Inconel 625 EN 10095 - Standard Specification for Non Ferrous Bolts, Hex Cap Screws and Stud Bolts for General Application.
This Standard Specification covers the grades of
wrought steels and nickel alloys listed in Tables below
which are usually employed for products, for which
the main requirement is their resistance to the effects
of hot gases and products of combustion at
temperatures above 550 8C.
EN 10095 specifies the technical delivery conditions for semi-finished products, for hot or cold
rolled sheet/plate and strip, hot or cold formed bars, rods and sections of heat resisting steels and
nickel alloys including Inconel Alloy 625.
Materials covered in this European Standard are
classified according to their structure into:
- ferritic steels.
- austenitic-ferritic steels.
- austenitic steels.
- austenitic nickel alloys.
Chemical composition (cast analysis) 1) of austenitic nickel alloys
| Alloys designation | % by mass | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | C | Mn max |
Si max |
P max. |
S max. |
Ni | Cr | Co | Fe | Mo | A1 | Ti | Cu max. |
Nb + Ta | B max. |
Ce |
| NiCr22Mo9Nb | 2.4856 | 0.03 to 0.10 | 0.50 | 0.50 | 0.020 | 0.015 | min. 58.00 | 20.00 to 23.00 | max. 1.00 | max. 5.00 | 8.00 to 10.00 | max. 0.40 | max. 0.40 | 0.50 | 3.15 to 4.15 | ||
Mechanical Properties
| Designation | Products | Heat treatment conditions |
HB max. 1) 2) 3) |
Proof strength | Tensile strength | A % min. | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | Form | Thickness 𝘢 or diameter 𝘥 mm |
Rp0.2 N/mm2 |
Rp1.0 N/mm2 |
Rm N/mm2 |
Long products | Flat products | ||||
| min 3) | min 3) | 1) | 3) | 0.5 ≤ a ≤ 3 1, tr |
3 < a | |||||||
| 1 | tr | |||||||||||
| Heat resisting nickel alloys | ||||||||||||
| NiCr22Mo9Nb | 2.4856 | flat products | 3 ≤ a < 75 | +AT | 240 | 380 | -- | 760 to 100 | -- | -- | 30 | 30 |
| a < 3 | 415 | -- | 820 to 1050 | -- | 30 | -- | -- | |||||
| bars | 100 < d ≤ 250 | 345 | - | 760 to 1000 | 25 | -- | -- | -- | ||||
| d ≤ 100 | 415 | -- | 820 to 1050 | 30 | -- | -- | -- | |||||
| rods | d ≤ 25 | 415 | - | 820 to 1050 | 30 | -- | -- | -- | ||||
|
1) The maximum HB values may be raised by 100 units or the maximum tensile strength value may be raised by 200 N/mm2 and the minimum elongation value be lowered to 20 % for sections and bars of ≤ 35 mm thickness having a final cold deformation. 2) For guidance only. 3) For rods, only the tensile strength values apply. |
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Heat Treatments
| Designation | Heat Treatments | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | Symbol1) | Temperatures2) °C |
Type of cooling3) | ||||||||
| Heat resisting nickel alloys | ||||||||||||
| NiCr22Mo9Nb | 2.4856 | +A | 950 to 1 000 | W, a5) | ||||||||
|
1) A = annealed; AT = solution annealed. 2) If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred or even exceeded. 3) a = air; w = water. 4) In special cases furnace cooling is also permitted. 5) Cooling sufficiently rapid. 6) Heat treatment is not required in each case since the material will be exposed to high temperature when in operation. |
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Maximum Application Temperature Ta For Air
| Designation | Tamax. °C |
|
|---|---|---|
| Name | Number | |
| Heat resisting nickel alloys | ||
| NiCr22Mo9Nb | 2.4856 | 1 000 |
|
1) See Creep Properties For 1% Elongation Table. 2) The loss of metal caused by scaling does not exceed 1 g/m2.h at Ta, and does not exceed 2 g/m2 at Ta + 50 °C on average for a period of 120 h with four intermediate coolings. |
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