ASTM A240 / ASME SA240 UNS S20400 Stainless Steel Plate

 

ASTM A240/ASME SA240 UNS S20400 Stainless Steel Plate supplier

 

For applications requiring cost-effective corrosion resistance, high strength, and excellent formability in mild environments, ASTM A240/ASME SA240 UNS S20400 Stainless Steel Plate is an excellent choice.

 

As a premier uns stainless supplier, Gangsteel specializes in providing top-quality sa 240/a 240 uns s20400 plates, sheets, coils, bars, and custom components, all compliant with sa 240/a 240 uns stainless grades standards, including ASTM A240 and ASME SA240. With an extensive inventory exceeding 600 tons and advanced manufacturing capabilities, Gangsteel ensures swift delivery and tailored solutions for clients worldwide.

Gangsteel explores the ASTM A240/ASME SA240 UNS S20400 chemical composition, mechanical properties, corrosion resistance, weldability, stainless steel surface finishes, equivalent materials, specifications, applications, and competitive ASTM A240/ASME SA240 UNS S20400 price per kg. Whether you're an engineer designing structural components or a procurement specialist sourcing for appliance manufacturing, this article will clarify why 204 stainless steel is a trusted option.

 

Explore our sa 240/a 240 uns stainless grades portfolio for related grades like sa 240/a 240 uns s20103, sa 240/a 240 uns s20153, sa 240/a 240 uns s20161, sa 240/a 240 uns s20200, and sa 240/a 240 uns s20910.

Why Choose ASTM A240/ASME SA240 UNS S20400 Stainless Steel Plate?

 

ASTM A240/ASME SA240 UNS S20400, commonly known as 204 stainless steel, is a low-carbon, nitrogen-enhanced austenitic stainless steel with 15.0-17.0% chromium, 1.5-3.0% nickel, 7.0-9.0% manganese, and 0.15-0.30% nitrogen. It is designed as a cost-effective alternative to higher-nickel grades like sa 240/a 240 uns s30400, offering good corrosion resistance in mild environments, excellent formability, and high strength due to nitrogen and manganese additions. The low carbon content (≤ 0.03%) enhances weldability, making it ideal for applications in appliance, automotive, and general-purpose industries.

The ASTM A240/ASME SA240 UNS S20400 stainless steel plate provides higher strength than sa 240/a 240 uns s20103 and sa 240/a 240 uns s20153 due to its elevated nitrogen and manganese content, though it has slightly lower corrosion resistance compared to sa 240/a 240 uns s20200. Its affordability and enhanced mechanical properties make it a preferred choice for structural and decorative applications.

Key benefits of ASTM A240/ASME SA240 UNS S20400 stainless steel plate include:

• Cost-Effective: Lower nickel content reduces costs compared to sa 240/a 240 uns s31600, making it economical for general-purpose applications.
• High Strength: Nitrogen (0.15-0.30%) and manganese (7.0-9.0%) enhance strength compared to sa 240/a 240 uns s20161.
• Excellent Formability: High manganese content ensures formability, ideal for deep drawing in appliance manufacturing.
• Good Weldability: Low carbon content minimizes intergranular corrosion, surpassing sa 240/a 240 uns s20200 in welded applications.

Case Study: An appliance manufacturer in India used sa 240/a 240 uns s20400 plates for washing machine drums, achieving a 25% cost reduction compared to sa 240/a 240 uns s30400 while maintaining strength and corrosion resistance in mild environments.

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ASTM A240/ASME SA240 UNS S20400 Corrosion Resistance

 

ASTM A240/ASME SA240 UNS S20400offers moderate corrosion resistance in mild environments, such as indoor settings or areas with low humidity and minimal exposure to corrosive agents. Its 15.0-17.0% chromium content provides a protective oxide layer, suitable for applications like appliance components and structural parts. The nitrogen content (0.15-0.30%) enhances pitting resistance slightly compared to sa 240/a 240 uns s20103, but it is less resistant to pitting and crevice corrosion than molybdenum-containing grades like sa 240/a 240 uns s20161 or sa 240/a 240 uns s31603. For chloride-rich or acidic environments, grades like sa 240/a 240 uns s32550 are recommended.

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ASTM A240/ASME SA240 UNS S20400 Weldability

 

The low carbon content (≤ 0.03%) of ASTM A240/ASME SA240 UNS S20400 enhances its weldability by reducing the risk of carbide precipitation and intergranular corrosion during welding. This makes it superior to sa 240/a 240 uns s20200 for welded structures, as the lower carbon content minimizes sensitization. It can be welded using common techniques such as TIG, MIG, and resistance welding, with appropriate filler materials to maintain corrosion resistance. Compared to sa 240/a 240 uns s20161, UNS S20400 offers better weldability due to its lower carbon content, making it ideal for applications like appliance manufacturing and structural components.

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ASTM A240/ASME SA240 UNS S20400 Stainless Steel Surface

 

The surface finish of ASTM A240/ASME SA240 UNS S20400 stainless steel plate significantly impacts its aesthetic appeal, functionality, and application suitability. Gangsteel offers a variety of surface finishes to meet diverse project requirements, as detailed below:

Surface Finish	Definition/Feature	Summary of Manufacturing Method	Application/Use
NO.1	Silver white, matte	Hot rolled to specified thickness, followed by heat treatment and pickling	Chemical tank, pipe, no need for surface gloss purposes
2B	Stronger gloss than NO.2D	Cold rolled, heat treated, pickled, and lightly cold rolled by polishing rollers	Medical equipment, food industry, construction material, kitchen utensils, general materials
NO.2D/2BB	Silver white	Heat treatment and pickling after cold rolling	General materials, deep drawing materials
NO.3	Rough grinding	Polished with No.100 to No.120 abrasives (JIS R6001) or 100~200# grinding belt	Kitchen utensils, building construction, building materials
NO.4 (4K)	Intermediate grinding	Polished with No.150 to No.180 abrasives (JIS R6001) or 150~180# stone abrasive belt	Kitchen utensils, building construction, medical equipment, building materials
NO.240	Fine grinding	Grinding with 240# stone abrasive belt	Kitchenware
NO.320	Very fine grinding	Grinding with 320# abrasive belt	Kitchenware
NO.400	Gloss close to BA	Grinding with 400# polishing wheel	General timber, construction timber, kitchen utensils
HL	Hairline grinding, continuous polishing streaks	Polished with suitable grain size abrasive (150~240#) for hairline grinding	Building construction, buildings, construction materials
BA (No.6/BA1/BA0)	Bright as a mirror	Bright heat treatment after cold rolling, high surface reflectivity	Kitchen utensils, electric equipment, building construction, building materials
NO.7	Close to mirror polishing	Grinding with 600# rotary polishing wheel	For art and decoration
NO.8 (Mirror/8K)	Shining like a mirror	Grinding mirrors with polishing wheels	Building construction, reflector, for decoration

These surface finishes allow sa 240/a 240 uns s20400 to be tailored for aesthetic or functional requirements, such as the mirror-like BA finish for decorative panels or the matte NO.1 finish for structural components.

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ASTM A240/ASME SA240 UNS S20400 Chemical Composition

 

The ASTM A240/ASME SA240 UNS S20400 chemical composition is optimized for high strength, formability, and cost-effectiveness, compliant with sa 240/a 240 uns stainless grades standards.

The high manganese (7.0-9.0%) and nitrogen (0.15-0.30%) content, combined with low nickel (1.5-3.0%), maintain the austenitic structure while reducing costs compared to sa 240/a 240 uns s30400. The chromium content (15.0-17.0%) provides moderate corrosion resistance, while the low carbon content (≤ 0.03%) enhances weldability compared to sa 240/a 240 uns s20200.

Element	Percentage (%)
Chromium (Cr)	15.0 – 17.0
Nickel (Ni)	1.5 – 3.0
Manganese (Mn)	7.0 – 9.0
Nitrogen (N)	0.15 – 0.30
Carbon (C)	≤ 0.03
Silicon (Si)	≤ 1.0
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.030
Iron (Fe)	Balance (~65%)

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ASTM A240/ASME SA240 UNS S20400 Mechanical Properties

 

The ASTM A240/ASME SA240 UNS S20400 mechanical properties offer a balance of high strength, excellent ductility, and formability, suitable for demanding structural and appliance applications.

These properties ensure that ASTM A240/ASME SA240 UNS S20400 stainless steel plate can withstand moderate mechanical stresses in mild environments. Annealing at 1010-1120°C (1850-2048°F) optimizes UNS S20400 mechanical properties for strength and formability.

Property	Value at 20°C
Tensile Strength (MPa)	≥ 690 (100 ksi)
Yield Strength (MPa)	≥ 310 (45 ksi)
Elongation (%)	≥ 40
Hardness (HBW)	≤ 241
Density	7.8 g/cm³ (0.282 lb/in³)

At Gangsteel, we’ve seen clients use sa 240/a 240 uns s20400 plates in structural components, where its high strength and formability provide advantages over sa 240/a 240 uns s20161.

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ASTM A240/ASME SA240 UNS S20400 Specifications and Forms

 

As a trusted uns stainless supplier, Gangsteel supplies sa 240/a 240 uns s20400 plates, sheets, coils, bars, and custom components, compliant with sa 240/a 240 uns stainless grades standards:

Our state-of-the-art processing facilities ensure precision and quality, meeting the diverse needs of global projects, from standard sizes to custom-cut components.

Plate and Sheet

• Thickness: 0.1 mm to 6 mm (sheet), 0.5 mm to 50 mm (plate)
• Width: Up to 2000 mm
• Length: 2000 mm to 12000 mm (or coiled for sheet)
• Surface Finish: Hot-rolled, cold-rolled, annealed, pickled, 2B, No.1, No.4, BA, or customized (see Stainless Steel Surface section)
• Standards: ASTM A240, ASME SA240
• Applications: sa 240/a 240 uns s20400 plates for structural components, UNS S20400 sheets for appliance manufacturing

Coil

• Thickness: 0.1 mm to 6 mm
• Width: Up to 2000 mm
• Standards: ASTM A240, ASME SA240
• Applications: Continuous production for welded pipes and tubes

Bar

• Diameter: 6 mm to 300 mm
• Length: Up to 12000 mm
• Finish: Hot-rolled, cold-drawn, centerless ground
• Standards: ASTM A479, ASME SA-479
• Applications: ASTM A240/ASME SA240 UNS S20400 bars for structural components

Custom Components

• Types: Flanges (ASME B16.5), fittings, CNC-machined parts, stainless cutting sheet part
• Tolerances: ±0.05 mm for precision components
• Applications: Tailored solutions for appliance and structural industries

Note: Need a specific size or finish? Gangsteel offers custom solutions, including precision cutting and heat treatments, to meet sa 240/a 240 uns stainless grades requirements. Contact us at admin@gangsteel.com for bespoke ASTM A240/ASME SA240 UNS S20400 material specifications.

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Applications of ASTM A240/ASME SA240 UNS S20400 Stainless Steel Plate

 

ASTM A240/ASME SA240 UNS S20400 stainless steel plateis tailored for industries requiring high strength, excellent formability, and cost-effective corrosion resistance in mild environments. Its nitrogen-enhanced austenitic structure ensures versatility in various applications.

Key ASTM A240/ASME SA240 UNS S20400 applications include:

• Appliances: sa 240/a 240 uns s20400 plates for washing machine drums and refrigerator panels.
• Structural Components: UNS S20400 sheets for frameworks and supports in mild environments.
• Automotive: ASTM A240/ASME SA240 UNS S20400 bars for structural and decorative components.
• Food Processing: Equipment for non-aggressive environments.
• General-Purpose: Utensils and components requiring high strength and moderate corrosion resistance.

Case Study: A structural engineering firm in India used sa 240/a 240 uns s20400 plates for building frameworks, achieving a 20% cost reduction compared to sa 240/a 240 uns s30400 while maintaining strength and corrosion resistance.

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ASTM A240/ASME SA240 UNS S20400 vs Related Grades

 

To aid in material selection, here’s a comparison of sa 240/a 240 uns s20400 with sa 240/a 240 uns s20103, sa 240/a 240 uns s20153, sa 240/a 240 uns s20161, sa 240/a 240 uns s20200, and sa 240/a 240 uns s20910:

This comparison highlights the unique advantages of each grade, helping you select the optimal material for your project requirements.

Property	ASTM A240/ASME SA240 UNS S20400	ASME SA240 UNS S20103	ASME SA240 UNS S20153	ASME SA240 UNS S20161	ASME SA240 UNS S20200	ASME SA240 UNS S20910
UNS Number	S20400	S20103	S20153	S20161	S20200	S20910
Type	Austenitic	Austenitic	Austenitic	Austenitic	Austenitic	Austenitic
Chromium Content	15.0-17.0%	16.0-18.0%	16.0-17.5%	15.0-18.0%	17.0-19.0%	20.5-23.5%
Nickel Content	1.5-3.0%	3.5-5.5%	4.0-5.0%	4.0-6.0%	4.0-6.0%	11.5-13.5%
Manganese Content	7.0-9.0%	5.5-7.5%	6.4-7.5%	4.0-6.0%	7.5-10.0%	4.0-6.0%
Molybdenum Content	-	-	-	0.5-2.0%	-	1.5-3.0%
Nitrogen Content	0.15-0.30%	≤ 0.25%	0.10-0.25%	0.08-0.20%	≤ 0.25%	0.20-0.40%
Carbon Content	≤ 0.03%	≤ 0.03%	≤ 0.03%	≤ 0.15%	≤ 0.15%	≤ 0.06%
Corrosion Resistance	Moderate in mild environments	Moderate in mild environments	Moderate in mild environments	Moderate in mild environments	Good in mild environments	Excellent in chlorides
Strength	Moderate	Moderate	Moderate	Moderate	Moderate	High
Temp Range	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)
Cost (USD/kg)	3-6	3-6	3-6	4-7	4-7	8-12
Applications	Appliances, structural	Architectural, appliances	Architectural, transportation	Appliances, automotive trim	Architectural, appliances	Chemical, marine

• ASTM A240/ASME SA240 UNS S20400 vs ASME SA240 UNS S20103: S20400 offers higher strength due to elevated manganese and nitrogen, while sa 240/a 240 uns s20103 provides slightly better corrosion resistance due to higher chromium.
• ASTM A240/ASME SA240 UNS S20400 vs ASME SA240 UNS S20153: S20400 has higher strength due to increased manganese and nitrogen, while sa 240/a 240 uns s20153 offers slightly better corrosion resistance.
• ASTM A240/ASME SA240 UNS S20400 vs ASME SA240 UNS S20161: S20400 provides better weldability due to lower carbon content, while sa 240/a 240 uns s20161 offers improved pitting resistance due to molybdenum.
• ASTM A240/ASME SA240 UNS S20400 vs ASME SA240 UNS S20200: S20400 offers higher strength, while sa 240/a 240 uns s20200 provides better corrosion resistance due to higher chromium and nickel.
• ASTM A240/ASME SA240 UNS S20400 vs ASME SA240 UNS S20910: S20400 is more cost-effective for mild environments, while sa 240/a 240 uns s20910 provides superior strength and corrosion resistance for aggressive environments.

Conclusion: Choose sa 240/a 240 uns s20400 for high-strength, cost-effective applications in mild environments, sa 240/a 240 uns s20103 or sa 240/a 240 uns s20153 for better corrosion resistance, sa 240/a 240 uns s20161 for improved pitting resistance, sa 240/a 240 uns s20200 for better corrosion resistance, or sa 240/a 240 uns s20910 for high-strength, corrosion-resistant applications.

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ASTM A240/ASME SA240 UNS S20400 Equivalent Materials

 

ASTM A240/ASME SA240 UNS S20400aligns with international standards for global compatibility, ensuring seamless integration into projects worldwide.

The equivalent grades allow for flexibility in sourcing materials across different regions, making ASTM A240/ASME SA240 UNS S20400 a versatile choice for cost-effective applications.

Standard	Grade
UNS	S20400
W.Nr.	1.4597
EN	X8CrMnCuNB17-8-3
ASTM	A240
ASME	SA240

Note: ASTM A240/ASME SA240 UNS S20400 equivalent grades comply with sa 240/a 240 uns stainless grades standards, offering interchangeability with sa 240/a 240 uns s20103 for similar applications.

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ASTM A240/ASME SA240 UNS S20400 Allowable Stress

 

The allowable stress values for ASTM A240/ASME SA240 UNS S20400, per ASME BPVC Section II, Part D, ensure reliable performance in mild environments.

These values reflect the material’s ability to withstand moderate mechanical stresses while maintaining corrosion resistance in non-aggressive conditions.

Temperature (°C)	Allowable Stress (MPa)
100	140
200	130
300	120
400	110
500	100

Note: These values ensure sa 240/a 240 uns s20400 performs reliably in appliance and structural applications.

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ASTM A240/ASME SA240 UNS S20400 Price

 

The ASTM A240/ASME SA240 UNS S20400 price per kg ranges from USD 3-6 per kg (FOB), influenced by several factors:

The high strength and cost-effectiveness of ASTM A240/ASME SA240 UNS S20400 make it a preferred choice for appliance and structural applications.

• Alloy Content: Lower nickel content reduces costs compared to sa 240/a 240 uns s30400.
• Market Demand: High demand in appliance and structural industries drives UNS S20400 price.
• Product Form: ASTM A240/ASME SA240 UNS S20400 plates may cost more than sheets due to processing complexity.
• Global Supply Chain: Freight and raw material availability impact ASTM A240/ASME SA240 UNS S20400 cost.

For a precise ASTM A240/ASME SA240 UNS S20400 price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.

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Related Stainless Steel Grades

 

As a leading uns stainless supplier, Gangsteel offers a wide range of sa 240/a 240 uns stainless grades to complement sa 240/a 240 uns s20400 for various applications:

This diverse portfolio ensures clients can find the ideal material for their specific project needs, from corrosion resistance to high-temperature performance.

• sa 240/a 240 uns s20103: Cost-effective austenitic stainless steel for general-purpose applications.
• sa 240/a 240 uns s20153: Austenitic stainless steel with higher manganese for enhanced strength.
• sa 240/a 240 uns s20161: Austenitic stainless steel with molybdenum for improved corrosion resistance.
• sa 240/a 240 uns s20200: Austenitic stainless steel with enhanced corrosion resistance for mild environments.
• sa 240/a 240 uns s20910: Austenitic stainless steel for high-strength, corrosion-resistant applications.
• sa 240/a 240 uns s30400: General-purpose austenitic stainless steel.
• sa 240/a 240 uns s30403: Low-carbon for enhanced weldability.
• sa 240/a 240 uns s30409: High-carbon for high-temperature strength.
• sa 240/a 240 uns s30908: Low-carbon for moderate high-temperature applications.
• sa 240/a 240 uns s31000: High-carbon for extreme high-temperature strength.
• sa 240/a 240 uns s31008: Low-carbon for enhanced weldability in high-temperature applications.
• sa 240/a 240 uns s31009: High-carbon for enhanced creep resistance.
• sa 240/a 240 uns s31600: Molybdenum-alloyed for chloride resistance.
• sa 240/a 240 uns s31603: Low-carbon for enhanced weldability in chloride environments.
• sa 240/a 240 uns s31700: High corrosion resistance for chemical processing.
• sa 240/a 240 uns s31703: Low-carbon for acidic environments.
• sa 240/a 240 uns s32100: Titanium-stabilized for high-temperature applications.
• sa 240/a 240 uns s32109: High-carbon for enhanced creep resistance.
• sa 240/a 240 uns s34700: Stabilized for high-temperature corrosion resistance.
• sa 240/a 240 uns s34709: Enhanced creep resistance for high-temperature applications.
• sa 240/a 240 uns s30815: High-temperature corrosion resistance.
• sa 240/a 240 uns n08904: Superior sulfuric acid resistance for chemical applications.
• sa 240/a 240 uns s31254: High corrosion resistance for aggressive environments.
• sa 240/a 240 uns s43932: Ferritic for automotive exhaust systems.
• sa 240/a 240 uns s44400: Ferritic with high corrosion resistance for water tanks.
• sa 240/a 240 uns s32304: Lean duplex for structural applications.
• sa 240/a 240 uns s31803: Duplex for marine and chemical applications.
• sa 240/a 240 uns s32205: Duplex for enhanced corrosion resistance.
• sa 240/a 240 uns s32750: Super-duplex for aggressive environments.
• sa 240/a 240 uns s32760: Super-duplex for extreme corrosion resistance.
• sa 240/a 240 uns s32520: Super-duplex for high-strength applications.
• sa 240/a 240 uns s32550: Super-duplex for enhanced sulfuric acid resistance.
• sa 240/a 240 uns s41000: Martensitic for high-strength, wear-resistant applications.
• sa 240/a 240 uns s43000: Ferritic for automotive and appliance applications.

Note: These grades complement sa 240/a 240 uns s20400 in appliance, structural, and general-purpose applications. Contact Gangsteel for a full catalog to find the perfect material for your project.

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FAQ

 

Q: What is the main difference between ASTM A240/ASME SA240 UNS S20400 and ASME SA240 UNS S20200?

A: ASTM A240/ASME SA240 UNS S20400 offers higher strength due to elevated manganese and nitrogen content, while sa 240/a 240 uns s20200 provides better corrosion resistance due to higher chromium and nickel content.

Q: Is ASTM A240/ASME SA240 UNS S20400 suitable for structural applications?

A: Yes, its high strength and excellent formability make it ideal for structural components in mild environments compared to sa 240/a 240 uns s20161.

Q: How does the price of ASTM A240/ASME SA240 UNS S20400 compare to ASME SA240 UNS S20910?

A: ASTM A240/ASME SA240 UNS S20400 is typically 50-60% less expensive than sa 240/a 240 uns s20910 due to its lower alloy content, offering cost-effective performance for mild environments.

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Contact Us

 

For sa 240/a 240 uns s20400 quotes, technical data sheets, or custom solutions, contact Gangsteel at admin@gangsteel.com. Explore our sa 240/a 240 uns stainless grades portfolio for more options.

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