DIN 1.4550 (AISI 347) Supplier in India – Dipti Metal Industries

Company Overview

Dipti Metal Industries, headquartered in Mumbai, India, is a leading DIN 1.4550 (AISI 347) Supplier, Manufacturer, Stockist, Dealer, and Exporter. Since 2009, under the leadership of Mr. Kumpsingh Rajput, we have exported stainless steel products to more than 56+ countries worldwide under the trusted “DIPTI” brand.

We manufacture and supply DIN 1.4550 Pipes, DIN 1.4550 Pipe Fittings, DIN 1.4550 Flanges, DIN 1.4550 Fasteners, DIN 1.4550 Valves, and DIN 1.4550 Gaskets, certified and globally compliant.

📧 Contact: info@diptimetal.in

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🔹 Material Description – DIN 1.4550 (AISI 347)

• EN Symbol (Short): X6CrNiNb18-10

• AISI Equivalent: AISI 347

• UNS Equivalent: S34700

• Grade: TP347

• Density: 7.9 g/cm³

• Hardness: ≤ 215 HB (Rockwell B90 max)

• Structure: Austenitic stainless steel

Key Features:

• Niobium-stabilized stainless steel

• Excellent resistance to intergranular corrosion

• High creep strength at elevated temperatures

• Good weldability without post-weld heat treatment

• Chemically resistant and non-magnetic in the annealed condition

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🔹 International Equivalents

• DIN / EN: 1.4550 – X6CrNiNb18-10

• AISI / ASTM: AISI 347 – Grade TP347

• UNS (USA): S34700

• JIS (Japan): SUS 347

• BS (UK): 347S17

• AFNOR (France): X6CrNiNb18-10

• GOST (Russia): 08Ch18N12B / 0Cr18Ni11Nb

• ISO / Chinese: X04Cr18Ni10Nb

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🔹 Chemical Composition

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🔹 Mechanical Properties

At 20 °C (Solution Annealed):

• Yield Strength (0.2% Rp): ~205 MPa

• Tensile Strength (Rm): 500–700 MPa

• Elongation: ≥ 35%

• Hardness: ≤ 215 HB

• Impact Strength (ISO-V): ≥ 100 J (longitudinal), 60 J (transverse)

At Elevated Temperatures:

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🔹 Physical Properties

• Density: 7.9 g/cm³

• Elastic Modulus: ~200 GPa

• Thermal Conductivity: ~15 W/m·K

• Specific Heat: ~500 J/kg·K

• Operating Temperature Range: –454 °F (cryogenic) to 1652 °F (continuous)

• Solution Heat Treatment: 1010–1100 °C (air or water cooling)

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🔹 Standards & Specifications

• ASTM A182: Forged flanges, fittings, valves for high-temp service

• ASTM A213: Seamless boiler, superheater & exchanger tubes

• ASTM A249: Welded austenitic boiler, superheater & condenser tubes

• ASTM A276: Stainless rods & cross-sections

• ASTM A312: Seamless & welded austenitic pipes

• ASTM A403: Wrought austenitic pipe fittings

• DIN EN 10028-1 / 7: Pressure vessel steels – stainless

• DIN EN 10088-2: Stainless steel sheets & ribbons

• DIN EN 10216-5: Seamless stainless tubes under pressure

• DIN EN 10217-7: Welded stainless tubes under pressure

• DIN EN 10296-2 / 10297-2: Stainless pipes for machinery

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🔹 Welding & Processing

• Classification: CEN ISO/TR 15608 (Group 8.1)

• Weldability: Excellent (TIG, MAG, manual arc)

• Recommended Filler Materials: 1.4551, 1.4316

• Post-Weld Heat Treatment: Not required

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🔹 Applications

• Boilers, superheaters, and heat exchangers

• Petrochemical and chemical plants

• Pulp & paper industry

• Food & dairy processing equipment

• Nitric and acetic acid processing units

• Oil refineries and power plants

• Pressure vessels and welded structures

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🔹 Product Supply Range – DIN 1.4550

• Plates & Sheets: Plates, sheet cuts, custom profiles

• Pipes & Tubes: Seamless, welded, exchanger tubes

• Pipe Fittings: Elbows, reducers, tees, caps, stub ends

• Flanges: Weld Neck, Slip-On, Blind, Socket Weld, Threaded

• Fasteners: Bolts, Nuts, Studs, Washers, Screws

• Bars: Round and flat bars

• Valves & Gaskets: Full industrial range

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🌍 Global Export Reach

We export DIN 1.4550 (AISI 347) products worldwide:

• Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait

• Europe: Germany, UK, France, Italy, Spain, Poland

• North America: USA, Canada, Mexico

• South America: Brazil, Argentina, Chile

• Asia-Pacific: Japan, Singapore, South Korea, China, Australia

• Africa: South Africa, Egypt, Nigeria, Kenya

Exports are shipped via Nhava Sheva, Mundra, Kandla, Chennai, Cochin, Hazira, Vizag, and Kolkata.

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🔹 Certifications & Quality

• ISO 9001:2015 Certified

• EN 10204 3.1 / 3.2 MTCs provided

• PED & NACE MR0175 Compliance

• Third-Party Inspection: TÜV, SGS, BV, DNV

• 100% traceability with heat numbers

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❓ Frequently Asked Questions (FAQ)

Q1: What is DIN 1.4550 also known as?
A: DIN 1.4550 is also known as AISI 347, UNS S34700, SUS 347, or X6CrNiNb18-10.

Q2: Why is niobium added to AISI 347?
A: To stabilize the steel against carbide precipitation, improving weldability and corrosion resistance.

Q3: What are its mechanical strengths?
A: Yield ~205 MPa, tensile 500–700 MPa, elongation ≥ 35%, hardness ≤ 215 HB.

Q4: What is the service temperature?
A: From cryogenic (–454 °F) up to 870 °C continuous and 925 °C intermittent.

Q5: What industries use DIN 1.4550?
A: Oil & gas, chemical, petrochemical, power generation, pulp & paper, food processing.

Q6: Is DIN 1.4550 weldable?
A: Yes, using TIG, MAG, or manual arc welding, with no post-weld heat treatment needed.

Q7: Which standards cover 1.4550?
A: ASTM A182, A213, A249, A276, A312, A403, and DIN/EN equivalents.

Q8: What is its density?
A: Approximately 7.9 g/cm³.

Q9: Does Dipti Metal provide certifications?
A: Yes, ISO, EN 10204, PED, NACE, and third-party inspection certifications.

Q10: Why choose Dipti Metal Industries?
A: Trusted global exporter, 15+ years’ experience, certified quality, competitive pricing, and strong global logistics.