436
Data under review436 is a niobium-stabilised ferritic stainless with the molybdenum addition of 434. The stabilisation makes it more suitable than 434 for welded parts in mildly corrosive service, such as water tanks.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.12 |
| Si | ≤1.00 |
| Mn | ≤1.00 |
| P | ≤0.040 |
| S | ≤0.030 |
| Cr | 16.00–18.00 |
| Mo | 0.75–1.25 |
| Nb | 5×C–0.80 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness | ≤192 HB (annealed) |
| Tensile strength | 450–630 MPa |
| Density | 7.70 g/cm³ |
| Magnetic | Yes |
Heat treatment
Anneal 790–870 °C, air cool. Niobium stabilisation improves weld-zone corrosion resistance versus 434.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | 436 |
Compare side by side: 436 vs 434 · 436 vs 439
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Hot-water tanks, solar water heaters, washing machine drums, automotive exhaust components.
Processing: Better weldability than 434 thanks to stabilisation; forming behaviour typical of 17% chromium ferritics.
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Ask for a quotationVisit NasteelSource: ASTM A240 published ranges (stabiliser detail per mill practice) · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.