Nickel Alloys · Pipes · ASTM B407 / B514
Incoloy 800H Pipes
In short: Incoloy 800H pipe to ASTM B407 / B514 is the reformer-outlet and hot-gas pipe of choice: controlled carbon (0.05–0.10%) and coarse grain give creep strength above about 600 °C.
- N08810
- UNS number
- 7.94
- density, g/cm³
- 3.1 / 3.2
- EN 10204 certificates
- 3
- Incoloy 800H product forms
Why this combination
Why reformer outlet systems use 800H pipe
Reformer pigtails and outlet headers carry hot synthesis gas under pressure for years; 800H's creep strength and resistance to oxidation and carburisation make it the standard choice.
Confirm grain size and carbon on the certificate; dual 800H/800HT material is common.
Specification
How to specify Incoloy 800H pipes
NPS ⅛" to 48" and larger (DN 6 – DN 1200+), schedules 5S to XXS, single random, double random and cut lengths
- Specification
- ASTM B407 / B514
- UNS
- N08810
- EN / W.Nr.
- 1.4958
- Designation
- UNS N08810
- Requirements
- C 0.05–0.10%; grain size ASTM 5 or coarser
Sizes and weights
Incoloy 800H pipes sizes, weighed at 7.94 g/cm³
Other sizes on request. For general pipes information, such as manufacturing routes and end finishes, see the pipes guide.
| NPS | OD mm | Sch 5S | Sch 10S | Sch 40S | Sch 80S |
|---|---|---|---|---|---|
| ½" | 21.34 | 1.65 / 0.81 | 2.11 / 1.01 | 2.77 / 1.28 | 3.73 / 1.64 |
| ¾" | 26.67 | 1.65 / 1.03 | 2.11 / 1.29 | 2.87 / 1.70 | 3.91 / 2.22 |
| 1" | 33.40 | 1.65 / 1.31 | 2.77 / 2.12 | 3.38 / 2.53 | 4.55 / 3.27 |
| 1¼" | 42.16 | 1.65 / 1.67 | 2.77 / 2.72 | 3.56 / 3.43 | 4.85 / 4.51 |
| 1½" | 48.26 | 1.65 / 1.92 | 2.77 / 3.14 | 3.68 / 4.09 | 5.08 / 5.47 |
| 2" | 60.33 | 1.65 / 2.42 | 2.77 / 3.98 | 3.91 / 5.50 | 5.54 / 7.57 |
| 2½" | 73.03 | 2.11 / 3.73 | 3.05 / 5.32 | 5.16 / 8.74 | 7.01 / 11.54 |
| 3" | 88.90 | 2.11 / 4.57 | 3.05 / 6.53 | 5.49 / 11.42 | 7.62 / 15.45 |
| 4" | 114.30 | 2.11 / 5.90 | 3.05 / 8.46 | 6.02 / 16.26 | 8.56 / 22.58 |
| 6" | 168.28 | 2.77 / 11.44 | 3.40 / 13.98 | 7.11 / 28.58 | 10.97 / 43.05 |
| 8" | 219.08 | 2.77 / 14.95 | 3.76 / 20.19 | 8.18 / 43.03 | 12.70 / 65.38 |
| 10" | 273.05 | 3.40 / 22.87 | 4.19 / 28.10 | 9.27 / 60.99 | 12.70 / 82.48 |
| 12" | 323.85 | 3.96 / 31.60 | 4.57 / 36.40 | 9.53 / 74.72 | 12.70 / 98.57 |
Chemistry
Incoloy 800H composition
- UNS
- N08810
- EN / W.Nr.
- 1.4958 · X5NiCrAlTi31-20
- Density
- 7.94 g/cm³
| Element | Limit, % | Why it matters |
|---|---|---|
| Ni | 30.0 – 35.0 | |
| Cr | 19.0 – 23.0 | |
| Fe | 39.5 min | |
| C | 0.05 – 0.10 | |
| Al | 0.15 – 0.60 | |
| Ti | 0.15 – 0.60 | |
| Mn | 1.50 max | |
| Si | 1.00 max | |
| Cu | 0.75 max |
Limits per ASTM B409; other product forms and specifications differ slightly. Your order's specification and edition govern.
Questions
About Incoloy 800H pipes
Is 800H pipe used for reformer pigtails?
Yes, it is a classic pigtail and outlet-header material.
800H or 800HT pipe?
800HT has tighter limits for the highest allowables; dual certification is common.
From enquiry to dispatch
How a Incoloy 800H pipes order runs
- 01 EnquiryGrade, specification, size, quantity
- 02 ReviewChecked against your standard
- 03 InspectPMI, dimensions, TPI if required
- 04 CertifyEN 10204 3.1 / 3.2, heat traceable
- 05 ShipPacked and documented for the destination
Need Incoloy 800H pipes?
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