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This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for high-temperature service. Chemical analysis shall be performed on the alloy and shall conform to the chemical composition requirement in carbon, manganese, silicon, phosphorus, sulfur, chromium, cobalt, molybdenum, columbium, tantalum, titanium, aluminum, zirconium, boron, iron, copper, and nickel. The material shall follow recommended annealing treatment, solution treatment, stabilizing treatment, and precipitation hardening treatment. Tension testing, hardness testing and stress-rupture testing shall be performed on the material and shall comply to the required tensile strength, yield strength, elongation, reduction in area, and Brinell hardness.
Область применения1.1 This specification2 covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for moderate or high temperature service (Table 1).
TABLE 1 Chemical Requirements
Element
Composition Limits, %
UNS N07022
UNS N07208
UNS N07252
(Formerly
Grade 689)
UNS N07001
(Formerly
Grade 685)
UNS N07500
(Formerly
Grade 684)
UNS N07750
(Formerly
Grade 688)
UNS N07718
(Formerly
Grade 718)
Carbon
0.010 max
0.04–0.08
0.10–0.20
0.03–0.10
0.15 max
0.08 max
0.08 max
Manganese
0.5 max
0.3 max
0.50 max
1.00 max
0.75 max
1.00 max
0.35 max
Silicon
0.08 max
0.15 max
0.50 max
0.75 max
0.75 max
0.50 max
0.35 max
Phosphorus
0.025 max
0.015 max
0.015 max
0.030 max
0.015 max
...
0.015 max
Sulfur
0.015 max
0.015 max
0.015 max
0.030 max
0.015 max
0.01 max
0.015 max
Chromium
20.0–21.4
18.5–20.5
18.00–20.00
18.00–21.00
15.00–20.00
14.00–17.00
17.0–21.0
Cobalt
1.0 max
9.0–11.0
9.00–11.00
12.00–15.00
13.00–20.00
1.00 maxA
1.0 maxA
Molybdenum
15.5–17.4
8.0–9.0
9.00–10.50
3.50–5.00
3.00–5.00
...
2.80–3.30
Columbium
(Nb) + tantalum
...
...
...
...
...
0.70–1.20
4.75–5.50
Titanium
...
1.90–2.30
2.25–2.75
2.75–3.25
2.50–3.25
2.25–2.75
0.65–1.15
Aluminum
0.5 max
1.38–1.65
0.75–1.25
1.20–1.60
2.50–3.25
0.40–1.00
0.20–0.80
Zirconium
...
0.020 max
...
0.02–0.12
...
...
...
Boron
0.006 max
0.003–0.010
0.003–0.01
0.003–0.01
0.003–0.01
...
0.006 max
Iron
1.8 max
1.5 max
5.00 max
2.00 max
4.00 max
5.00–9.00
remainderB
Copper
0.5 max
0.1 max
...
0.50 max
0.15 max
0.50 max
0.30 max
Nickel
remainderB
remainderB
remainderB
remainderB
remainderB
70.00 min
50.0–55.0
Tantalum
0.2 max
0.1 max
...
...
...
...
...
Columbium (Niobium)
...
0.2 max
...
...
...
...
...
Tungsten
0.8 max
0.5 max
...
...
...
...
...
UNS N07080
(Formerly
Grade 80A)
UNS N07752
UNS N09925
UNS N07725
Carbon
0.10 max
0.020–0.060
0.03 max
0.03 max
Manganese
1.00 max
1.00 max
1.0 max
0.35 max
Silicon
1.00 max
0.50 max
0.5 max
0.20 max
Phosphorus
...
0.008 max
0.03 max
0.015 max
Sulfur
0.015 max
0.003 max
0.03 max
0.010 max
Chromium
18.00–21.00
14.50–17.00
19.5–22.5†
19.00–22.50†
Cobalt
...
0.050 max
...
...
Molybdenum
...
...
2.5–3.5
7.00–9.50
Columbium
(Nb) + tantalum
...
0.70–1.20
0.5 max (Nb only)
2.75–4.00
Titanium
1.80–2.70
2.25–2.75
1.9–2.40
1.00–1.70
Aluminum
0.50–1.80
0.40–1.00
0.1–0.5
0.35 max
Boron
...
0.007 max
...
...
Iron
3.00 max
5.00–9.00
22.0 min
remainderB
Copper
...
0.50 max
1.5–3.0
...
Zirconium
...
0.050 max
...
...
Vanadium
...
0.10 max†
...
...
Nickel
remainderB
70.0 min
42.0–46.0
55.0–59.0
A If determined.B The element shall be determined arithmetically by difference.† Chromium content was corrected editorially.† Vanadium content was corrected editorially
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.