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SOLUTIONS: Stainless Steel Ferritic Stainless Steel These are the grades AISI 400 series that contain from about 14 to 27% chromium and no nickel. They are non-hardening by heat treatment.

AISI Type

2.06

They are magnetic in all conditions. Principal applications are products requiring resistance to corrosion and scaling at evlevated temperatures rather than high strength.

Composition % *

Carbon Chromium C Cr

Manganese Ni

Other

405 0.08 11.5 – 14.5 1.0 409 0.08 10.5 – 11.75

1.0 Max

429 0.12 14.0 – 16.0 1.0

430 0.12 14.0 – 18.0 1.0 439 F 0.12 14.0 – 18.0 1.25 430Fse 0.12 14.0 – 18.0 1.25

0.1 – 0.3 AI

1.0 Si Max, Ti min. 6 x C, 0.045 S, 0.045 P

1.0 Si

434 436 439

0.12 0.12 0.07

16.0 – 18.0 16.0 – 18.0 17.75 – 18.75

1.0 1.0

1.0

0.75 – 1.25 Mo, 1.0 Si 0.75 – 1.25 Mo, (Cb+Ta) Min 5 x % C, 1,0 Si 0,6 Si – 0,5 Ni, 0,15 AI, Ti 12 x C (1.0 max)

442 444 446

0.20 0.025 0.20

18.0 – 23.0 17.5 – 19.5 23.0 – 27.0

1.0 1.0

1.5

1,0 Ni, 1,75 – 2,5 Mo, 0,035 N max (Cb+Ta) min 0,2 + 4 (%C+%N) 0,25 N 0,75 Ni, 0,75 – 15 Mo 0,2 – 10 Ti

26-1 0.06 25.0 – 27.00 0.75

29-4 0.01 28.0 – 30.0 0.3

29-4-2 0.01 28 – 30.0 0.3

– 0.060 P, 0.15 S (min), 0.60 Mo (opt) 0.60 P, 0.060 S, 0.15 Se (min)

May be welded with: (E) Electrode (W) Wire Welding

23/14-322N (E)

S-309-M-GF-222 (W)

0,04 Ni, 0,2 Cu 0,025, 0,75 Si 0,015 Ni, 3,5 – 4,2 Mo 0,15 Cu 0,02 Ni, 0,2 Si, 0,025 P, 0,02 S 2,0 – 2,5Ni, 3,5 – 4.2 Mo, 0,15 Cu 0,02Ni, 0,2 Si, 0,025P, o,025 S

* Single values denote maximum percentage unless otherwise noted. Unless otherwise noted, other elements of all alloys listed include maximum contents of 2.0 % Mn, 1.0 % Si, 0,045 % P and 0,030 % S. Balance is Fe

Ferritic stainless steel has the following characteristics: • Magnetic.

• Cannot be hardened by heat treatment. • Poor weldability.

• Grade: 409 (high temperature), 430 (most used). • Unified numbering system UNS: S 40900, S 43000.

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