Precious Metal Pt95Rh5 gauze
also Pt-Rh gauze catalyst
Pt95Rh5 gauze is platinum alloyed with 5 % rhodium, drawn to fine wire and woven or knitted into catalyst gauze, often packed together with palladium gauze.
Reference datasheet — Pt95Rh5 gauze is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Pt95Rh5 gauze tempers and conditions
Pt95Rh5 gauze is supplied in 3 conditions, soft to hard.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Soft weaving/knitting stock and thermocouple-grade wire; pick when maximum ductility and formability are needed. | 130 | 340 | 33 | 78 HB | — |
Half hard | Compromise temper for wire that must be handled/woven without kinking but still needs some spring and strength. | 380 | 500 | 10 | 110 HB | 9.5 % IACS |
Full hard | Maximum-strength as-drawn wire for weaving fine gauze and for spring/lead applications; anneals in service above ~800 °C. | 600 | 690 | 2 | 143 HB | 9.3 % IACS |
Supply forms, finishes and certifications
Ways Pt95Rh5 gauze is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
SHEET-O | Annealed sheet / foil | Supply form |
ACT | Activated / in-service restructured gauze | Surface finish |
GAUZE-KNIT | Knitted gauze | Surface finish |
GAUZE-WOVENDefault | Woven gauze | Surface finish |
What is Pt95Rh5 gauze?
Pt95Rh5 gauze is platinum alloyed with 5 % rhodium, drawn to fine wire and woven or knitted into catalyst gauze, often packed together with palladium gauze. It is the industrial catalyst for ammonia oxidation in nitric acid production and for HCN synthesis by the Andrussow process, supplied as woven or knitted gauze, sheet and wire in annealed through H04 tempers. Mechanical values are 420 MPa tensile, 220 MPa yield and 20 % elongation, with a rated maximum service temperature of 950 °C. It is effectively not a machined material (machinability 20), cost tracks the platinum-group metal market, and spent gauze is returned for refining. Pt95Rh5 gauze has a density of 20.65 g/cm³ (0.746 lb/in³), heavier than 95% of precious metal grades. It melts at 1,785°C (3,245 °F). Pt95Rh5 gauze has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 67% of precious metal grades. Elongation at break is 20% and the elastic modulus is 180 GPa (26.1 Msi).
What is Pt95Rh5 gauze used for?
- Ammonia oxidation catalysis
- Nitric acid production
- HCN (Andrussow process) catalysis
Advantages
- High service temperature — 950°C (1,742 °F), better than 93% of precious metal grades
- Good corrosion resistance — 99/100, better than 93% of precious metal grades
- Readily welded — 85/100, better than 93% of precious metal grades
- Stiff — 180 GPa (26.1 Msi), better than 92% of precious metal grades
Limitations
- Heavy — 20.65 g/cm³ (0.746 lb/in³), worse than 95% of precious metal grades
- High embodied carbon — 14,000 kg CO₂/kg, worse than 88% of precious metal grades
- Difficult to machine — 30/100, worse than 86% of precious metal grades
- Poor heat conductor — 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 85% of precious metal grades
- Low electrical conductivity — 9.8 % IACS, worse than 80% of precious metal grades
Pt95Rh5 gauze properties
Typical room-temperature values; bars are the position among precious metal grades.
Physical3
Pt95Rh5 gauze has a density of 20.65 g/cm³ (0.746 lb/in³), heavier than 95% of precious metal grades. It melts at 1,785°C (3,245 °F).
Mechanical11
Pt95Rh5 gauze has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 67% of precious metal grades. Elongation at break is 20% and the elastic modulus is 180 GPa (26.1 Msi).
Thermal6
Pt95Rh5 gauze is rated for continuous service to 950°C (1,742 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 85% of precious metal grades. Thermal expansion is 9 µm/m·K (5 µin/in·°F).
Electrical3
Pt95Rh5 gauze conducts electricity at 9.8 % IACS, worse than 80% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is excellent (99/100), better than 93% of precious metal grades.
Sustainability4
Producing a kilogram of Pt95Rh5 gauze takes about 250,000 MJ of energy and emits 14,000 kg of CO₂ — more than 95% of precious metal grades. Typical recycled content is 60%.
Manufacturability8
Pt95Rh5 gauze's machinability is poor (30/100, worse than 86% of precious metal grades); weldability excellent (85/100); formability excellent (90/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the precious metal family
Yield strength against density for every precious metal grade FabDigit runs. Pt95Rh5 gauze is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Pt95Rh5 gauze
Is Pt95Rh5 gauze easy to machine?
Rarely machined; if required use sharp, high-rake carbide or diamond tools, light cuts and flood coolant to avoid smearing, and capture every chip and swarf for refining.
Can Pt95Rh5 gauze be welded?
Excellent — resistance spot, micro-TIG and laser welding are standard for edging gauze packs and joining wires; weld clean, oxide-free and away from base-metal contamination.
Can Pt95Rh5 gauze be formed, bent or molded?
Drawn to <0.06 mm wire and woven/knitted on precision looms; interanneal at 900–1100 °C in clean air or hydrogen-free atmosphere and avoid contact with graphite, Si, P or Pb-bearing tooling.
Pt95Rh5 gauze 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 |
|---|---|---|
| Rhsolid-solution strengthener; raises melting point and creep strength | 4.5 – 5.5 | 5 |
| Other (total impurities)Fe, Pd, Ir, Ag, Cu, Si each typically <100 ppm; Pb, Bi, As, P strictly limited | ≤ 0.05 | 0.02 |
| Pttypically 99.95 % refined platinum base | ≥ 94.4 (balance) |
What surface finishes work on Pt95Rh5 gauze?
Used bare; degrease and acid-clean (HCl or hot dilute HNO₃) before installation, then thermally condition in the burner — no plating, painting or anodising is applicable.
Equivalent designations
Standards and trade names that resolve to Precious Metal Pt95Rh5 gauze in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Pt-Rh gauze catalyst
How much does Pt95Rh5 gauze cost?
Pt95Rh5 gauze is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Pt95Rh5 gauze — frequently asked
What is Pt95Rh5 gauze used for?
Pt95Rh5 gauze is typically used for ammonia oxidation catalysis, nitric acid production and HCN (Andrussow process) catalysis. In short: standard ammonia oxidation catalyst; 950 °C service limit; woven from ultrafine wire.
What is the yield strength of Pt95Rh5 gauze?
Pt95Rh5 gauze has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 67% of precious metal grades. Strength varies by condition: see the 3 listed tempers.
Is Pt95Rh5 gauze easy to machine?
Not especially — machinability is rated poor (30/100, worse than 86% of precious metal grades). Rarely machined; if required use sharp, high-rake carbide or diamond tools, light cuts and flood coolant to avoid smearing, and capture every chip and swarf for refining.
Can Pt95Rh5 gauze be welded?
Yes — weldability is rated excellent (85/100). Excellent — resistance spot, micro-TIG and laser welding are standard for edging gauze packs and joining wires; weld clean, oxide-free and away from base-metal contamination.
What surface finishes work on Pt95Rh5 gauze?
Used bare; degrease and acid-clean (HCl or hot dilute HNO₃) before installation, then thermally condition in the burner — no plating, painting or anodising is applicable.
Can Pt95Rh5 gauze be formed, bent or molded?
Drawn to <0.06 mm wire and woven/knitted on precision looms; interanneal at 900–1100 °C in clean air or hydrogen-free atmosphere and avoid contact with graphite, Si, P or Pb-bearing tooling.
What is the maximum service temperature of Pt95Rh5 gauze?
Pt95Rh5 gauze is rated for continuous use to about 950°C (1,742 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Pt95Rh5 gauze cost?
Pt95Rh5 gauze is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Platinum-rhodium catalyst gauzes for nitric acid and HCN plants — Johnson Matthey (2023)
- Platinum and platinum alloys — physical and mechanical property data — Heraeus Precious Metals (2022)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Precious Metals) — ASM International (1990)
- ASM Handbook Vol. 3 — Alloy Phase Diagrams (Pt-Rh system) — ASM International (1992)
- Platinum Metals Review / Johnson Matthey Technology Review — ammonia oxidation catalyst gauze articles — Johnson Matthey (2018)
- ASTM B561 Standard Specification for Refined Platinum — ASTM International (2021)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.