SUS436L Ferritic Stainless Steel Plate/Coil
SUS436L Ferritic Stainless Steel Plate/Coil - Composition, Properties & Applications
Comprehensive data for SUS436L ferritic stainless steel: chemical composition, mechanical and physical properties, international equivalents (AISI 436L, EN 1.4526), and application guidance for automotive exhaust systems and kitchen equipment.
Cold forming, bending, deep drawing, welding (TIG, MIG, resistance), machining
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SUS436L Ferritic Stainless Steel Plate/Coil Introduction
SUS436L is an ultra-low carbon, titanium- or niobium-stabilized ferritic stainless steel containing molybdenum. It offers excellent corrosion resistance superior to standard ferritic grades like SUS430, combined with good formability and weldability. The stabilization with Ti or Nb prevents intergranular corrosion in the heat-affected zone, making it suitable for welding without post-weld heat treatment. Typical applications include automotive exhaust systems, heat exchangers, and kitchenware. Its low thermal expansion and good high-temperature oxidation resistance are key advantages.
SUS436L Ferritic Stainless Steel Plate/Coil Chemical Composition
The chemical composition of SUS436L according to JIS G4305 standard. The steel is stabilized with titanium (Ti) or niobium (Nb) to prevent sensitization during welding. Carbon and nitrogen contents are kept extremely low to enhance corrosion resistance and formability. Molybdenum is added to improve pitting resistance.
| Element | Content (wt%) | Remarks |
|---|---|---|
| C | ≤ 0.025 | |
| Si | ≤ 1.00 | |
| Mn | ≤ 1.00 | |
| P | ≤ 0.040 | |
| S | ≤ 0.030 | |
| Cr | 16.00 - 19.00 | |
| Mo | 0.75 - 1.25 | |
| N | ≤ 0.025 | |
| Ti | 8×(C+N) ~ 0.80 | Optional; when Nb is omitted |
| Nb | 10×C ~ 0.80 | Optional; when Ti is omitted |
SUS436L Ferritic Stainless Steel Plate/Coil Physical Properties
Physical properties of SUS436L ferritic stainless steel. The density is lower than that of austenitic grades, and the thermal expansion coefficient is lower, providing better dimensional stability under thermal cycling. Thermal conductivity is higher than austenitic types, beneficial for heat exchanger applications. The steel is magnetic.
| Property | Value | Unit | Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7.70 | g/cm³ | At 20°C |
| Elastic modulus (E) | 200 | GPa | At 20°C |
| Shear modulus (G) | 78 | GPa | At 20°C |
| Poisson's ratio (ν) | 0.30 | At 20°C | |
| Thermal expansion coefficient (α) | 10.4 | 10⁻⁶/K | 20 - 100°C |
| Thermal expansion coefficient (α) | 11.5 | 10⁻⁶/K | 20 - 500°C |
| Thermal conductivity (λ) | 26.3 | W/m·K | At 100°C |
| Specific heat capacity (c) | 460 | J/kg·K | 0 - 100°C |
| Electrical resistivity (ρₑ) | 0.60 | μΩ·m | At 20°C |
SUS436L Ferritic Stainless Steel Plate/Coil Mechanical Properties
Mechanical properties of solution-annealed (annealed) SUS436L sheet and plate as per JIS G4305 and G4304. Values apply to thickness ≤ 8 mm. The steel exhibits good strength combined with ductility, making it suitable for forming and deep drawing operations. Hardness is controlled for fabrication requirements.
| Property | Value | Unit | Condition / Remarks |
|---|---|---|---|
| Yield strength (0.2% offset) | ≥ 245 | MPa | Annealed, thickness ≤ 8 mm |
| Tensile strength (Rm) | ≥ 410 | MPa | Annealed, thickness ≤ 8 mm |
| Elongation (A) | ≥ 20 | % | Gauge length 50 mm, thickness ≤ 8 mm |
| Hardness | ≤ 200 | HV | Determined by conversion from HB |
| Hardness | ≤ 187 | HB | Annealed |
| Bend test (180°) | d = 1a (no cracks) | d = bend diameter, a = specimen thickness |
SUS436L Ferritic Stainless Steel Plate/Coil Exact Equivalent Material Standards and Substitute Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4304, G4305 | SUS436L | Original Japanese standard |
| USA | ASTM A240/A240M | 436L (UNS S43600) | Identical composition; also recognized in ASME |
| Europe | EN 10088-2 | 1.4526 (X2CrMoTi18-2) | Chemically equivalent; Ti-stabilized |
| China | GB/T 3280 | S11873 (022Cr18Ti) | Close match but may have minor composition differences; check specification |
| International | ISO 15510 | X2CrMoTi18-2 | ISO equivalent to EN 1.4526 |
SUS436L Ferritic Stainless Steel Plate/Coil Application Introduction
SUS436L is widely used in environments requiring good weldability, formability, and resistance to corrosion and high temperatures. Its stabilization and Mo addition expand its applicability beyond standard ferritic grades.
Product Applications: Automotive exhaust pipes and mufflers, Heat exchanger tubes and plates, Kitchen sinks and countertops, Washing machine tubs, Flue gas ducts, Storage tanks for mildly corrosive chemicals
Processed into products: Welded exhaust system components: pipes, silencers, flanges, Deep-drawn sinks and basins, Formed heat exchanger plates, Precision bent brackets and supports, Decorative trim strips, Small stamped parts for appliances
Application industries: Automotive industry (exhaust gas systems, mufflers, catalytic converter shells), Heat exchangers and boiler components, White goods (washing machine drums, dishwasher interiors), Kitchen equipment (sinks, countertops, cookware), Architecture and construction (roofing, cladding, decorative panels), Food and beverage processing equipment
SUS436L Ferritic Stainless Steel Plate/Coil Similar / Alternative Materials with Comparable Properties
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4305 | SUS430LX | 17Cr-Ti, no Mo, lower corrosion resistance but cheaper; good formability |
| Japan / USA | JIS / ASTM | SUS430 / AISI 430 | 17Cr, no stabilizers, susceptible to sensitization; limited weldability |
| Japan / Europe | JIS / EN | SUS444 / 1.4521 (X2CrMoTi18-2-4) | 18Cr-2Mo-Ti, higher Mo for better pitting resistance; often used in similar applications |
| USA | ASTM | Type 439 (UNS S43035) | 17-19Cr, Ti-stabilized, lower Mo than 436L; good for exhaust systems |
| Europe | EN | 1.4509 (X2CrTiNb18) | Nb-Ti stabilized 18Cr, no Mo; an economical alternative for less corrosive environments |
Notes:
SUS436L is fully ferritic at all temperatures and is magnetic. It can be welded using standard methods for stainless steel without preheating. Post-weld annealing is generally not required due to stabilization. For optimal corrosion resistance, surfaces should be pickled and passivated after welding. The steel is not hardenable by heat treatment.
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