Alloy 2205

 

ALLOY TYPE Alloy
ALLOY NAME Alloy 2205

 
Basic Properties - Mechanical Properties
0.2% Proof Stress (N/mm2 ) [ksi] minimum 450 [65.2]
Ultimate Tensile Strength (N/mm2) [ksi] minimum 760 [94.2]
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]



Additional Testing Back to Top
ASTM G48A Corrosion test at 40°C No pitting and weight loss <4.0 g/m2
Ultrasonic Testing According to ASTM A388
Ferrite Content 35%-55%
Microstructure Microstructure certified free from grain boundary carbides, sigma, chi and laves phases



Alloy Features Back to Top
   
Higher strength than standard stainless steels
   
Higher corrosion resistance than 316 stainless steel in a wide variety of corrosive chemicals including sulphuric, phosphoric and nitric acids
   
Good resistance to pitting and crevice corrosion in seawater
 

 

High stress corrosion resistance

 

 

Lower thermal expansion than austenitic stainless steels
 

 

Higher thermal conductivity than austenitic stainless steels


Chemical Specification Back to Top
Elements Cr Fe Mo N Ni P S Si
Minimum 22.00 REMAINDER 3.00 0.14 4.50     0.20
Maximum 23.00   3.50 0.20 5.50 0.030 0.020 0.70



Physical Properties Back to Top
Density (Kg.m-1) 7810
Magnetic Permeability <50
Young’s Modulus (N/mm2) 190 x 103
Specific Heat, 20°C (J.Kg-1.°K-1) 400
Specific Electrical Resistance, 20°C (µΩ.m) 0.85
Thermal conductivity, 20°C (W.m-1.°K-1) 15
Mean coefficient of thermal expansion, 20-100°C (°K-1) 11 x 10-6



Specifications Back to Top
 

 

Alloy 2205 to MLA-MPS-22V-BAR

EN 10088-3 1.4462

ASTM A182 UNS S31803 Forgings Grade  F51

ASTM A182 UNS S32205 Forgings Grade  F60

ASTM A240 UNS S31803 Sheet and Plate

ASTM A240 UNS S32205 Sheet and Plate
ASTM A479 UNS S31803 Bar
ASTM A479 UNS S32205 Bar
ASTM A276 UNS S31803 Bar
ASTM A76 UNS S32205 Bar

 

Applications Back to Top
 
Chemical Process Industry Bearing Components:

Chemical Process Industry:
Sulphuric Acid Production, Nitric Acid Processes, Phosphoric Acid Processes, Ethylene oxide, Polypropylene Production, PVC, Equipment Handling Organic and Fatty Acids, Chemical Storage and Tankers, Heat Exchangers
 
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, Separators, Heat Exchangers
 
Pollution Control:
Waste water treatment, Sour water purification

Pulp and Paper Industry:
Pulp liquor heaters, Bleach Tower Linings, Digesters, Brownstock Washers

Food Industry:
Brewery Piping, Evaporators, Hot liquor tanks, Presses

 

Machining Advice Back to Top
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°

KEY Features  of the Alloy

Higher strength than austenitic stainless steels

Excellent general corrosion resistance in a wide variety of corrosive chemicals including seawater and industrial acids

Excellent resistance to localised corrosion including intergranular, pitting and crevice corrosion

Excellent resistance to stress corrosion cracking

Good sulphide stress corrosion resistance

High resistance to abrasion, erosion and cavitation erosion

Lower thermal expansion and higher heat conductivity than austenitic stainless steels



Alloy Comparisons FERRALIUM 255-SD50 S17400(17-4PH) S32205 718
(ST)
0.2% Proof Strength (N/mm2), minimum 600 1070 450 550
max
Corrosion Rate (mm.y-1) Seawater <0.01 ~1 <0.01 <0.01
Corrosion Rate (mm.y-1)
10% sulphuric acid at 80°C		 <0.15 10 0.4 <0.15
Corrosion Rate (mm.y-1)
Boiling 50% nitric acid 		<0.15 <0.15 <0.15 <0.15
Wear Properties related to Hardness (HRC) RC28 RC38 RC25 RC20



 Back to Top
 
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