Inconel 600 Spectacle BlindASTM B564 · ASME B16.48 · Manufacturer, stockist & exporter, India
Alloy 600 · UNS N06600 · SB
An Inconel 600 spectacle blind is a figure-8 plate with one solid end and one open ring, fitted between two flanges, made from Inconel 600 to ASTM B564. A spectacle blind lets operators positively isolate a line: rotate the solid end into the line to block flow, or the ring end to allow it. Larger sizes use separate spacers and paddle blanks.
- ASTM B564
- ASME B16.48
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an Inconel 600 Spectacle Blind?
- What it is
- A figure-8 plate with one solid end and one open ring, fitted between two flanges
- Material
- ASTM B564
- Dimensions
- ASME B16.48
- Grade
- Inconel 600 · UNS N06600
- Best at
- High-temperature oxidation, caustic and nuclear service
Inconel 600 Spectacle Blind Specification
| Product | Inconel 600 Spectacle Blind |
|---|---|
| Material standard | ASTM B564 |
| Dimensional standard | ASME B16.48 |
| Sizes | ½" – 24" (ASME B16.5) · 26" – 60" (ASME B16.47) |
| Pressure class | Class 150, 300, 400, 600, 900, 1500, 2500 · PN 6 – PN 100 |
| Facing | RF · FF · RTJ · tongue & groove |
| Bore | To match pipe schedule (state on order) |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Spectacle Blind
A spectacle blind lets operators positively isolate a line: rotate the solid end into the line to block flow, or the ring end to allow it. Larger sizes use separate spacers and paddle blanks.
- Thickness set by class and size
- Paddle blank and spacer versions for large bores
- Handle or lifting lug to order
More on choosing: Spectacle blind guide.
Inconel 600 Spectacle Blind: Why 600 for spectacle blinds
A spectacle blind lets operators positively isolate a line: rotate the solid end into the line to block flow, or the ring end to allow it. Larger sizes use separate spacers and paddle blanks. In Inconel 600, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy flanges are used where acids, chlorides or heat defeat stainless. Inconel 600 is picked for high-temperature oxidation, caustic and nuclear service. |
|---|---|
| Typical service | Furnaces & heat treating — Muffles, retorts and radiant tubes. |
| B16.5 material group | 3.5 |
| Bolting | B7 (coated), B8M or nickel-alloy studs such as Inconel 600 from ASTM B166, as the project specifies |
| Welding to carbon steel | A nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel |
| Matching filler | ERNiCr-3 (AWS A5.14) |
Inconel 600 Spectacle Blind Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+Co) | 72.0 min |
| Chromium | 14.0 – 17.0 |
| Iron | 6.0 – 10.0 |
| Carbon | 0.15 max |
| Manganese | 1.0 max |
| Silicon | 0.5 max |
| Copper | 0.5 max |
| Sulphur | 0.015 max |
Inconel 600 Spectacle Blind Mechanical Properties
| Annealed plate | Value |
|---|---|
| Tensile strength | 550 MPa · 80 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
Full chemistry, properties and equivalents are on the Inconel 600 grade page.
Other Inconel 600 flanges
Inconel 600 Spectacle Blinds for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 600 Spectacle Blind — questions buyers ask
When should I use a spacer and paddle blank instead of a spectacle blind?
In large sizes a spectacle blind becomes too heavy and awkward, so ASME B16.48 provides separate paddle blanks and spacers.
What pressure rating does a Inconel 600 spectacle blind have?
It depends on class and temperature. Inconel 600 forgings are in ASME B16.5 material group 3.5; read your class column in that group's table at the design temperature.
Can Inconel 600 spectacle blinds be welded to carbon steel?
Yes — a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel.
Which standard covers Inconel 600 spectacle blinds?
The material is ASTM B564; dimensions follow ASME B16.48. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Inconel 600 spectacle blind?
The alloy price, the size and pressure class, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026