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 max

1.0 max

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

remainder

Copper

0.5 max

0.1 max

...

0.50 max

0.15 max

0.50 max

0.30 max

Nickel

remainder

remainder

remainder

remainder

remainder

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

remainder

Copper

...

0.50 max

1.5–3.0

...

Zirconium

...

0.050 max

...

...

Vanadium

...

0.10 max†

...

...

Nickel

remainder

70.0 min

42.0–46.0

55.0–59.0