ASME SA240 436 Stainless Steel Plate | SA240 Type 436
What is ASME SA240 436 Stainless Steel Plate?
As a professional stainless steel plate supplier and China Mill-Direct Supply / Mill Direct Exporter, SHH STEEL is pleased to present ASME SA240 436 Stainless Steel Plate, also known as SA240 Type 436.
ASME SA240 Type 436 is a ferritic stainless steel that combines the benefits of molybdenum addition with niobium (columbium) stabilization. Based on a 16–18% chromium composition, it contains molybdenum to improve pitting and crevice corrosion resistance (similar to Type 434) and niobium to stabilize carbon and nitrogen, providing excellent resistance to intergranular corrosion after welding. This dual improvement makes Type 436 superior to both standard Type 430 and Type 434 in welded applications exposed to mildly corrosive or chloride-containing environments.
Type 436 is magnetic and cannot be hardened by heat treatment. It offers good formability and oxidation resistance while remaining more economical than austenitic grades. It is commonly used in automotive exhaust systems, exterior trim, heat exchangers, and other components requiring a balance of improved corrosion resistance, weldability, and cost-effectiveness.
SHH STEEL supplies ASME SA240 436 as true Mill Direct Supply, sourcing directly from major Chinese stainless steel mills. This model delivers competitive mill pricing, consistent quality, full heat traceability and shorter lead times. We offer a practical dimensional range and a selection of surface finishes to meet both industrial and aesthetic requirements.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | ASME SA240 / SA240M | Full compliance |
| Steel Grade | Type 436 (UNS S43600) | Confirmed |
| Product Form | Plate, Sheet, Coil | Available |
| Delivery Condition | Annealed | Standard |
| Thickness Range | 0.4 mm – 50 mm (thicker available on request) | Custom sizes supported |
| Width | Up to 1500–2000 mm (wider on request) | Available |
| Length | Up to 6000 mm or cut-to-length / coil | Available |
| Surface Finish | 2B, BA, No.1, No.4, HL, Polished | Available |
| Certification | EN 10204 3.1 / ASME Mill Test Certificate | Available |
Chemical Composition
Heat Analysis (Ladle Analysis) according to ASME SA240 Type 436:
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 |
| Molybdenum (Mo) | 0.75 – 1.25 |
| Nickel (Ni) | ≤ 0.60 |
| Niobium (Nb) | ≥ 5 × C% and ≤ 0.80 |
| Iron (Fe) | Balance |
Product Analysis (typical permissible variations):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 15.90 – 18.10 |
| Molybdenum (Mo) | 0.75 – 1.25 |
| Nickel (Ni) | ≤ 0.60 |
| Niobium (Nb) | ≥ 5 × C% and ≤ 0.80 |
The combination of molybdenum (for improved pitting resistance) and niobium stabilization (for resistance to intergranular corrosion) is the defining feature of Type 436. This makes it a higher-performance ferritic grade compared with both 430 and 434.
Mechanical Properties
Annealed Condition (typical)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 450 MPa (65 ksi) |
| Yield Strength (0.2%) | ≥ 205 MPa (30 ksi) |
| Elongation (in 50 mm) | ≥ 22% |
| Hardness | ≤ 183 HB |
Physical Properties
- Density: approximately 7.70–7.80 g/cm³
- Magnetic: Magnetic in all conditions
- Melting Range: approximately 1425–1510°C
Type 436 cannot be hardened by quenching and tempering. Strength is obtained in the annealed condition, with possible moderate increases through cold working.
Material Comparison
| Grade | Structure | Key Features | Primary Advantage | Typical Preference |
|---|---|---|---|---|
| SA240 Type 430 | Ferritic | 16–18% Cr | Economical baseline | General ferritic applications |
| SA240 Type 434 | Ferritic | 16–18% Cr + Mo | Improved pitting resistance | Better chloride resistance than 430 |
| SA240 Type 436 | Ferritic | 16–18% Cr + Mo + Nb | Improved pitting + excellent weldability | Welded applications needing better corrosion |
| SA240 Type 439 | Ferritic | 17–19% Cr + Ti | Excellent intergranular corrosion resistance | Automotive exhaust, welded ferritic |
| SA240 Type 304 | Austenitic | 18Cr-8Ni | Superior general corrosion resistance | More demanding corrosive service |
ASME SA240 436 is selected when both improved pitting resistance (from molybdenum) and good resistance to intergranular corrosion after welding (from niobium stabilization) are required. It offers a performance upgrade over astm a240 type 430 stainless steel sheet plate and astm a240 type 434 stainless steel sheet plate. For applications focused mainly on weldability and exhaust systems, astm a240 type 439 stainless steel sheet plate is a strong alternative. For maximum corrosion resistance, austenitic grades such as astm a240 type 304 stainless steel sheet plate are preferred.
Corrosion Resistance
ASME SA240 Type 436 provides good resistance to atmospheric corrosion, fresh water, and many mild chemical environments. The molybdenum addition significantly improves resistance to pitting and crevice corrosion in chloride-containing atmospheres compared with Type 430. The niobium stabilization ensures excellent resistance to intergranular corrosion after welding.
It also offers very good oxidation resistance at elevated temperatures. While superior to standard 430 and 434 in many welded or mildly chloride-exposed applications, it is still not suitable for severe seawater or highly aggressive chloride service, where austenitic or duplex grades should be used.
Weldability
ASME SA240 Type 436 has good weldability for a ferritic stainless steel, thanks to niobium stabilization. The risk of intergranular corrosion in the heat-affected zone is greatly reduced compared with unstabilized grades.
Low heat input and proper joint design are recommended to control grain growth. Matching or suitable ferritic/austenitic filler metals can be used. Overall, Type 436 is one of the more weldable molybdenum-bearing ferritic grades.
Heat Treatment
Type 436 is a ferritic stainless steel and cannot be hardened by quenching and tempering.
Annealing
- Temperature: typically 760 – 850°C
- Cooling: Air cool or furnace cool
Annealing is performed to relieve stresses after cold working or welding, restore ductility, and optimize corrosion resistance. Excessive time at high temperature should be avoided to limit grain growth.
Surface Finishes
| Finish | Description | Typical Use / Keywords |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | SA240 436 2B – most common for general fabrication |
| BA | Bright Annealed | SA240 436 BA – decorative and automotive applications |
| No.1 | Hot-rolled, annealed and pickled | SA240 436 No.1 – industrial plate |
| No.4 | Brushed (satin) finish | SA240 436 No.4 – architectural and visible surfaces |
| HL | Hairline finish | SA240 436 HL – decorative panels |
| Polished | Mirror or custom polish | SA240 436 Polished – high-end decorative use |
SHH STEEL regularly supplies ASME SA240 436 in 2B and BA finishes, and can provide other finishes according to project requirements.
Tolerances
Dimensional tolerances for ASME SA240 436 Stainless Steel Plate conform to ASME SA240 and the general requirements of ASTM A480.
Typical available size range for SA240 436 plate/sheet:
- Thickness: 0.4 mm – 50 mm (thicker plates available on request)
- Width: up to 1500–2000 mm (wider on request)
- Length: up to 6000 mm or supplied in coil / cut-to-length
Thickness, width, length and flatness tolerances are controlled within standard limits. Tighter tolerances for SA240 436 plate can be arranged for specific project needs. SHH STEEL provides precise dimensional control for both standard and custom-size SA240 436 material.
Equivalent Material Grades
| Grade / Designation | Standard | Notes |
|---|---|---|
| SA240 Type 436 | ASME SA240 | — |
| A240 Type 436 | ASTM A240 | Essentially identical |
| UNS S43600 | — | Unified Numbering System |
| 1.4526 / X6CrMoNb17-1 | EN 10088-2 | European equivalent |
| SUS436L / related | JIS | Japanese related grades |
| Related Mo + Nb ferritic | GB/T | Chinese approximate equivalents |
Related grades frequently evaluated with ASME SA240 436 include astm a240 type 430 stainless steel sheet plate, astm a240 type 434 stainless steel sheet plate, astm a240 type 439 stainless steel sheet plate, and astm a240 type 304 stainless steel sheet plate.
Applications
ASME SA240 Type 436 is used where improved pitting resistance and good weldability are both required. Typical applications of SA240 436 include:
| Industry / Sector | Typical Components / Equipment (with keywords) |
|---|---|
| Automotive Exhaust | SA240 436 exhaust components, pipes and related parts |
| Automotive Trim | SA240 436 exterior moldings and decorative trim |
| Heat Exchangers | SA240 436 heat exchanger components in mild environments |
| Appliances | SA240 436 panels and components requiring better corrosion resistance |
| Architecture | SA240 436 cladding and decorative elements |
| General Fabrication | SA240 436 welded and formed structures in moderately corrosive service |
| Industrial Equipment | SA240 436 parts needing Mo + stabilization benefits |
Why Choose SHH STEEL
SHH STEEL is a China Mill-Direct Supply and Mill Direct Exporter of stainless steel plate. We maintain long-term strategic cooperation with major Chinese stainless steel mills and supply ASME SA240 Type 436 with the following advantages:
- Competitive mill-direct pricing
- Consistent quality and complete heat traceability
- Full Mill Test Certificates (EN 10204 3.1 / ASME)
- Flexible dimensions and surface finishes (including SA240 436 2B, SA240 436 BA and SA240 436 No.1)
- Technical support for stabilized molybdenum-bearing ferritic material selection
- Reliable worldwide logistics and export documentation
FAQ
- What is the main advantage of SA240 436 over SA240 430 and 434?ype 436 combines molybdenum (for better pitting resistance) with niobium stabilization (for excellent resistance to intergranular corrosion after welding). SHH STEEL recommends 436 when both improved localized corrosion resistance and good weldability are required.
- Is ASME SA240 436 magnetic?Yes, Type 436 is magnetic in all conditions. SHH STEEL supplies material that meets this characteristic.
- Can SA240 436 be hardened by heat treatment?No. As a ferritic stainless steel, it cannot be hardened by quenching and tempering. SHH STEEL supplies material in the annealed condition as standard.
- What is the density of SA240 Type 436?Approximately 7.70–7.80 g/cm³. SHH STEEL provides material certificates confirming physical and mechanical properties.
- Can SHH STEEL supply dual-certified ASME SA240 / ASTM A240 Type 436?Yes, SHH STEEL commonly supplies dual-certified ASME SA240 / ASTM A240 Type 436 material.
Conclusion
ASME SA240 436 Stainless Steel Plate (SA240 Type 436) is a molybdenum-bearing, niobium-stabilized ferritic stainless steel that offers an excellent combination of improved pitting resistance and superior resistance to intergranular corrosion after welding. It is a high-performance ferritic grade suitable for automotive, heat exchanger and general fabrication applications where standard 430 or 434 is no longer sufficient.
As a professional China Mill-Direct Supply and Mill Direct Exporter, SHH STEEL provides high-quality ASME SA240 Type 436 plate with competitive pricing, full certification and complete technical support.
Contact SHH STEEL today for stock availability, surface finish options (including SA240 436 2B, SA240 436 BA and SA240 436 No.1), or a competitive quotation.
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