MATERIAL DESCRIPTION

Super Duplex UNS S32750 is the most common super duplex grade in the market. UNS S32750 is a duplex stainless steel especially designed for service in aggressive chloride-containing environments. It has very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. It is widely used in oil & gas, hydropower, pressure vessels, pulp & paper, structural components and chemical tankers.

CHEMICAL COMPOSITION

WEIGHT% C SI MN S P CR NI MO  CU  N
MIN.  24,0  6,00  3,00  0,24
MAX.  0,03  0,80  1,20  0,020 0,035  26,0  8,00  5,00  0,50  0,32

NORSOK: PREN = (Cr% + 3.3Mo% + 16N%) ≥ 40
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 D51/ D53/ D54/ D55/ D57/ D58

APPLICATIONS

The main applications are for details with special requirements for high corrosion resistance.
UNS S32750 is 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.

Mechanical Properties

YIELD STRENGTH
RP0.2
MPA
TENSILE STRENGTH
RM
MPA
ELONGATION
[%]
HARDNESS
[HB]
IMPACT
CHARPY-V, -46ºC
[J]
PRE
BAR  ≥ 550  ≥ 750  ≥ 25  ≥ 270  ≥ 45  ≥ 40
PLATE CR  ≥ 550  750 – 1000  ≥ 25  ≥ 45  ≥ 40
PLATE HR  ≥ 550  750 – 930  ≥ 25  ≥ 45  ≥ 40

Heat Treatment

Solution annealing at 1100°C followed by water quenching.

Weldability

Very good.

ALLOY 1.4410 / UNS S32750 ROUND BAR

 DESCRIPTION  KG/M
 16 MM  1.7
 20 MM  2.5
 25 MM  3.9
 30 MM  5.7
 35 MM  7.7
 40 MM  10.1
 45 MM  12.8
 50 MM  15.8
 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  96
 DESCRIPTION  KG/M
 130 MM  106
 140 MM  123
 150 MM  141
 160 MM  161
 170 MM  182
 180 MM  204
 200 MM  251
 225 MM  319
 250 MM  385
 280 MM  494
 300 MM  566
 330 MM  686
 350 MM  780
 380 MM  910
 406,4 MM  1040

ALLOY 1.4410 / UNS S32750 PLATES

 DESCRIPTION  KG/PLATE
 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
 12 X 1500 X 3000 MM  445
 DESCRIPTION  KG/PLATE
 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  2966
35 X 2000 X 4000 MM  2240
 40 X 1500 X 3000 MM  1484
 40 X 2000 X 6000 MM  3956
 45 X 2000 X 4000 MM  2880
 50 X 1500 X 3000 MM  1854
 50 X 2000 X 4000 MM  3296