HRS Ferritic · 347/347H Stainless Steel Plate Supplier, Stockist & Importer

Stainless Steel 347/347H Plates
AISI 347/347H Plates

Niobium-Stabilized Austenitic Grade · Exceptional Resistance to Intergranular Corrosion · Superior High-Temperature Service · Global Industrial Supply

ASTM A240 / AISI 347/347H UNS S34700 / S34709 EN 1.4550 / 1.4961 JIS SUS 347/347H
📋 Table of Contents
1What is 347/347H Plate?
2Grade Overview
3Metallurgical Characteristics
4Specifications
5Available Stock
6Types of 347/347H Plates
7Chemical Properties
8Mechanical Properties
9Pricing Information
10Equivalent Grades
11FAQs
HRS Ferritic · Globally Recognized Supplier

What is 347/347H Stainless Steel Plate?

347 and 347H stainless steel plates are niobium-stabilized austenitic stainless steels designed for high-temperature service and resistance to intergranular corrosion. The addition of niobium (columbium) helps stabilize the material, preventing carbide precipitation during welding and heating processes. 347H is a high-carbon version of 347 stainless steel, offering improved creep resistance and higher strength at elevated temperatures.

  • Excellent resistance to intergranular corrosion
  • Suitable for high-temperature applications
  • Superior weldability without post-weld heat treatment
  • High creep strength in the 347H grade
  • Long service life in harsh environments
  • Resistant to oxidation and scaling
  • Ideal for thermal cycling conditions
347/347H Stainless Steel Plate Stockist India
NiobiumStabilized
Grade Overview

347/347H Stainless Steel Plate

HRS Ferritic is a trusted and leading 347/347h stainless steel Plate Supplier, Stockist, and Importer, delivering high-quality plates sourced from certified global mills for reliable performance in critical applications.

Niobium
Stabilization Type
Austenitic
Crystal Structure
≥ 515
Tensile Strength MPa
0.5–100
Thickness Range mm
Composition Analysis

Metallurgical Characteristics of 347/347H Stainless Steel Plate

The mechanism of 347/347H plates is based on niobium stabilization, which prevents chromium depletion at grain boundaries to retain corrosion resistance at high temperatures.

Cr
Chromium
Provides corrosion resistance through oxide layer formation on the surface.
Ni
Nickel
Enhances ductility, toughness, and strength of the austenitic material.
Nb
Niobium
Stabilizes the alloy and prevents carbide formation during welding and heating.
C
Carbon
Improves strength, particularly in the high-carbon 347H grade for creep resistance.
Mn
Manganese
Improves toughness and workability during industrial processing.
Si
Silicon
Enhances oxidation resistance at elevated service temperatures.
P&S
Trace Elements
Phosphorus and Sulfur are present in controlled amounts affecting machinability.
Fe
Iron
The base balance element providing structural integrity to the alloy.
Technical Data

Specifications for 347/347H Stainless Steel Plate

ASTM A240 · ASME SA240 · UNS S34700/S34709 · EN 1.4550/1.4961

Specification Details
ASTM / ASME ASTM A240 / ASME SA240 (Plate, Sheet, and Strip)
UNS UNS S34700 / UNS S34709
EN / DIN 1.4550 (X6CrNiNb18-10) / 1.4961 (X6CrNiNb18-11)
ISO ISO X6CrNiNb18-10 / ISO X6CrNiNb18-11
JIS SUS 347 / SUS 347H
Product Form Sheets / Plates
Thickness Range 0.5 mm to 100 mm
Standard Widths 1000, 1219, 1250, 1500, 1800, 2000, 2500, 3000, 3500 mm
Standard Lengths 2000, 2440, 2500, 3000, 5800, 6000 mm
Processing Custom Width and Length Cut Available
Surface Finish Hot Rolled (HR), Cold Rolled (CR), Annealed & Pickled (AP)
Supply Condition Solution Annealed
Packaging Bundled, Wooden Plates, Bubble wraps, Customized
Inventory

Available Stock & Product Forms

📄

Flat Products

Precision sheets, heavy plates, and high-temperature shim sheets available.

🌀

Coils & Strips

Slitting coils, perforated coils, and thin foils from 0.05 mm thickness.

✂️

Speciality Forms

Circles, rings, custom-cut blanks, and chequered (tread) plates in stock.

📐

Edge Conditions

Mill edge, slit edge, round edge, and square edge available as per order.

🧪

Chromium (Cr)

17.0–19.0% — Core element for oxide layer formation.

✨

Niobium (Nb)

≥ 10 × C — Stabilizes alloy and prevents carbide precipitation.

⚫

Carbon (C)

0.04–0.10% (347H) — Higher content for improved high-heat strength.

🔗

Nickel (Ni)

9.0–13.0% — Enhances ductility and toughness in austenitic structure.

💪

Tensile Strength

≥ 515 MPa — High ultimate strength for critical service.

🎯

Yield Strength

≥ 205 MPa — Reliable structural stability at 0.2% offset.

📏

Elongation

≥ 40% — Exceptional ductility in 50 mm gauge length.

🔬

Hardness

≤ 201 HB — Controlled hardness for high-temp pressure service.

Product Range

Types of 347/347H Stainless Steel Plate

We supply diverse variations of 347/347H plates processed for specific industrial surface and heat requirements.

Hot Rolled SS 347/347H Plate
Cold Rolled SS 347/347H Plate
Polished SS 347/347H Plate
Pickled & Passivated SS 347/347H Plate
Annealed SS 347/347H Plate
Slitted SS 347/347H Plate
Application Sectors

Industries We Serve

Sugar
Sugar Industry
Global cane and beet processing requiring thermal endurance.
Power
Power Industry
Electricity generation and distribution systems.
Ship Building
Ship Building
Marine propulsion and exhaust components.
Mechanical
Mechanical & Plant Engineering
Industrial machinery design solutions.
Food
Food, Beverage & Dairy
Processed food manufacturing environments.
Oil Gas
Oil & Gas Plant
Refinery furnace units and burner assemblies.
Chemical Composition

Chemical Properties of 347/347H Stainless Steel Plate

Niobium stabilization prevents intergranular corrosion by ensuring chromium remains available for the protective oxide layer.

Element 347 (% max/min) 347H (% max/min)
Carbon (C) ≤ 0.08 0.04 – 0.10
Chromium (Cr) 17.0 – 19.0 17.0 – 19.0
Nickel (Ni) 9.0 – 13.0 9.0 – 13.0
Niobium (Nb) + Ta ≥ 10 × C (min), ≤ 1.0 Same as 347
Manganese (Mn) ≤ 2.0 ≤ 2.0
Silicon (Si) ≤ 1.0 ≤ 1.0
Phosphorus (P) ≤ 0.045 ≤ 0.045
Sulfur (S) ≤ 0.030 ≤ 0.030
Iron (Fe) Balance Balance
Performance Data

Mechanical Properties of 347/347H Plates

515
Tensile Strength
MPa (min) — Superior performance in extreme thermal zones
205
Yield Strength
MPa (min) — Reliable structural offset at 0.2%
40%
Elongation
In 50mm — Exceptional ductility for industrial forming
201 HB
Hardness (Max)
Brinell — Controlled durability for service longevity
High
Creep Strength
347H provides superior strength at elevated heat
Cost Information

Price List for 347/347H Stainless Steel Plate

Price Factors

Factors affecting the Price

  • Nickel and Chromium raw material fluctuations
  • Thickness and overall size of the plate
  • Surface finish and processing requirements
  • Quantity and bulk order discounts
  • Import duties and global logistics costs
  • Strong supply chain & certified mill sourcing
Get Pricing Today
GET A FREE QUOTE!
Custom pricing · Bulk discounts · Export-ready delivery
📧 info@hrsferritic.com
International Standards

Equivalent Grades for 347/347H Stainless Steel Plate

Grade 347/347H is internationally recognized for its niobium-stabilized high-heat performance.

Standard / Organization 347 Grade 347H Grade
ASTM / ASME 347 (UNS S34700) 347H (UNS S34709)
AISI / UNS AISI 347 / S34700 AISI 347H / S34709
EN (Europe) 1.4550 (X6CrNiNb18-10) 1.4961 (X6CrNiNb18-11)
DIN (Germany) 1.4550 1.4961
ISO X6CrNiNb18-10 X6CrNiNb18-11
JIS (Japan) SUS 347 SUS 347H
BS (UK) 347S31 347S51
AFNOR (France) Z6CNNb18-10 Z10CNNb18-10
GOST (Russia) 08Kh18N12B 08Kh18N12B (High C)
UNI (Italy) X6CrNiNb18-10 X8CrNiNb16-13
SS (Sweden) 2338 2368
KS (Korea) STS 347 STS 347H
IS (India) 04Cr18Ni10Nb 06Cr18Ni11Nb
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Ready Stock & Product Forms
  • Flat Products: Precision sheets, heavy plates, shim sheets
  • Coils & Strips: Slitting coils, perforated coils, thin foils from 0.05 mm
  • Speciality Forms: Circles, rings, custom-cut blanks, chequered (tread) plates
  • Edge Conditions: Mill edge, slit edge, round edge, square edge
🏭
Quality Assurance & Logistics
  • Testing: PMI, Ultrasonic Testing (UT), Radiography (RT), corrosion testing
  • Certification: EN 10204 3.1 / 3.2, NACE compliance (on request)
  • Global Supply: USA, UAE, Saudi Arabia, Singapore, Indonesia, Europe
  • Export Packaging: ISPM-15 fumigated wooden crates, shrink-wrapped & moisture-protected
Use Cases

Applications of 347/347H Plates

✈️ Aerospace
Used in aircraft exhaust systems and high-temperature components due to heat resistance.
⛽ Oil & Gas
Ideal for pipelines, pressure vessels, and heat exchangers in corrosive high-heat environments.
🌾 Fertilizer Industry
Used in chemical handling equipment requiring stabilized intergranular corrosion resistance.
⚡ EV & Electrical
Provides thermal stability and durability in advanced battery and electrical components.
🧪 Chemical Processing
Suitable for reactors, tanks, and piping systems handling aggressive high-temp chemicals.
🏗️ Infrastructure
Used in structural applications requiring high strength and extreme corrosion resistance.
🚗 Automotive
Used in exhaust systems and engine components exposed to high heat and cycling.
💊 Pharmaceutical
Ensures hygiene and corrosion resistance in specialized high-temp processing equipment.
Why HRS Ferritic

Why Choose HRS Ferritic for 347/347H Plate?

HRS Ferritic is dedicated to delivering high-performance stainless steel products with a focus on quality, reliability, and customer satisfaction. We are recognized as a premier Supplier, Stockist, and Importer, ensuring every plate is sourced from valuable certified mills and conforms to the highest engineering standards.

Leading 347/347H Plate Supplier & Stockist
High-quality materials from certified global mills
Competitive pricing with large bulk availability
Fast delivery and robust logistics network
Customized solutions for industrial needs
Full EN 10204 3.1 / 3.2 documentation
Export-grade packaging for international supply
Proven expertise in stabilized stainless grades
🇮🇳

Cities We Supply In India

New Delhi · Ahmedabad · Jaipur · Surat · Salem · Gandhinagar · Varanasi · Haldia · Bhiwandi · Tiruppur · Jamnagar · Thiruvananthapuram · Rajahmundry · Visakhapatnam · Bhubaneswar · Vijaywada · Rajkot · Bharuch · Coimbatore · Nagpur · Raipur · Cochin · Ludhiana · Panipat · Durgapur · Agra · Indore · Kuala Lumpur · Al Jubail · Pimpri-Chinchwad · Sharjah · Karachi · Chandigarh · Bogota · Muscat · Madrid · Tehran · Granada · Jakarta · Los Angeles · Rio de Janeiro · Melbourne · Cairo · New York · Busan · Milan · Montreal · Singapore · Sydney · Dubai · Lagos · Gurgaon · Port-of-Spain · Hong Kong · Navi Mumbai · Secunderabad · Bangkok · Aberdeen · Bhopal · Atyrau · Caracas · Jamshedpur · Thane · Faridabad · Ahvaz · Ahmedabad · Hanoi · Bengaluru · Dallas · Moscow · Surat · Riyadh · Rajkot · Al Khobar · Hyderabad · Haryana · Ernakulam · Gimhae-si · Algiers · Thiruvananthapuram · Brisbane · Calgary · Mumbai · Chennai · Courbevoie · Toronto · Vung Tau · Ankara · Doha · Nagpur · Howrah · Ranchi · Perth · Noida · Houston · Kolkata · Chiyoda · Mexico City · Edmonton. Geoje-si · Abu Dhabi · Santiago · New Delhi · Colombo · Ludhiana · Lahore · Coimbatore · Ho Chi Minh City · Manama · Ulsan · London · Visakhapatnam · Jaipur · Kuwait City · Seoul · Istanbul · Pune · Baroda · Kanpur · La Victoria · Jeddah · Dammam · Petaling Jaya · Nashik · Vadodara ·jamnagar ·hazira · jubail industrial city · Ajman · Capetown · San Francisco · sao paulo · Barcelona · Ahmedi · Muscat · Madrid · Birmingham · Johannesburg.
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Countries We Export To

Saudi Arabia · Qatar · Canada · Sri Lanka · Iran · Nigeria · Bangladesh · Oman · UAE · Turkey · Kuwait · Venezuela · Africa · Singapore · Netherlands · United Kingdom · Mexico · Malaysia · United States · Australia · Japan Saudi Arabia · Iran · Iraq · UAE · Qatar · Bahrain · Oman · Kuwait · Turkey · Yemen · Syria · Jordan · Cyprus · Nigeria · Algeria · Angola · South Africa · Libya · Egypt · Sudan · Equatorial Guinea · The Republic Of Congo · Gabon · USA · Canada · Mexico · Panama · Costa Rica · Puerto Rica · Trinidad And Tobago · Jamaica · Bahamas · Denmark · Russia · Norway · Germany · France · Italy · Uk · Spain · Ukraine · Netherland · Belgium · Greece · Czech Republic · Portugal · Hungary · Albania · Austria · Switzerland · Slovakia · Finland · Ireland · Croatia · Slovenia · Malta · India · Singapore · Malaysia · Indonesia · Thailand · Vietnam · South Korea · Japan · Sri Lanka · Maldives · Bangladesh · Myanmar · Taiwan · Cambodia · Argentina · Bolivia · Brazil · Chile · Venezuela · Colombia · Ecuador · Guyana · Paraguay · Uruguay · New Zealand · Romania · Puerto Rico · Nepal · Kenya · Afghanistan · Lithuania · Belarus · Zimbabwe · Israel · Azerbaijan · Poland · Australia · Morocco · Philippines.
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Frequently Asked Questions

Quick answers to common queries about 347/347H Stainless Steel Plate.

Larger sizes increase overall cost due to higher material usage from a 347/347h stainless steel Plate Supplier.
Yes, thicker plates cost more as they require more raw material from a 347/347h stainless steel Plate Stockist.
Premium finishes increase cost due to additional processing by a 347/347h stainless steel Plate Importer.
Fluctuations in nickel and chromium prices directly impact pricing from a 347/347h stainless steel Plate Stockist.
It is widely used in high-temperature pressure vessels and heat exchangers due to its niobium stabilization which prevents intergranular corrosion.
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