405 Stainless Steel Plate
405 stainless steel is a ferritic stainless steel improved in machinability by adding aluminum. Its key feature is that it is not prone to hardening after welding and is easy to machine.
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Product Introduction

405 Stainless Steel Plate is a cost-effective aluminum-containing ferritic stainless steel and a specialized, non-hardenable modification of the 12% chromium family.

Its primary advantage lies in its exceptional weldability. The addition of aluminum (Al) prevents the formation of significant amounts of austenite at high temperatures, ensuring it does not harden upon quenching. This characteristic results in ductile, crack-resistant welds, making 405 the preferred choice for applications involving extensive welding or where post-weld heat treatment is not feasible.

As a ferritic grade, it is magnetic, offers good thermal conductivity and low thermal expansion, and provides moderate corrosion and oxidation resistance at a cost significantly lower than common austenitic grades like 304.

Product parameters


Item / ParameterSpecification for 405 (UNS S40500 / AISI 405)Notes / Significance
Key FeatureNon-Hardenable, Weldable Ferritic Grade. Superior weldability without post-weld annealing, offering cost-effective moderate corrosion resistance.Primary reason to choose 405 for complex welded fabrications where annealing is impractical.
Common DesignationsUNS S40500, AISI 405, EN 1.4002, JIS SUS405, GB 06Cr13Al405 is a widely standardized, global material grade.
Chemical Composition (Typical wt.%)C: ≤ 0.08
Cr: 11.5 - 13.5Si: ≤ 1.00
Mn: ≤ 1.00
Al: 0.10 - 0.30
Low carbon & specific Al content are key to its non-hardenable, weldable nature.
Mechanical Properties (Annealed Plate)Tensile Strength (Rm): ≥ 410 - 490 MPa
Yield Strength (Rp0.2): ≥ 177 - 345 MPa
Elongation (A): ≥ 20 - 24%
Hardness (HB): ≤ 183
Good strength and sufficient ductility for forming. Quenched & tempered versions offer higher strength.
Physical PropertiesDensity: ~7.75 - 7.80 g/cm³
Thermal Conductivity: ~26.0 W/(m·K) (at 100°C)Maximum Service Temp (Air): Up to ~650 - 700°C (1200°F)
Higher thermal conductivity and lower expansion than austenitic grades like 304. Good oxidation resistance at elevated temperatures.
Key Standards (Plate)ASTM A240/A240M, JIS G 4303, GB/T 3280, GB/T 4237ASTM A240 is the principal international procurement standard for pressure vessel and general application plate.

Surface selection

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Packaging and transportation

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FACTORY SHOW

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FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

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