UNS S32900

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Chemical Composition

The following table shows the chemical composition of grade 329 stainless steel.

Element	Content (%)
Iron, Fe	63
Chromium, Cr	28
Nickel, Ni	4.5
Manganese, Mn	2
Molybdenum, Mo	1.5
Silicon, Si	1
Carbon, C	0.10
Phosphorous, P	0.040
Sulfur, S	0.030

Physical Properties

The physical properties of grade 329H stainless steel are given in the following table.

Properties	Metric	Imperial
Density	7.80 g/cm3	0.282 lb/in³

Mechanical Properties

The mechanical properties of annealed grade 329H stainless steel are displayed in the following table.

Properties	Metric	Imperial
Tensile strength, ultimate	725 MPa	105000 psi
Tensile strength, yield (@0.2%)	550 MPa	79800 psi
Charpy impact	54 J	39.8 ft-lb
Elastic modulus	190 – 210 GPa	27557 – 30458 ksi
Poisson’s ratio	0.27 – 0.30	0.27 – 0.30
Elongation at break (in 50 mm)	25%	25%
Hardness, Brinell	230	230
Hardness, Knoop (converted from Brinell hardness)	253	253
Hardness, Rockwell B	96	96
Hardness, Rockwell C (converted from Brinell hardness)	20	20
Hardness, Vickers (converted from Brinell hardness)	242	242