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Duplex Steel Buttweld Pipe S31803 F51 5D Bend

Basic Info

Model No.:  1/2" To 120" (DN15-3000)

Product Description

He Bei GuangHao Pipe Fittings Co .,LTD Specializing in the production of steel pipe and pipe fittings
Main production:Buttweld Steel Pipe Fittings,Industrial Flanges,Steel Pipes,Buttweld Elbows,Buttwel Tees,Forged fittings,etc.
Welcome to discuss

Forged Fittings/Buttweld Steel Pipe Fittings Type: Elbow, cross, street elbow, tee, coupling, half coupling, cap, plug, bushing, union, outlet, sage nipple, bull plug, reducer insert, pipe nipple etc.

The following are the properties of 31803:
 Stainless ferritic-austenitic Cr-Ni-Mo steel with nitrogen addition.
 High corrosion resistance, especially against stress corrosion cracking in solutions containing chloride.
 Good strength properties.
 Resistant to intergranular corrosion in the temperature range up to 300°C.
 Heat treatment subsequent to welding not necessary.
 Surface condition for optimum corrosion resistance: pickled, heat treated free from scale or machined.
Application
Components in the chemical industry, e.g. separator and Heat Exchanger parts, from the paper industry, oil and gas production, compressor parts, seawater desalination plants.
Technical Info


Chemical Composition (average %)
C Si Mn Cr Mo Ni N
0.025 0.60 1.30 22.60 3.20 5.80 0.17
Standards
EN / DIN ASTM UNS AFNOR
<1.4462 >
X2CrNiMoN22-5-3
A240 S31803 Z2CND22-5 Az
Hot Forming
Forging
1200 to 950°C / Air cooling
Heat Treatment
Solution annealing:
1020 to 1100°C
Water , air (thickness below 2mm)
Structure
Ferrite + Austenite
Mechanical Properties
Condition: solution annealed

Product

Dimension
Size
mm

0.2% proof stress
N/mm2
min.

Tensile strength
N/mm2

Elongation A5
% min.
L Q T

Impact strength
(ISO-V)
J min.
L Q T

St

≤ 160

450

650 – 880

25 – – – –

100 – – – –

Bl

≤ 75

460

640 – 840

252) 252) – –

90 60 – –

St = Bar ,
Bl = Sheet or plate
L = Longitudinal, Q = Transverse, T = Tangential
1) For sheet or plate < 3mm = A80mm specimen
The values for Other products and dimensions shall be established by agreement.
Hight Temperature Properties
Condition: solution annealed

0.2% yield strength
N/mm² min.

Temperature

100°C

150°C

200°C

250°C

360

335

315

300





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