| |
| Basic
Properties - Mechanical Properties |
| 0.2% Proof
Stress (N/mm2 ) [ksi] minimum |
720 [103.5] |
| Ultimate Tensile Strength
(N/mm2) [ksi] minimum |
860 [124.8] |
| Elongation (%) minimum |
16 |
| Hardness (HBN) |
220-335 |
| Charpy V-notch Impact at ambient Temp (J) [ft.lb] |
80min [59min] |
| Charpy V-notch Impact at -46°C (J) [ft.lb] |
40av, 35min [29.5av, 25.8min] |
| ASTM G48A Corrosion
test at 40°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 |
| |
|
 |
High Strength - the minimum 0.2% Proof Stress of
720 to match B7 carbon steel |
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|
|
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 40°C |
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|
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Excellent ductility and impact strength at both
ambient and sub-zero temperatures |
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|
|
High resistance to abrasion, erosion and cavitation
erosion |
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|
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Excellent resistance to stress corrosion cracking
in chloride containing environments |
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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. |
| |
|
|
High structural integrity, optimised phase balance and the
absence of sigma and other deleterious phases. |
| Elements |
C |
Cr |
Cu |
Fe |
Mo |
Mn |
N |
Ni |
P |
S |
Si |
| Minimum |
|
24.5 |
1.50 |
REMAINDER |
3.10 |
0.80 |
0.20 |
5.50 |
|
|
0.20 |
| Maximum |
0.030 |
26.50 |
2.00 |
|
3.80 |
1.20 |
0.25 |
6.50 |
0.040 |
0.020 |
0.70 |
| Density (Kg.m-1) |
78.1 |
| Magnetic Permeability |
33 |
| Young’s Modulus (N/mm2) |
220 x 103 |
| Specific Heat, 20°C (J.Kg-1.°K-1) |
475 |
| 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 |
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|
|
FERRALIUM to MLA-MPS-255-FG46-BAR |
| |
|
|
ASTM A276 Condition S |
| |
| The major utilisation of FERRALIUM 255-FG46 is for fasteners
and actuators in the following industrial applications: |
| |
| Chemical Process Industry: |
| Sulphuric Acid Production, Nitric Acid Processes, Polypropylene
Production, PVC Production, Titanium Dioxide Production, Caustic
Evaporators, Equipment Handling Organic and Fatty Acids |
| |
 |
| |
| Marine Industry and Shipbuilding: |
| Rudders, Shaft Seals, Pumps, Valves, Instrumentation, Oil
and Chemical Tankers |
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|
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| Oil and Gas Industry: |
| Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea
Equipment |
| |
|
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| Pollution Control: |
| Fans and pumps, Wet Scrubbers, Incinerators |
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|
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| Pulp and Paper Industry: |
| Digester Blow Valves, Rotary Feed Valves, I.D.Fans, Brownstock
Washers, Precipitators, Bleaching Components |
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|
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| Food Industry: |
| Processing plant |
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|
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| Agrochemicals: |
| Fertiliser Production (Wet phosphoric acid) |
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|
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| Civil Engineering: |
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| Machining
Advice |
Back
to Top |
| It should be noted
that machining of FERRALIUM 255-FG46 can result in
the reduction of mechanical properties
due to stress relief of the work-hardened microstructure. |
|
| 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 |
FERRALIUM
255-FG46 |
S17400
(17-4PH) |
Ti
Grade 5 |
ASTM A193B7 |
MONE
K-500 |
| 0.2% Proof Strength (N/mm2), minimum |
720 |
1070 |
760 |
720 |
760 |
| Corrosion Rate
(mm.y-1) Seawater |
<0.01 |
~1 |
<0.01 |
High |
<0.01 |
Corrosion Rate (mm.y-1)
10% sulphuric acid at 80°C |
<0.15 |
10 |
>1 |
High |
<0.15 |
Corrosion Rate (mm.y-1)
Boiling 50% nitric acid |
<0.15 |
<0.15 |
<0.15 |
High |
<0.5 |
| Wear Properties related to Hardness (HBN) |
RC28 |
RC38 |
RC33 |
RC20 |
RC28 |
|
| Back
to Top |
| |
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 |
|
