FERMONIC 50® Annealed

 

ALLOY TYPE FERMONIC®
ALLOY NAME FERMONIC® 50 Annealed

Stock Sizes
   
 
Basic Properties - Mechanical Properties
0.2% Proof Stress (N/mm2 )[ksi] minimum 415 [60.2]
Ultimate Tensile Strength (N/mm2) [ksi] minimum 725 [105.1]
Elongation (%) minimum 35
Hardness (HBN) 270max
Additional Testing  
Magnetic Permeability <1.05




Alloy Features Back to Top
   
High strength compared to 316L and 317L austenitic stainless steels
   
Excellent ductility and impact strength at both ambient and sub-zero temperatures
   
Listed in MR-01-75 for sour service oilfield applications
   
Non-magnetic
   
Higher resistance to abrasion, erosion and cavitation erosion than 316 and 317 stainless
   



Chemical Specification Back to Top
Elements C Cr Fe Mo Mn N Ni Nb P S Si V
Minimum   20.5 REMAINDER 1.5 4.0 0.2 11.5 0.1       0.1
Maximum 0.06 23.5 6.00 3.0 6.0 0.4 13.5 0.3 0.45 0.3 1.0 0.3



Physical Properties Back to Top
Density (Kg.m-3) 7880
Magnetic Permeability <1.01
Young’s Modulus (N/mm2) 197x 103
Specific Heat 20°C (J.Kg-1.°K-1) 475
Electrical resistance, 20°C (µ.Ω.m) 0.82
Thermal conductivity, 20°C (W.m-1.°K-1) 13.3
Mean coefficient of thermal expansion, 20-100°C  (°K-1) 17.9 x 10-6

Specifications Back to Top
   
FERMONIC 50 to MLA-MPS-25VH-BAR/FORG
   
ASTM A479 Bar S20910 XM-19 Annealed
   
ASTM A276 S20910 XM-19 Condition A
   

ASTM A182 Forgings XM-19
   

 

Applications Back to Top
 

Chemical Process Industry:
Sulphuric Acid Production, Nitric Acid Processes, Polythionic acid resistant, Urea Production,  Equipment Handling Organic and Fatty Acids
 
Marine Industry and Shipbuilding:
Pumps, Valves, Masts, Tie downs

Oil and Gas Industry:
Downhole equipment
 
Food Industry:
Listed in food handling standards as an acceptable material for food contact surfaces

Pulp and Paper Industry:
Valves and fittings

 

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 250 rpm 0.125(0.005)  
Drilling 25.4mm(1") dia 150 rpm 0.28(0.011)  
Turning - Roughing 27 - 42 ( 90 - 140 ) 0.2-0.38 (0.008-0.015) 3 (0.125)
Turning - Finishing 35 - 60 ( 120 - 190 ) 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 316-type austenitic stainless steels

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

Excellent ductility and impact  strength at both ambient and sub-zero  temperatures

Applicable for sour service operation

Low magnetic permeability

 

Alloy Comparisons S20910 S32205 718 (Aged) S31254 FERRALIUM 255-SD50
(0.2% Proof Strength, N/mm2) 420 510 827 325 610

Corrosion Rate (mm.y-1)Seawater

 <0.01 <0.01 <0.18 <0.01 <0.01

Corrosion Rate (mm.y-1)10% sulphuric acid at 80°C

 0.7 0.4 0.15 1.5 <0.15

Corrosion Rate (mm.y-1) Boiling 50% nitric acid

0.18 <0.15 0.15 <0.4 <0.15
Wear Properties related to Hardness (HRC) RC27 RC25 RC38 RC20 RC27



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