MATERIAL DESCRIPTION

Duplex UNS S31803/ S32205 are the most common duplex grades in the market. They have very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. They are widely used in oil & gas, hydro power, pressure vessels, pulp & paper, structural components and chemical tankers. The alloys are not intended to be used at temperatures above 300°C due to embrittlement.

Applications

The main applications are for details with special requirements for high corrosion resistance.

S31803/ S32205 are characterized by:

  • High resistance to stress corrosion cracking in halide containing environments.
  • High resistance to pitting and crevice corrosion.
  • High resistance to general corrosion.
  • High mechanical strength.
  • High resistance to erosion corrosion and corrosion fatigue.

Heat Treatment
Solution annealing at 1020 – 1100°C followed by water quenching

Weldability
Very good.

Chemical composition

Weight % C Si Mn S P Cr Ni Mo N
Min. 21,00 4,50 2,50 0,10
Max. 0,030 1,00 2,00 0,015 0,030 23,00 6,50 3,50 0,22

NORSOK: N: 0,14 – 0,20%
Product Standards: EN 10088-3, ASTM A276, ASTM A479, ASTM A182–11A
(Chemical composition and mechanical properties only)
Approvals: NACE MR0175, NORSOK M650, NORSOK M630 MDS D41/D43/ D44/ D45/ D47

Mechanical Properties

Yield strength Rp0.2,
MPa
Tensile strength Rm,
MPa
Elongation
[%]
Hardness
[HB]
Impact, Charpy-V, -46ºC
[J]
Pre
BAR ≥ 450 650 – 880 ≥ 25 ≤ 270 ≥ 45 ≥ 34
PLATE CR (COIL) ≥ 500 700 – 950 ≥ 25 ≥ 45 ≥ 34
PLATE HR (COIL) ≥ 480 700 – 950 ≥ 25 ≥ 45 ≥ 34
PLATE (QUARTO) ≥ 480 680 – 840 ≥ 25 ≥ 45 ≥ 34

Round Bar Stock

DIA KG/M
6 mm 0.3
8 mm 0.4
10 mm 0.6
12 mm 1.
16 mm 1.7
20 mm 2.6
25 mm 4.
30 mm 5.6
35 mm 7.7
40 mm 10.1
45 mm 12.7
50 mm 15.7
60 mm 22.6
70 mm 30.8
80 mm 40.2
90 mm 50.9
100 mm 62.9
110 mm 76.1
120 mm 90.5
125 mm 98.7
130 mm 106.
140 mm 123.
150 mm 141
160 mm 161
170 mm 182
DIA KG/M
180 mm 204
185 mm 215
190 mm 228
200 mm 251
202 mm 258
210 mm 278
220 mm 304
225 mm 319
230 mm 333
240 mm 362
250 mm 385
265 mm 438
275 mm 476
280 mm 493
300 mm 566
310 mm 612
320 mm 645
330 mm 686
350 mm 780
355,6 mm 805
365 mm 840
375 mm 880
380 mm 910
400 mm 995
410 mm 1058

HOLLOW BAR STOCK

OD MM ID MM WEIGHT KG/M
45 28 8,07
50 25 11,98
71 45 19,43
90 63 26,87
106 56 51,52
112 63 54,71
112 80 40,07
118 80 48,71
125 90 49,15
132 106 41,53
132 90 61,41
140 100 62,60
150 106 73,33
160 112 84,88
170 128 83,50
190 132 121,29
212 170 107,62
236 150 213,51
250 200 150,80

Plate Stock

MEASUREMENTS KG/PLATE
0,5 x 1500 x 3000 mm 18
1 x 1000 x 2000 mm 16
1 x 1500 x 3000 mm 36
1,5 x 1500 x 3000 mm 54
2 x 1000 x 2000 mm 32
2 x 1500 x 3000 mm 72
3 x 1500 x 3000 mm 108
3 x 1500 x 6000 mm 216
3 x 2000 x 6000 mm 288
4 x 1500 x 3000 mm 144
4 x 1500 x 6000 mm 288
4 x 2000 x 6000 mm 384
5 x 1500 x 3000 mm 180
5 x 1500 x 6000 mm 360
5 x 2000 x 6000 mm 480
6 x 1500 x 3000 mm 216
6 x 1500 x 6000 mm 432
6 x 2000 x 6000 mm 576
8 x 1500 x 3000 mm 297
8 x 1500 x 6000 mm 594
8 x 2000 x 6000 mm 791
10 x 1500 x 3000 mm 371
10 x 1500 x 6000 mm 742
10 x 2000 x 6000 mm 989
MEASUREMENTS KG/PLATE
12 x 1500 x 3000 mm 445
12 x 1500 x 6000 mm 890
12 x 2000 x 6000 mm 1187
15 x 1500 x 3000 mm 557
15 x 1500 x 6000 mm 1113
15 x 2000 x 6000 mm 1484
20 x 1500 x 3000 mm 742
20 x 1500 x 6000 mm 1484
20 x 2000 x 6000 mm 1978
25 x 1500 x 3000 mm 927
25 x 1500 x 6000 mm 1854
25 x 2000 x 6000 mm 2472
30 x 1500 x 3000 mm 1113
30 x 1500 x 6000 mm 2225
30 x 2000 x 6000 mm 2967
35 x 2000 x 6000 mm 3360
40 x 1500 x 3000 mm 1484
40 x 1500 x 6000 mm 2967
40 x 2000 x 6000 mm 3956
45 x 2000 x 4000 mm 2880
50 x 1500 x 3000 mm 1854
50 x 1500 x 6000 mm 3708
50 x 2000 x 6000 mm 4944
60 x 1500 x 3000 mm
80 x 1500 x 3000 mm

COIL STOCK

1300 MM 1500 MM 2000 MM
 0,4 mm  1,5 mm  3 mm
 0,5 mm  2 mm  4 mm
 1 mm  3 mm  5 mm
 4 mm  6 mm
 5 mm
 6 mm

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Equivalent Standards

  • EN 1.4462
  • UNS S31803
  • UNS S32205
  • F51 / F60
Tags: Coil / Plate / Round Bar & Bored Bar