ASME SA240 ASTM A240 UNS S44635 Stainless Steel sheet

 

ASME SA240 / ASTM A240 UNS S44635 Stainless Steel Sheet plate strip supplier in China

 

Gangsteel introduces sa240/a240 uns s44635, a super-ferritic stainless steel sheet engineered for exceptional corrosion resistance and high-temperature performance. Compliant with sa240/a240 uns stainless grades standards, including ASTM A240 and ASME SA240, UNS S44635 excels in demanding applications like chemical processing, power generation, and marine environments. As a premier uns stainless supplier, Gangsteel maintains an inventory exceeding 600 tons and utilizes advanced manufacturing to deliver precise, tailored solutions globally with rapid delivery.

Gangsteel provides a comprehensive analysis of ASME SA240/ASTM A240 UNS S44635, detailing its chemical composition, density, mechanical properties, corrosion resistance, weldability, surface finishes, equivalent materials, specifications, applications, and pricing per kg.Ideal for engineers and procurement specialists, UNS S44635 offers a robust solution for harsh environments. Discover complementary grades like sa240/a240 uns s41003 to meet diverse project requirements.

Why Choose ASME SA240/ASTM A240 UNS S44635 Stainless Steel Sheet?

 

ASME SA240/ASTM A240 UNS S44635, a super-ferritic stainless steel, features 25.0-27.0% chromium, 3.5-4.5% molybdenum, 3.5-4.5% nickel, and niobium/titanium stabilization, delivering outstanding corrosion resistance, good weldability, and enhanced strength. Designed for severe corrosive and high-temperature environments, such as chemical reactors and heat exchangers, it benefits from stabilization and low carbon content (≤ 0.025%) to prevent carbide precipitation during welding, outperforming non-stabilized grades like sa240/a240 uns s43000. Its ferritic structure ensures excellent scaling resistance up to 1050°C (1922°F).

Gangsteel highlights that UNS S44635 offers superior corrosion resistance compared to sa240/a240 uns s41008 due to higher chromium, molybdenum, and nickel content, and it is competitive with super-ferritic grades like sa240/a240 uns s44700. Its enhanced strength makes it ideal for demanding applications.

Key benefits include:

• Outstanding Corrosion Resistance: High chromium (25.0-27.0%) and molybdenum (3.5-4.5%) ensure exceptional performance in corrosive environments, surpassing sa240/a240 uns s42900.
• Good Weldability: Stabilization enhances weldability compared to sa240/a240 uns s44400.
• High Heat Resistance: Suitable for temperatures up to 1050°C (1922°F), outperforming sa240/a240 uns s43035.
• Enhanced Strength: Higher nickel content improves strength compared to sa240/a240 uns s44626.

Case Study: A European chemical plant used UNS S44635 sheets for reactor linings, achieving a 20% cost reduction compared to sa240/a240 uns s44660 while maintaining superior corrosion resistance.

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ASME SA240/ASTM A240 UNS S44635 Density

 

Gangsteel confirms that the density of ASME SA240/ASTM A240 UNS S44635 is approximately 7.80 g/cm³ (0.282 lb/in³), slightly higher than standard ferritic grades due to its nickel content, compared to sa240/a240 uns s41003 (7.70 g/cm³) and sa240/a240 uns s42035 (7.75 g/cm³). This density supports precise weight calculations for chemical processing equipment.

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Corrosion Resistance of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel emphasizes that ASME SA240/ASTM A240 UNS S44635 offers outstanding corrosion resistance in highly corrosive environments due to its 25.0-27.0% chromium, 3.5-4.5% molybdenum, and 3.5-4.5% nickel content, with a pitting resistance equivalent number (PREN) of ~36.0-40.5. Ideal for chemical processing and marine applications, it outperforms sa240/a240 uns s41008 and sa240/a240 uns s44400 in chloride-rich environments. Its high-temperature oxidation resistance is superior to sa240/a240 uns s43000.

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Weldability of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel notes that the low carbon content (≤ 0.025%) and niobium/titanium stabilization in ASME SA240/ASTM A240 UNS S44635 ensure good weldability, minimizing carbide precipitation. It outperforms martensitic grades like sa240/a240 uns s41500 and is comparable to sa240/a240 uns s43035. Suitable for TIG, MIG, and shielded metal arc welding, it uses stabilized or low-carbon ferritic fillers.

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ASME SA240/ASTM A240 UNS S44635 Stainless Steel Surface Finishes

 

Gangsteel offers a range of surface finishes for ASME SA240/ASTM A240 UNS S44635 to enhance its versatility:

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

These finishes make sa240/a240 uns s44635 suitable for applications like 2B for chemical equipment or NO.4 for panels.

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Chemical Composition of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel ensures that the ASME SA240/ASTM A240 UNS S44635 chemical composition is optimized for corrosion resistance and weldability, compliant with sa240/a240 uns stainless grades.

Element	Percentage (%)
Chromium (Cr)	25.0 – 27.0
Molybdenum (Mo)	3.5 – 4.5
Nickel (Ni)	3.5 – 4.5
Niobium (Nb) + Titanium (Ti)	0.20 – 0.80
Carbon (C)	≤ 0.025
Manganese (Mn)	≤ 1.0
Silicon (Si)	≤ 0.75
Phosphorus (P)	≤ 0.040
Sulfur (S)	≤ 0.030
Nitrogen (N)	≤ 0.035
Iron (Fe)	Balance (~60%)

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Mechanical Properties of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel notes that the ASME SA240/ASTM A240 UNS S44635 mechanical properties balance strength and corrosion resistance, ideal for high-temperature applications. Annealing at 870-950°C (1600-1742°F) optimizes performance.

Property	Value at 20°C
Tensile Strength (MPa)	≥ 550 (80 ksi)
Yield Strength (MPa)	≥ 380 (55 ksi)
Elongation (%)	≥ 20
Hardness (HBW)	≤ 220
Density	7.80 g/cm³ (0.282 lb/in³)

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Specifications and Forms of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel supplies sa240/a240 uns s44635 in 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 part with ±0.05 mm tolerances.

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Applications of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel highlights that ASME SA240/ASTM A240 UNS S44635 excels in severe corrosive and high-temperature applications:

• Chemical Processing: Reactor linings and heat exchangers.
• Power Generation: Boiler components and exhaust systems.
• Marine Applications: Components in chloride-rich environments.
• Structural Supports: Bars for high-temperature frameworks.
• Welded Components: Robust for severe environments.

Case Study: A European power plant used UNS S44635 for boiler components, saving 15% compared to sa240/a240 uns s44660.

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Comparison of ASME SA240/ASTM A240 UNS S44635 with Related Grades

 

Gangsteel presents a comparison of sa240/a240 uns s44635 with six ferritic grades:

Property	UNS S44635	UNS S41003	UNS S41008	UNS S42900	UNS S43000	UNS S43035	UNS S44400
UNS Number	S44635	S41003	S41008	S42900	S43000	S43035	S44400
Type	Ferritic	Ferritic	Ferritic	Ferritic	Ferritic	Ferritic	Ferritic
Chromium Content	25.0-27.0%	10.5-12.5%	11.5-13.5%	14.0-16.0%	16.0-18.0%	17.0-19.0%	17.5-19.5%
Nickel Content	3.5-4.5%	≤ 1.0%	≤ 0.60%	≤ 0.75%	≤ 0.75%	≤ 0.5%	≤ 1.0%
Manganese Content	≤ 1.0	≤ 1.5	≤ 1.0	≤ 1.0	≤ 1.0	≤ 1.0	≤ 1.0
Molybdenum Content	3.5-4.5%	-	-	-	-	-	1.75-2.50%
Nitrogen Content	≤ 0.035%	≤ 0.03%	-	-	-	≤ 0.03%	≤ 0.035%
Carbon Content	≤ 0.025%	≤ 0.03%	≤ 0.08%	≤ 0.12%	≤ 0.12%	≤ 0.03%	≤ 0.025%
Corrosion Resistance	Outstanding	Good	Good	Good	Good	Excellent	Excellent
Strength	High	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate
Temp Range	Up to 1050°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)	4.5-6.5	2.5-4	3-5	3-5	3-5	3-5	3.6-6
Applications	Chemical processing, power generation	Structural supports	Automotive, industrial	Appliances	Appliances	Automotive exhausts	Chemical processing

• UNS S44635 vs UNS S41003: Outstanding corrosion resistance compared to sa240/a240 uns s41003.
• UNS S44635 vs UNS S41008: Superior performance than sa240/a240 uns s41008.
• UNS S44635 vs UNS S42900: Enhanced corrosion resistance compared to sa240/a240 uns s42900.
• UNS S44635 vs UNS S43000: Better corrosion and heat resistance than sa240/a240 uns s43000.
• UNS S44635 vs UNS S43035: Superior corrosion resistance and strength compared to sa240/a240 uns s43035.
• UNS S44635 vs UNS S44400: Better corrosion resistance due to higher molybdenum and nickel compared to sa240/a240 uns s44400.

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Equivalent Materials for ASME SA240/ASTM A240 UNS S44635

 

Gangsteel ensures ASME SA240/ASTM A240 UNS S44635 aligns with global standards:

Standard	Grade
UNS	S44635
W.Nr.	1.4762
EN	X10CrNiMoNb25-25
GB	022Cr26Mo4Ni4
JIS	SUS 447J1
ASTM	A240
ASME	SA240

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Allowable Stress for ASME SA240/ASTM A240 UNS S44635

 

Per ASME BPVC Section II, Part D, Gangsteel confirms:

Temperature (°C)	Allowable Stress (MPa)
100	135
200	125
300	115
400	105
500	95

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Price of ASME SA240/ASTM A240 UNS S44635

 

Gangsteel offers ASME SA240/ASTM A240 UNS S44635 at USD 4.5-6.5 per kg (FOB), slightly higher than sa240/a240 uns s44400 (USD 3.6-6) due to higher molybdenum and nickel content. Contact admin@gangsteel.com for quotes.

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Related Stainless Steel Grades

 

Gangsteel’s sa240/a240 uns stainless grades portfolio 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 s44635 for various applications. Contact Gangsteel for a full catalog.

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FAQ

 

Q: How does UNS S44635 compare to UNS S44400 in terms of corrosion resistance and strength?

A: UNS S44635, with 25.0-27.0% chromium, 3.5-4.5% molybdenum, and 3.5-4.5% nickel, offers superior corrosion resistance (PREN ~36.0-40.5) and higher strength (tensile strength ≥ 550 MPa) compared to sa240/a240 uns s44400 (PREN ~20.5-24.5, tensile strength ≥ 415 MPa). Its higher alloy content makes it ideal for severe corrosive environments like chemical processing, while UNS S44400 suits milder conditions like automotive exhausts.

Q: Is UNS S44635 suitable for chemical processing applications, and how does it compare to UNS S41003?

A: Yes, sa240/a240 uns s44635 is highly suitable for chemical processing due to its outstanding corrosion resistance and high-temperature stability up to 1050°C (1922°F). Compared to sa240/a240 uns s41003, which has lower chromium (10.5-12.5%) and no molybdenum, UNS S44635 offers significantly better corrosion resistance, making it ideal for harsh environments, while UNS S41003 is better for structural applications.

Q: What is the price difference between UNS S44635 and UNS S44700, and what drives this difference?

A: UNS S44635 is priced at USD 4.5-6.5 per kg (FOB), approximately 10-15% less expensive than sa240/a240 uns s44700 (USD 5-7.5 per kg) due to differences in alloy content and processing complexity. UNS S44700 has higher chromium (28.0-30.0%) and stricter impurity controls, increasing its cost. Factors like market demand, raw material availability, and production scale also influence the price difference.

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Contact Us

 

Gangsteel invites you to contact them at admin@gangsteel.com for sa240/a240 uns s44635 quotes and custom solutions.

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