Stainless Steel Honeycomb Core BRAZED
Grade
UNS S32100 · AISI/SAE 321
BRAZED = brazed-node 321 core
Nodes joined by nickel-base braze instead of resistance welds — highest node strength and full high-temperature capability for brazed sandwich assemblies.
Values for the BRAZED condition
Other Stainless Steel Honeycomb Core grades and fills
Stainless Steel Honeycomb Core is listed in 7 conditions; see the grade overview at Stainless Steel Honeycomb Core.
Compare all 7 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
1/4 in cell, 0.002 in foil, 4.0 pcf | Coarse cell, low density — heat shields, flow straighteners and low-load thermal spacers. | — | 4 | — | — |
1/8 in cell, 0.0015 in foil, 4.5 pcf | Lightest practical stainless core — weight-driven hot panels with modest crush loads. | — | 4 | — | — |
3/16 in cell, 0.002 in foil, 5.4 pcf | Larger cell, thicker foil — better foil handling and lower cost per area at moderate density. | — | 5 | — | — |
Perforated (acoustic) 321 core | Cell walls perforated for pressure venting and acoustic-liner (Helmholtz) sandwich construction. | — | 6 | — | — |
1/8-.002-8.0Default 1/8 in cell, 0.002 in foil, 8.0 pcf | Workhorse mid-density stainless core for hot structure and firewall sandwich panels. | — | 7 | — | — |
BRAZEDThis page Brazed-node 321 core | Nodes joined by nickel-base braze instead of resistance welds — highest node strength and full high-temperature capability for brazed sandwich assemblies. | — | 8 | — | — |
1/8 in cell, 0.003 in foil, 12.0 pcf | High-density core for high crush/shear load, hard points and blast or acoustic fatigue zones. | — | 12 | — | — |
What is Stainless Steel Honeycomb Core BRAZED?
Stainless Steel Honeycomb Core BRAZED is Stainless Steel Honeycomb Core in the BRAZED grade — nodes joined by nickel-base braze instead of resistance welds — highest node strength and full high-temperature capability for brazed sandwich assemblies. Stainless Steel Honeycomb Core BRAZED has a tensile strength of 8 MPa (1.1 ksi), weaker than 84% of composite grades. The elastic modulus is 1.5 GPa (0.218 Msi). Stainless Steel Honeycomb Core BRAZED has a density of 0.14 g/cm³ (0.0049 lb/in³), lighter than 84% of composite grades. 1/8-.002-8.0 is the default condition FabDigit quotes; BRAZED is available on request or by drawing note.
Advantages
- Good UV / weathering resistance — 100/100, better than 93% of composite grades
- High service temperature — 870°C (1,598 °F), better than 91% of composite grades
- Lightweight — 0.14 g/cm³ (0.0049 lb/in³), better than 84% of composite grades
Limitations
- Hard to polish — 10/100, worse than 97% of composite grades
- Low stiffness — 1.5 GPa (0.218 Msi), worse than 84% of composite grades
- Difficult to machine — 20/100, worse than 77% of composite grades
- Needs corrosion protection — 62/100, worse than 75% of composite grades
Stainless Steel Honeycomb Core BRAZED properties
Typical room-temperature values for Stainless Steel Honeycomb Core BRAZED; 11 are specific to this condition. Other listed values are Stainless Steel Honeycomb Core reference data and may not represent this condition. Bars are the position among composite grades.
Physical1
Stainless Steel Honeycomb Core BRAZED has a density of 0.14 g/cm³ (0.0049 lb/in³), lighter than 84% of composite grades.
Mechanical6
Stainless Steel Honeycomb Core BRAZED has a tensile strength of 8 MPa (1.1 ksi), weaker than 84% of composite grades. The elastic modulus is 1.5 GPa (0.218 Msi).
Thermal7
Stainless Steel Honeycomb Core BRAZED is rated for continuous service to 870°C (1,598 °F). It conducts heat at 0.33 W/m·K (0.191 BTU/hr·ft·°F), worse than 53% of composite grades. Thermal expansion is 16.6 µm/m·K (9.22 µin/in·°F).
Electrical1
Stainless Steel Honeycomb Core BRAZED has an electrical resistivity of 4.2×10⁻⁵ Ω·m.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 75% of composite grades. UV resistance is excellent.
Sustainability3
Producing a kilogram of Stainless Steel Honeycomb Core BRAZED takes about 85 MJ of energy and emits 7 kg of CO₂ — less than 79% of composite grades. Typical recycled content is 45%.
Manufacturability2
Stainless Steel Honeycomb Core BRAZED's machinability is poor (20/100, worse than 77% of composite grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Stainless Steel Honeycomb Core BRAZED
Is Stainless Steel Honeycomb Core easy to machine?
Cut with EDM wire, waterjet, abrasive band or high-speed router with the core potted in wax/ice; unsupported foil crushes and burrs easily.
Can Stainless Steel Honeycomb Core be welded?
Node joints are resistance-welded or Ni-braze furnace-joined; face sheets are attached by brazing, spot welding or high-temperature polyimide/ceramic adhesive rather than epoxy.
Can Stainless Steel Honeycomb Core be formed, bent or molded?
Expandable slice or corrugated block; formable to single curvature by roll-forming, compound curvature needs shaped-block machining or heat forming.
What surface finishes work on Stainless Steel Honeycomb Core?
Passivate per ASTM A967 after fabrication; no plating or painting normally applied, degrease and pickle braze residues before bonding.
Stainless Steel Honeycomb Core chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CASTM A240 Type 321 | ≤ 0.08 | 0.05 |
| Mn | ≤ 2 | 1.2 |
| Si | ≤ 0.75 | 0.5 |
| P | ≤ 0.05 | — |
| S | ≤ 0.03 | — |
| Cr | 17 – 19 | 18 |
| Ni | 9 – 12 | 10.5 |
| Ti≥5×(C+N) for stabilization | 0.2 – 0.7 | 0.4 |
| N | ≤ 0.1 | 0.02 |
| Fe | balance | — |
Stainless Steel Honeycomb Core BRAZED — frequently asked
What is Stainless Steel Honeycomb Core BRAZED used for?
Stainless Steel Honeycomb Core BRAZED is typically used for jet engine acoustic panels, exhaust/nacelle sandwich structures and high-temperature industrial furnace panels. In short: 815 °C metallic core; weld/braze-joined stainless honeycomb; heavier than aluminium core.
What is the tensile strength of Stainless Steel Honeycomb Core BRAZED?
Stainless Steel Honeycomb Core BRAZED has a typical tensile strength of 8 MPa (1.1 ksi) — weaker than 84% of composite grades. Strength varies by condition: see the 7 listed tempers.
Is Stainless Steel Honeycomb Core BRAZED easy to machine?
Not especially — machinability is rated poor (20/100, worse than 77% of composite grades). Cut with EDM wire, waterjet, abrasive band or high-speed router with the core potted in wax/ice; unsupported foil crushes and burrs easily.
Can Stainless Steel Honeycomb Core BRAZED be welded?
Node joints are resistance-welded or Ni-braze furnace-joined; face sheets are attached by brazing, spot welding or high-temperature polyimide/ceramic adhesive rather than epoxy.
What surface finishes work on Stainless Steel Honeycomb Core BRAZED?
Passivate per ASTM A967 after fabrication; no plating or painting normally applied, degrease and pickle braze residues before bonding.
Can Stainless Steel Honeycomb Core BRAZED be formed, bent or molded?
Expandable slice or corrugated block; formable to single curvature by roll-forming, compound curvature needs shaped-block machining or heat forming.
What is the maximum service temperature of Stainless Steel Honeycomb Core BRAZED?
Stainless Steel Honeycomb Core BRAZED is rated for continuous use to about 870°C (1,598 °F), and briefly to 1,000°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A240/A240M – Type 321 chromium-nickel stainless plate, sheet and strip — ASTM (2023)
- ASTM C365 – Flatwise Compressive Properties of Sandwich Cores — ASTM (2022)
- ASTM C273 – Shear Properties of Sandwich Core Materials — ASTM (2020)
- Stainless steel (321) honeycomb core datasheets — Plascore / Benecor / Hexcel (2023)
- ASM Handbook Vol. 1 – Properties of stainless steels — ASM International (1990)
- MIL-HDBK-23 Structural Sandwich Composites (core mechanics scaling) — US DoD (1968)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.