SS347
SS347 is a niobium-stabilized austenitic stainless steel related to SS304. Niobium stabilizes carbon, improving resistance to intergranular corrosion after welding or exposure in the sensitization temperature range.
SS347 Grade Information
SS347 is a niobium-stabilized austenitic stainless steel related to SS304. Niobium stabilizes carbon, improving resistance to intergranular corrosion after welding or exposure in the sensitization temperature range.
Aerospace flat-product specification for SS347. Review the material identity, supply condition and reference properties before preparing an enquiry.
| Material specification | AMS 5512 |
|---|---|
| Material identification | S34700 |
| Product / supply condition | Solution heat treated; verify thickness, finish and ordered revision. |
SS347 Chemical Composition
Manufacturer typical composition, mass %; selected elements only.
| Element / description | Mass % / reference value |
|---|---|
| C | 0.05 |
| Cr | 17.5 |
| Ni | 9.5 |
| Mo | — |
| Other | Nb stabilized |
SS347 Mechanical Properties
Published reference values for the stated form and condition. Typical values are not specification acceptance limits.
| Product form / condition | Tensile (MPa) | 0.2% proof / yield (MPa) | Elongation (%) | Data basis |
|---|---|---|---|---|
| Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 595 | 260 | 45 | Manufacturer typical values; elongation A5. |
Manufacturer reference data is shown for comparison. Use the selected AMS 5512 edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.
AMS 5512 Grade Reference
S34700
| Material specification | AMS 5512 |
|---|---|
| Source edition | AMS5512N |
| Product / supply condition | Solution heat treated; verify thickness, finish and ordered revision. |
| Comparison tables | View the AMS 5512 comparison tables |
| Material overview | View SS347 in Materials |
| Publisher reference | AMS 5512 publisher reference |
| Source reference | Parker Aerospace — controlled specification list (AMS forms and conditions) |
| Source reference | Outokumpu — Steel Grades, Properties and Global Standards, Tables 4, 5 and 7 |
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