?

A: These bars are produced using forging, hot rolling, or cold drawing techniques, followed by solution annealing. This ensures high strength, excellent surface finishes, and precise dimensional tolerances as per customer requirements.

Q: What are the primary benefits of using SMO254 bars in industrial applications?

A: SMO254 bars provide exceptional resistance to pitting, crevice, and stress corrosion cracking, especially in high-chloride environments. Their high mechanical strength and durability make them ideal for challenging applications such as seawater handling and desalination.

Q: When is it recommended to use these bars over standard stainless steel options?

A: These bars are preferred when superior corrosion resistance and higher mechanical properties are needed, particularly in aggressive conditions found in marine, chemical, and oil & gas sectors where standard stainless steels may fail.

Q: Where can UNS S31254 DIN 1.4547 bars be sourced or purchased in India?

A: They can be obtained from a wide range of manufacturers, suppliers, traders, exporters, and fabricators throughout India, many of whom also provide global shipping with export-standard packing.

Q: What is involved in the export packing process for these forged flat bars?

A: Bars are packed in standard export seaworthy packaging, using plastic and/or wooden cases to prevent damage during transportation and ensure they arrive safely at international destinations.

Q: How are these bars finished and processed before delivery?

A: Finishes include bright, black, polished, or pickled, and processing methods such as forging, peeling, and centreless grinding are applied to meet specific application or aesthetic requirements.

Q: What specific industries benefit most from the use of SMO254 forged flat bars?

A: Industries like chemical processing, marine engineering, oil & gas, pollution control, and pulp & paper benefit significantly due to the bars' excellent mechanical performance and high corrosion resistance, particularly against chlorides and seawater.

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