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FERRALIUM 255-FG46

FERRALIUM^® 255-FG46

Alloy	Common Name	Related Specifications			Tensile Strength	Proof Stress	Elongation
Alloy	Common Name	British	European	United States	Tensile Strength	Proof Stress	Elongation
FERRALIUM 255-FG46	Fastener Grade			ASTM A276 UNS S32550 Condition S	860 [124.7]	720 [104.4]	25-35

FERRALIUM^® 255-FG46

Specifications of Ferralium 255-FG46

FERRALIUM to MLA-MPS-255-FG46-BAR
ASTM A276 Condition S

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Purchase Specifications >
FERRALIUM 255-FG46 Bar Purchase Specification

Technical Data Sheets >
Machining FERRALIUM 255

Chemical Specification of Ferralium 255-FG46

Basic Properties of Ferralium 255-FG46 - Mechanical Properties

Physical Properties of Ferralium 255-FG46

Applications of Ferralium 255-FG46

Ferralium 255-FG46 Features

Forms of Ferralium 255-FG46 Available

Machining Advice of Ferralium 255-FG46

Alloy Comparisons

Disclaimer
Data in this Ferralium 255-FG46 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		24.5	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

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]

Additional Testing
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

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 (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-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

FERRALIUM® 255-FG46