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FERRALIUM 255-3AF

FERRALIUM^® 255-3AF

Alloy	Common Name	Related Specifications			Tensile Strength	Proof Stress	Elongation
Alloy	Common Name	British	European	United States	Tensile Strength	Proof Stress	Elongation
FERRALIUM 255-3AF	Alloy 255 Aged Grade		Stami carbon 21022, 18005, 53961 MS47		860 [124.7]	570 [82.6]	23

FERRALIUM^® 255-3AF

Specifications of Ferralium 255-3AF

FERRALIUM to MSA-MDS-51VA-BAR
STAMICARBON 21022

Downloads
Past Papers >
The Influence of Copper on the Pitting Corrosion of Duplex Stainless Steels UNS S32550 L F Garfias-Mesias J M Sykes and C D S Tuck Corrosion Vol 54 No 1 1998 p 40

Technical Data Sheets >
Machining FERRALIUM 255

Chemical Specification of Ferralium 255-3AF

Basic Properties Ferralium 255-3AF - Mechanical Properties

Physical Properties of Ferralium 255-3AF

Applications of Ferralium 255-3AF

Ferralium 255-3AF Features

Forms of Ferralium 255-3AF Available

Machining Advice of Ferralium 255-3AF

Alloy Comparisons

Disclaimer
Data in this Ferralium 255-3AF page 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

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

0.2% Proof Stress (N/mm² ) [ksi] minimum	570 [82.6]
Ultimate Tensile Strength (N/mm²) [ksi] minimum	830 [120.3]
Elongation (%) minimum	23
Hardness (HBN)	250-330
Charpy V-notch Impact at ambient Temp (J) [ft.lb]	70min [51.6min]

Additional Testing
ASTM A262 Corrosion test Practice B	Weight loss <0.54g/m²/h
Ultrasonic Testing	According to ASTM E114
Ferrite Content	35%-55%
Microstructure	Microstructure certified free from grain boundary carbides, sigma, chi and laves phases

Density (Kg.m^-1)	78.1
Magnetic Permeability	33
Young’s Modulus (N/mm²)	200 x 10³
Specific Heat, 20°C (J.Kg^-1.°K^-1)	475
Specific Electrical Resistance, 20°C (µO.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

Alloys	Bars & Sections	Hot & Cold Rolled Plate	Ingot & Billet	Forged Products	Sand Castings
FERRALIUM 255-SD50
FERRALIUM 255-SD40
FERRALIUM 255-3SF
FERRALIUM 255-3AF
FERRALIUM 255-3SC
FERRALIUM 255-FG46
ALLOY 2507
ALLOY S32760

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 255-3AF	S17400(17-4PH)	S32205	718 (ST)
0.2% Proof Strength (N/mm²), minimum	570	1070	300	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)	RC30	RC38	RC20	RC20

FERRALIUM® 255-3AF