ASTM B564-2015 Nickel Alloy Forgings

Alloy Type: Ni-Cr-Mo-Nb

UNS Designation: N06625

Features

Alloy 625 has excellent strength at temperatures up to 816℃. At higher temperatures, it’s strength is general ally lower than that of other solid solution strengthened alloys Alloy 625 has good oxidation resistance at temperatures up to 980 C and shows good resistance to aqueous corrosion, but is relatively moderate compared to other more capable corrosion resistant alloys.

Applications

Chemical process industry and sea water application Alloy 625 is used in short term applications at temperatures up to 816C For long term service, it is best restricted to a maximum of 593C, because long term exposure above 593 C will result in significant embrittlement.

Ordering Information

It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this specification. Examples of such requirements include, but are not limited to, the following:

1 Alloy type.

2 Condition.

3 Quantity (mass or number of pieces).

4 Forging, sketch or drawing.

5 Certification-State if certification or a report of test results is required.

6 Samples for Product (Check) Analysis—Whether samples for product (check) analysis should be furnished.

7 Purchaser Inspection - If the purchaser wishes to witness tests or inspection of material at the place of manufacture, the purchase order must so state indicating which tests or inspections are to be witnessed.

Chemical Requirements: Composition, %

Ni: ≥58.0

Fe: ≤5.0

Mn: ≤0.50

C: ≤0.10

Si: ≤0.50

S: ≤0.015

P: ≤0.015

Cr: 20.0-23.0

Al: ≤0.4

Ti: ≤0.4

Nb: 3.15-4.15

Mo: 8.0-10.0

Mechanical Property Requirements

Condition: annealed