UNS S31803

DUPLEX UNS S31803

General

A high molybdenum super-austenitic steel, UNS S31803 has outstanding resistance to chloride pitting, crevice corrosion and stress corrosion cracking. Suitable for use in pulp mill bleach plants, seawater heat exchangers and chemical process equipment

Chemical Composition

Ni

Mo

Si

Cr

C

Mn

N

S

P

Fe

 

Min %

4.50

3.00

22.00

0.14

Bal

 

Max %

6.5

3.50

1.00

23.00

0.03

2.00

2.00

0.02

0.03

 

Other Elements

PREn 33-34 typical

 

Mechanical Properties

MPA

%

Tensile Strength.

620 min.

 

Yield Strength (0.2% offset)

450 min.

 

Elongation in 2” (50mm) or 4D

 

25

Reduction of Area, min

 

 

 

 

Hardness

270 HB max

 

 

Alternative Designations

UNS S31803, UNS S32205, Werkstoff 1.4462, EN 1.4462, ASTM: A 240, A 276, A 479, A 789, A 790, A 182 (Grade F51), A 923, ASME: SA-240, SA-479, SA-789, SA-790, SA-182 (Grade 51), ASME Pgroup 10H.

X2CrNiMoN22.5.3, Z2CND22.05Az, F51 (329LN) / F60, SAF 2205 – SANMAC, URANUS 45N, FALC223, SS2377, 318S13, 332C15, 1.4470, Ralloy 2377. NORSOK MDS D41 to D45, D47 & D48.

It is listed in NACE MR-01-75 for oil and gas service.

The data contained in this publication is for informational purposes only and may be revised at any time without prior notice. The data is believed to be accurate and reliable, but Hague Fasteners Limited makes no representation or warranty of any kind (express or implied) and assumes no liability with respect to the accuracy or completeness of the information contained herein. Although the data is believed to be representative of the product, the actual characteristics or performance of the product may vary from what is shown in this publication. Nothing contained in this publication should be construed as guaranteeing the product for a particular use or application.