ASME SA240 / ASTM A240 UNS S43400 Stainless Steel Sheet (Type 434) supplier

 

Explore the versatility of sa240/a240 uns s43400, a high-quality ferritic stainless steel sheet offered by Gangsteel, a leading uns stainless supplier.

Compliant with sa240/a240 uns stainless gradesstandards, including ASTM A240 and ASME SA240, UNS S43400 delivers enhanced corrosion resistance, moderate strength, and aesthetic appeal for applications like automotive trim and industrial components. With an inventory exceeding 600 tons and advanced manufacturing capabilities, Gangsteel ensures precision and rapid delivery for global clients.

Gangsteel provides a detailed overview of ASME SA240/ASTM A240 UNS S43400, covering its chemical composition, density, mechanical properties, corrosion resistance, weldability, surface finishes, equivalent materials, specifications, applications, and competitive pricing per kg. Ideal for engineers and procurement specialists, UNS S43400 is a cost-effective solution for demanding environments. Discover related grades like sa240/a240 uns s41003to meet diverse project needs.

Why Choose ASME SA240/ASTM A240 UNS S43400 Stainless Steel Sheet?

 

ASME SA240/ASTM A240 UNS S43400 (Type 434), a ferritic stainless steel, features 16.0-18.0% chromium and 0.75-1.25% molybdenum, offering enhanced corrosion resistance, moderate strength, and excellent aesthetic appeal. It is designed for applications requiring durability in moderately corrosive environments, such as automotive trim, architectural components, and industrial equipment. The addition of molybdenum improves pitting and crevice corrosion resistance compared to non-molybdenum grades like sa240/a240 uns s43000, while its ferritic structure provides excellent scaling resistance up to 815°C (1500°F).

UNS S43400 offers superior corrosion resistance compared to sa240/a240 uns s41003due to higher chromium and molybdenum content, and it is more cost-effective than high-alloy grades like sa240/a240 uns s44400. While less resistant to severe chloride environments, its combination of corrosion resistance, aesthetic appeal, and affordability makes it a preferred choice for automotive and decorative applications.

Key benefits include:

• Enhanced Corrosion Resistance: Chromium (16.0-18.0%) and molybdenum (0.75-1.25%) provide superior resistance to moderately corrosive environments compared to sa240/a240 uns s42900.
• Good Weldability: Low carbon content (≤ 0.12%) ensures good weldability compared to martensitic grades like sa240/a240 uns s41000.
• High Heat Resistance: Suitable for temperatures up to 815°C (1500°F), comparable to sa240/a240 uns s43035.
• Aesthetic Appeal: Ideal for decorative applications like automotive trim due to its polishable surface.

Case Study: An automotive manufacturer in India used UNS S43400 sheets for exterior trim components, achieving a 20% cost reduction compared to sa240/a240 uns s44400while improving corrosion resistance and aesthetic quality.

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ASME SA240/ASTM A240 UNS S43400 Density

 

The density of ASME SA240/ASTM A240 UNS S43400 is approximately 7.70 g/cm³ (0.278 lb/in³), typical for ferritic stainless steels with low nickel and added molybdenum. This density supports precise weight calculations for applications like automotive trim, aligning with sa240/a240 uns s41008(7.70 g/cm³) and slightly less than sa240/a240 uns s42035(7.75 g/cm³).

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Corrosion Resistance of ASME SA240/ASTM A240 UNS S43400

 

ASME SA240/ASTM A240 UNS S43400provides enhanced corrosion resistance in mild to moderately corrosive environments due to its 16.0-18.0% chromium and 0.75-1.25% molybdenum content, with a pitting resistance equivalent number (PREN) of ~17.5-20.5. Ideal for automotive trim and industrial equipment, it outperforms sa240/a240 uns s41003but is less resistant to severe chloride environments than sa240/a240 uns s44400. Its high-temperature oxidation resistance is comparable to sa240/a240 uns s43000.

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Weldability of ASME SA240/ASTM A240 UNS S43400

 

The low carbon content (≤ 0.12%) in ASME SA240/ASTM A240 UNS S43400 ensures good weldability by minimizing carbide precipitation, making it more weldable than martensitic grades like sa240/a240 uns s41500but less weldable than stabilized grades like sa240/a240 uns s43035. Suitable for TIG, MIG, and shielded metal arc welding, it uses low-carbon ferritic or austenitic fillers to maintain corrosion resistance and strength.

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ASME SA240/ASTM A240 UNS S43400 Stainless Steel Surface Finishes

 

Surface finishes enhance the versatility of ASME SA240/ASTM A240 UNS S43400 for automotive and industrial applications:

Surface Finish	Definition/Feature	Summary of Manufacturing Method	Application/Use
NO.1	Silver white, matte	Hot rolled, heat treated, and pickled	Industrial tanks, pipes, no gloss needed
2B	Stronger gloss than NO.2D	Cold rolled, heat treated, pickled, lightly polished	Automotive trim, industrial equipment
NO.2D/2BB	Silver white	Cold rolled, heat treated, pickled	Deep-drawn components, general materials
NO.3	Rough grinding	Polished with 100-120# abrasives (JIS R6001)	Building materials, automotive trim
NO.4 (4K)	Intermediate grinding	Polished with 150-180# abrasives (JIS R6001)	Architectural panels, decorative components
NO.240	Fine grinding	Ground with 240# abrasive belt	Precision components, decorative parts
NO.320	Very fine grinding	Ground with 320# abrasive belt	High-end industrial components
NO.400	Gloss close to BA	Polished with 400# wheel	Decorative trim, industrial fittings
HL	Hairline, continuous streaks	Polished with 150-240# abrasive	Architectural cladding, decorative components
BA (No.6/BA1/BA0)	Mirror-like, bright	Cold rolled with bright heat treatment	Decorative surfaces, high-end trim
NO.7	Near-mirror polishing	Polished with 600# rotary wheel	Art installations, decorative applications
NO.8 (Mirror/8K)	Shining mirror finish	Polished with fine wheels	Reflectors, architectural accents

These finishes make sa240/a240 uns s43400suitable for applications like BA for automotive trim or NO.4 for architectural panels.

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Chemical Composition of ASME SA240/ASTM A240 UNS S43400

The ASME SA240/ASTM A240 UNS S43400 chemical composition is optimized for corrosion resistance and weldability, compliant with sa240/a240 uns stainless grades.

Element	Percentage (%)
Chromium (Cr)	16.0 – 18.0
Molybdenum (Mo)	0.75 – 1.25
Carbon (C)	≤ 0.12
Manganese (Mn)	≤ 1.0
Silicon (Si)	≤ 1.0
Phosphorus (P)	≤ 0.040
Sulfur (S)	≤ 0.030
Nickel (Ni)	≤ 0.75
Iron (Fe)	Balance (~82%)

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Mechanical Properties of ASME SA240/ASTM A240 UNS S43400

 

The ASME SA240/ASTM A240 UNS S43400 mechanical properties balance strength and ductility, ideal for automotive and industrial applications. Annealing at 815-900°C (1500-1650°F) optimizes performance.

Property	Value at 20°C
Tensile Strength (MPa)	≥ 450 (65 ksi)
Yield Strength (MPa)	≥ 275 (40 ksi)
Elongation (%)	≥ 22
Hardness (HBW)	≤ 183
Density	7.70 g/cm³ (0.278 lb/in³)

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Specifications and Forms of ASME SA240/ASTM A240 UNS S43400

 

Gangsteel supplies sa240/a240 uns s43400in various forms, compliant with ASTM A240 and ASME SA240:

• Sheet and Plate: 0.1-6 mm (sheet), 0.5-50 mm (plate), width up to 2000 mm, length 2000-12000 mm. Finishes include 2B, No.1, No.4, BA.
• Coil: 0.1-6 mm thickness, up to 2000 mm width, for welded components.
• Bar: 6-300 mm diameter, up to 12000 mm length, hot-rolled or cold-drawn.
• Custom Components: Flanges, fittings, and stainless cutting sheet partwith ±0.05 mm tolerances.

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Applications of ASME SA240/ASTM A240 UNS S43400

 

ASME SA240/ASTM A240 UNS S43400excels in corrosion-resistant applications:

• Automotive Trim: Sheets for exterior trim, grilles, and decorative components.
• Industrial Equipment: Plates for chemical processing components.
• Architectural Panels: Cladding with aesthetic finishes.
• Structural Supports: Bars for industrial frameworks.
• Welded Components: Cost-effective for general use.

Case Study: An Indian architectural firm used UNS S43400 for cladding, saving 15% compared to sa240/a240 uns s44400.

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Comparison of ASME SA240/ASTM A240 UNS S43400 with Related Grades

 

This table compares sa240/a240 uns s43400with six ferritic grades:

Property	UNS S43400	UNS S41003	UNS S41008	UNS S42900	UNS S43000	UNS S43035	UNS S43932
UNS Number	S43400	S41003	S41008	S42900	S43000	S43035	S43932
Type	Ferritic	Ferritic	Ferritic	Ferritic	Ferritic	Ferritic	Ferritic
Chromium Content	16.0-18.0%	10.5-12.5%	11.5-13.5%	14.0-16.0%	16.0-18.0%	17.0-19.0%	17.0-19.0%
Nickel Content	≤ 0.75%	≤ 1.0%	≤ 0.60%	≤ 0.75%	≤ 0.75%	≤ 0.5%	≤ 0.5%
Manganese Content	≤ 1.0	≤ 1.5	≤ 1.0	≤ 1.0	≤ 1.0	≤ 1.0	≤ 1.0
Molybdenum Content	0.75-1.25%	-	-	-	-	-	-
Nitrogen Content	-	≤ 0.03%	-	-	-	≤ 0.03%	≤ 0.03%
Carbon Content	≤ 0.12%	≤ 0.03%	≤ 0.08%	≤ 0.12%	≤ 0.12%	≤ 0.03%	≤ 0.03%
Corrosion Resistance	Good	Good	Good	Good	Good	Excellent	Excellent
Strength	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate
Temp Range	Up to 815°C	Up to 650°C	Up to 650°C	Up to 675°C	Up to 815°C	Up to 815°C	Up to 815°C
Cost (USD/kg)	3.5-5.5	2.5-4	3-5	3-5	3-5	3-5	3-5
Applications	Automotive trim, industrial	Structural supports	Automotive, industrial	Appliances	Appliances	Automotive exhausts	Automotive exhausts

• UNS S43400 vs UNS S41003: Superior corrosion resistance due to molybdenum, unlike sa240/a240 uns s41003.
• UNS S43400 vs UNS S41008: Better pitting resistance than sa240/a240 uns s41008.
• UNS S43400 vs UNS S42900: Enhanced corrosion resistance compared to sa240/a240 uns s42900.
• UNS S43400 vs UNS S43000: Better pitting resistance due to molybdenum compared to sa240/a240 uns s43000.
• UNS S43400 vs UNS S43035: Less weldable than sa240/a240 uns s43035due to lack of stabilization.
• UNS S43400 vs UNS S43932: Lower weldability compared to sa240/a240 uns s43932.

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Equivalent Materials for ASME SA240/ASTM A240 UNS S43400

 

ASME SA240/ASTM A240 UNS S43400aligns with global standards:

Standard	Grade
UNS	S43400
W.Nr.	1.4113
EN	X6CrMo17-1
GB	06Cr17Mo
JIS	SUS 434
ASTM	A240
ASME	SA240

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Allowable Stress for ASME SA240/ASTM A240 UNS S43400

 

Per ASME BPVC Section II, Part D:

Temperature (°C)	Allowable Stress (MPa)
100	120
200	110
300	100
400	90
500	80

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Price of ASME SA240/ASTM A240 UNS S43400

 

The ASME SA240/ASTM A240 UNS S43400 price per kg is USD 3.5-5.5 per kg (FOB), competitive with sa240/a240 uns s43000. Contact admin@gangsteel.comfor quotes.

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Related Stainless Steel Grades

 

Gangsteel’s sa240/a240 uns stainless gradesportfolio includes:

• sa240/a240 uns s40500: Ferritic stainless steel for automotive and heat exchanger applications.
• sa240/a240 uns s40900: Ferritic stainless steel for automotive exhausts.
• sa240/a240 uns s40910: Ferritic stainless steel for cost-effective applications.
• sa240/a240 uns s40920: Ferritic stainless steel for automotive exhausts.
• sa240/a240 uns s40930: Ferritic stainless steel for general-purpose applications.
• sa240/a240 uns s40945: Ferritic stainless steel for corrosion-resistant applications.
• sa240/a240 uns s40975: Ferritic stainless steel for automotive components.
• sa240/a240 uns s40977: Ferritic stainless steel for cost-effective applications.
• sa240/a240 uns s41000: Martensitic stainless steel for high-strength applications.
• sa240/a240 uns s41003: Ferritic stainless steel for structural supports.
• sa240/a240 uns s41008: Ferritic stainless steel for automotive and industrial applications.
• sa240/a240 uns s41045: Ferritic stainless steel for corrosion-resistant applications.
• sa240/a240 uns s41050: Ferritic stainless steel for general-purpose applications.
• sa240/a240 uns s41500: Martensitic stainless steel for high strength and corrosion resistance.
• sa240/a240 uns s42035: Martensitic stainless steel for high-strength applications.
• sa240/a240 uns s42900: Ferritic stainless steel for corrosion resistance.
• sa240/a240 uns s43000: Ferritic stainless steel for appliances and trim.
• sa240/a240 uns s43035: Ferritic stainless steel for corrosion-resistant applications.
• sa240/a240 uns s43400: Ferritic stainless steel for automotive trim.
• sa240/a240 uns s43600: Ferritic stainless steel for corrosion-resistant applications.
• sa240/a240 uns s43932: Ferritic stainless steel for automotive and industrial applications.
• sa240/a240 uns s43940: Ferritic stainless steel for automotive and industrial applications.
• sa240/a240 uns s44500: Ferritic stainless steel for corrosion resistance.
• sa240/a240 uns s44626: Ferritic stainless steel for high-temperature corrosion resistance.
• sa240/a240 uns s44627: Ferritic stainless steel for high-temperature applications.
• sa240/a240 uns s44635: Ferritic stainless steel for corrosion and heat resistance.
• sa240/a240 uns s44660: Ferritic stainless steel for severe corrosive environments.
• sa240/a240 uns s44700: Ferritic stainless steel for high corrosion resistance.
• sa240/a240 uns s44735: Ferritic stainless steel for extreme corrosion resistance.
• sa240/a240 uns s44800: Ferritic stainless steel for high corrosion resistance.
• sa240/a240 uns s46800: Ferritic stainless steel for corrosion-resistant applications.

Note: These grades complement sa240/a240 uns s43400for various applications. Contact Gangsteelfor a full catalog.

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FAQ

 

Q: How does UNS S43400 compare to UNS S43035?

A: UNS S43400 offers better pitting resistance due to molybdenum, while sa240/a240 uns s43035provides superior weldability.

Q: Is UNS S43400 suitable for automotive trim?

A: Yes, its corrosion resistance and aesthetic appeal make it ideal compared to sa240/a240 uns s41003.

Q: Price difference with UNS S44400?

A: UNS S43400 is 10-20% less expensive than sa240/a240 uns s44400.

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Contact Us

 

Contact Gangsteelat admin@gangsteel.comfor sa240/a240 uns s43400quotes and solutions.

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