Zanardi Fonderie S.p.A. INFORMATIONAL SHEET ON AUSTEMPERED DUCTILE IRON - ISO JS/ and ISO JS/ RT -

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1 ISO JS/80010 and ISO JS/80010 RT Scope This document is designed to familiarize the designer with Austempered Ductile Iron ISO Grade JS/ It is also valid for the ISO JS/80010RT that is similar to JS/80010 but with impact as additional requirement. It is a reference document, not to be referred to as a standard. The data in this document are taken from Zanardi research database, international standards, and technical papers. Disclaimer The content of this informational sheet has to be considered for information only. The real component design shall be based only upon international standards and/or contractual agreements. References 1. ZANARDI STANDARD 101: ISO 17804:2005 Founding Ausferritic Spheroidal Graphite Cast irons Classification 3. ISO 1083:2004 Founding Spheroidal graphite cast irons 4. ZANARDI Database 5. SAE J2477 Rev. May 2004 Automotive Austempered Ductile (Nodular) Iron Castings (ADI) 6. AGMA Informational Sheet on Austempered Ductile Iron (ADI) Draft 13 June ISO Calculation of load capacity of spur and helical gears Part 5: Strength and quality of materials 8. MATWEB.COM The Online Materials Database Editorial note The number between parentheses near to the data or descriptions indicates the referenced source. Material notes Austempered Ductile Iron (ADI) is produced by heattreating an alloyed ductile iron, casted with a special preconditioning of the metal bath. The matrix structure of the grade JS/80010 consists predominantly of ferrite and austenite. The new matrix is called ausferritic and gives to the new material unique mechanical properties. 03 Aggiornamento dati Other Properties VEN 02 Aggiornamento da RTC IMPACT VEN 01 Aggiornamento da formato VEN 00 Aggiornamento dati da G VEN Rev Descrizione Data Firma Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 1/9

2 ISO JS/80010 and ISO JS/80010 RT Examples of microstructure and static fracture behaviour MICRISTRUCTURE 100 x 500 x FRACTURE SURFACE ADI10506 ADI CrNi4 IDI GS 6003 Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 2/9

3 ISO JS/80010 and ISO JS/80010 RT Material designation ISO JS/80010/S [f] ISO JS/80010RT/S [f], similar to JS/80010 but with impact as additional requirement. Static Material properties on test pieces machined from separately cast samples (Ref. 4) (Ref. 2) t 30 Brinell Hardness 30 < t 60 HBW ISO [a] t Tensile strength 30 < t 60 Rm MPa ISO [a] 750 t % Yield strength 30 < t 60 Rp0.2 MPa ISO [a] 500 t Elongation 30 < t 60 A5 % ISO [a] Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 3/9

4 ISO JS/80010 and ISO JS/80010 RT Impact Material properties on test pieces machined from separately cast samples (Ref. 4) (Ref. 2) Impactresistance T=23 ± 5 ºC ; Vnotched Average & (minimum single value) t (9) 10 (9) [a] V J ISO (8) [d] 9 (8) ISO (7) 8 (7) [d] Impact resistance t T=20 ºC ; Vnotched V J ISO 1482 [a] Average & (minimum ISO 1483 single value) Impact resistance t T= 40 ºC ; Vnotched V J ISO 1482 [a] Average & (minimum ISO 1483 single value) Impact resistance T=23 ± 5 ºC ; Impact resistance T=20 ºC ; Impact resistance T= 40 ºC ; t J ISO 1482 [a] ISO 1483 t J ISO 1482 [a] ISO 1483 t J ISO 1482 [a] ISO 1483 [d] 1/2 ASTM Fracture toughness K IC MPa/ m E [d] Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 4/9

5 ISO JS/80010 and ISO JS/80010 RT Fatigue material properties on test pieces machined from separately cast samples (Ref. 4) (Ref. 2) Fatigue Limits (Wohler) (Rotating Bend) unnotched (Ø10.6 ) N = 2 x 10 6 cycles t < t 60 σ AG MPa Short Stair case [b] [d] Endurance Ratio (Wöhler) value (rotating bending) unnotched (diameter 10,6 ) N = cycles Probability of survival 50% Confidence 95% Δσ AG / 2 Rm MPa / MPa 0.47 [b] 0.50 [d] Slope coefficient (Wöhler) value (rotating bending) unnotched (diameter 10,6 ) N = cycles Probability of survival 50% Confidence 95% k ASTM [b] Notch sensitivity a 0 (rotating bending) N = cycles Probability of survival 50% Confidence 95% a 0 μm 134 [b] Notch sensitivity ΔK Th (rotating bending) N = cycles Probability of survival 50% Confidence 95% ΔK Th MPa /m 1/ [b] Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 5/9

6 ISO JS/80010 and ISO JS/80010 RT Tooth rooth bending fatigue properties and contact fatigue properties on test pieces machined from separately cast samples (Ref. 4) (Ref. 2) Hertzian pressure Allowable fatigue strength σ H lim MPa [c.1] Toothroot bending fatigue strength Probability of 90% N = 10 7 cycles as machined σ F lim MPa [c.1] Toothroot bending fatigue strength Probability of 90% N = 10 7 cycles as machined and shot peened σ F lim MPa 597 [c.1] Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 6/9

7 ISO JS/80010 and ISO JS/80010 RT Material properties on test pieces machined from samples cut from a casting (Ref.4) (Ref.2) t Tensile strength 30 < t 60 Rm MPa ISO [a] % Yield strength Rp0.2 MPa ISO [a] 500 t ,6 8 Elongation 30 < t 60 A5 % ISO ,9 [a] ,3 4 Impact resistance T=23 ± 5 ºC ; Impact resistance T=20 ºC ; Impact resistance T= 40 ºC ; Fatigue Limits (Wohler) (Rotating Bend) unnotched (Ø10.6 ) N = 2 x 10 6 cycles t 30 > J ISO [a] ISO t 30 J ISO [a] ISO t 30 J ISO [a] ISO t 30 Short 30 < t 60 σ AG MPa 356 [b] Stair case 397 Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 7/9

8 ISO JS/80010 and ISO JS/80010 RT Other material properties Sentence (Ref.4) (Ref.2) Low temperature properties Machining Better than Worse than Relative values vs pearlitic DI=100 Pearlitic IDI ADI 1050 Steel [b] 100 [a] Noise dumping Better than Worse than Steel AGI [c.3] (Ref.4) (Ref.2) Compression Strenght σ db N/ Shear Strenght σ ab N/ Torsional Strenght σ ib N/ Modulus od elasticity E GPa 177 [a] 170 [d] Poisson s ratio ν 0.27 [d] Shear modulus G GPa 69.7 [a] 65 [d] Density ρ gr / cm [d] Linear expansion coefficient from 20 C to 400 C Thermal conductivity at 300 C Maximum temperature α µm(m K) 1418 [d] λ W(m K) 2023 [d] C 280 [b] Effect of shot peening Description Effect of grinding, fillet rolling, shot blasting Performance in gear applications (Ref.5) Economical performance Respond significantly The Young modulus of ADI I lower than that of steel. Therefore, for a given input load, the contact area will be greater, due to the increased conformance of the material. This conformance contributes to lower noise and a reduced contact load for a given input. With graphite nodules in its Ausferrite matrix, ADI has better noise damping than steel. Grade JS/80010 exceeds the performance of ductile iron gears and competes favorably with through hardened steel gears of similar hardness. Grade JS/80010 may be an economical alternative for parts that require extensive machining after austempering. Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 8/9

9 ISO JS/80010 and ISO JS/80010 RT : [a] Data from Zanardi Fonderie S.p.A. mass production. The value of each characteristic is the mean of the statistical population of the sample. [b] Data from Zanardi Fonderie S.p.A. Research database. The value of each characteristic is the mean of the statistical population of the sample. This value have to be taken as an information for the material but the statistical population of the sample is too low to determine a Process Capability. [c] c.1 Data from AGMA database. This value have to be take as an information for the material but its validity is not guarantee by Zanardi Fonderie S.p.A c.2 Data from MATWEB database. c.3 Data from SAE J2477 Rev. May 2004 Automotive Austempered Ductile (Nodular) Iron Castings (ADI). c.4 Data from ISO Calculation of load capacity of spur and helical gears Part 5: Strength and quality of materials. [d] Normative value for JS/80010 RT/S only. Informative only for JS/80010/S. Data under upgrading. [f] Material designation according to ISO & ISO/TR Zanardi Fonderie Spa Italy Ed.02 Rev All rights reserved Pag. 9/9