| |
| Basic
Properties - Mechanical Properties |
| 0.2% Proof
Stress (N/mm2 )[ksi] minimum |
550 [79.8] |
| Ultimate Tensile Strength
(N/mm2) [ksi] minimum |
760 [110.3] |
| Elongation (%) minimum |
25 |
| Hardness (HBN) |
270max |
| Charpy V-notch Impact at ambient Temp (J) [ft.lb] |
80min [59min] |
| Charpy V-notch Impact at
-46°C
(J) [ft.lb] |
45av, 35min [33av, 25.8min] |
| ASTM G48A Corrosion
test at 50°C |
No pitting and weight loss <4.0g/m2 |
| Ultrasonic Testing |
According to ASTM A388 |
| Ferrite Content |
35%-55% |
| Microstructure |
Microstructure certified free from grain boundary
carbides, sigma, chi and laves phases |
| |
|
 |
Excellent corrosion resistance in a wide variety
of corrosive chemicals including sulphuric, phosphoric and
nitric acids |
| |
|
|
Outstanding resistance to pitting and crevice corrosion
in seawater and other chloride containing environments, with
Critical Pitting Temperature exceeding 50°C |
| |
|
|
High strength compared to austenitic and 22%Cr duplex
stainless steels |
| |
|
|
Excellent ductility and impact strength at both
ambient and sub-zero temperatures |
| |
|
|
High resistance to abrasion, erosion and cavitation
erosion |
| |
|
|
Excellent resistance to stress corrosion cracking
in chloride containing environments |
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|
|
Listed in NACE MR 01 75 for sour service |
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|
|
Tested to the highest degree using tests designed
to guarantee that the trade-marked product possesses high integrity,
a correct phase balance and the absence of sigma and other
deleterious phases. |
| |
|
|
Particularly applicable for large forgings, as the
formation of sigma phase is much less likely than it is for
other superduplexes. |
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|
|
ASME Approval for Pressure Vessel application |
| |
|
|
High Strength, with minimum 0.2% Proof Stress of 550N/mm2 |
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|
|
Excellent corrosion resistance in a wide variety of corrosive
chemicals including seawater and industrial acids |
| |
|
|
Applicable for sour service operation |
| Elements |
C |
Cr |
Cu |
Fe |
Mo |
Mn |
N |
Ni |
P |
S |
Si |
| Minimum |
|
24.0 |
1.50 |
REMAINDER |
2.90 |
|
0.10 |
4.50 |
|
|
|
| Maximum |
0.040 |
27.00 |
2.50 |
|
3.90 |
1.50 |
0.25 |
6.50 |
0.040 |
0.030 |
1.00 |
| Density (Kg.m-1) |
78.1 |
| Magnetic Permeability |
33 |
| Young’s Modulus (N/mm2) |
199 x 103 |
| Specific Heat, 20°C (J.Kg-1.°K-1) |
475 |
| Fracture Toughness, KQ (MPa.m½) |
98 |
| Specific Electrical Resistance, 20°C (µΩ.m) |
0.80 |
| Thermal conductivity, 20°C (W.m-1.°K-1) |
14.2 |
| Mean coefficient of thermal expansion,
20-100°C (°K-1) |
11.1 x 10-6 |
| |
|
|
FERRALIUM to MSA-MPS-51VS-SD40-BAR |
| |
|
|
NORSOK MDS D51 to D55 and D57 |
| |
|
|
EN 10088-1 1.4507 |
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|
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ASTM A182 UNS S32550 Forged Flanges Grade F61 |
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|
|
ASTM A473 UNS S32550 Forgings |
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|
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ASTM A240 UNS S32550 Sheet and Plate |
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|
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ASTM A479 UNS S32550 Bar |
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|
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ASTM A276 UNS S32550 Condition A |
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|
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ASTM A790 UNS S32550 Seamless and Welded Pipe |
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|
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ASTM A815 UNS S32550 Pipe Fittings |
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|
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A789 UNS S32550 Seamless & Welded Tubing |
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|
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ASME Approval as Table UHA 23 and Code Case 1883 |
| |
|
|
NACE MR 01-75 |
| |
| Chemical Process Industry: |
| Sulphuric Acid Production, Nitric Acid Processes, Polypropylene
Production, PVC ProductionTitanium Dioxide Production, Caustic
Evaporators, Equipment Handling Organic and Fatty Acids |
| |
 |
| |
| Marine Industry and Shipbuilding: |
| Propellers and Shafts, Rudders, Shaft Seals, Pumps, Bolts
and Fasteners, Valves, Instrumentation, Oil and Chemical Tankers |
| |
|
| |
| Oil and Gas Industry: |
| Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea
Equipment |
| |
|
| |
| Pollution Control: |
| Fans and pumps, Wet Scrubbers, Incinerators |
| |
|
| |
| Copper Smelting: |
| ID Fans, Tuyere bars, Wet Scrubbers, Leaching Area Precipitators |
| |
|
| |
| Pulp and Paper Industry: |
| Black liquor heater tubes, Digester Blow Valves, Rotary Feed
Valves, I.D.Fans, Brownstock Washers, Precipitators, Bleaching
Components |
| |
|
| |
| Food Industry: |
| Sugar Cane Centrifuges, Corn and Vegetable processing plant |
| |
|
| |
| Agrochemicals: |
| Fertilizer Production (Wet phosphoric acid) |
| |
|
| |
| Civil Engineering: |
| Statue of Liberty supporting structure, Swimming Pools, Sewage
Treatment |
| |
| Operation |
Cutting Speed m/min
(ft/min) |
Feed Rate
mm/rev
(in/rev) |
Depth of cut mm
(in) |
| Milling |
40 (130) |
0.05-0.13 mm/tooth
0.02-0.005 in/tooth |
0.5-6.0
(0.02-0.25) |
| Drilling – 6.4mm (1/4”) dia |
250rpm |
0.075 (0.003) |
|
| Drilling – 12.7mm (1/2”) dia |
250rpm |
0.125 (0.005) |
|
| Drilling – 25.4mm (1”) dia |
150rpm |
0.28 (0.011) |
|
| Turning - Roughing |
30-45 (100-150) |
0.20 – 0.38 (0.008-0.015) |
3 (0.125) |
| Turning - Finishing |
50-60 (165-200) |
0.13 – 0.20 (0.005-0.008) |
0.5 (0.02) |
| Tooling |
Milling/Turning: Carbide
(SANDVIK GC 235, SECO T25M) Drilling: HSS, point angle 118°,
chisel angle 120° |
| Alloy Comparisons |
S17400
(17- 4PH) |
S31803 |
718
(ST) |
S31254 |
FERRALIUM
255-SD40 |
| 0.2% Proof Strength (N/mm2), minimum |
1070 |
450 |
550
max |
300 |
550 |
| Corrosion Rate
(mm.y-1) Seawater |
~1 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
Corrosion Rate (mm.y-1)
10% sulphuric acid at 80°C |
10 |
0.4 |
<0.15 |
1.5 |
<0.15 |
Corrosion Rate (mm.y-1)
Boiling 50% nitric acid |
<0.15 |
<0.15 |
<0.15 |
0.4 |
<0.15 |
| Wear Properties related to Hardness (HBN) |
RC38 |
RC25 |
RC20 |
RC20 |
RC28 |
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| Back
to Top |
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Disclaimer
Data in this publication is provided solely for the purposes of distribution
of information. Langley Alloys cannot make guarantees with respect to subject
matter or accuracy of this information. Langley Alloys specifically disclaims
all guarantees, expressed, implied or otherwise, including without limitation,
all warranties of merchantability and fitness for a particular purpose. This
publication may include technical inaccuracies or typographical errors. If
errors are found, please make a notification via e-mail to: info@langleyalloys.com |
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