Pubblicabile Zanardi Fonderie S.p.A.zanardifonderie.com/wp-content/uploads/2013/04/ADI_JS800_10.pdf · Zanardi Fonderie S.p.A. INFORMATIONAL SHEET ON AUSTEMPERED DUCTILE IRON Pubblicabile

Zanardi Fonderie S.p.A.

INFORMATIONAL SHEET ON AUSTEMPERED DUCTILE IRON - ISO 17804 JS/800-10 and ISO 17804 JS/800-10 RT -

03 Aggiornamento dati “Other Properties 24.06.2008 VEN 02 Aggiornamento da RTC IMPACT 06.05.2008 VEN 01 Aggiornamento da formato 06.05.2008 VEN 00 Aggiornamento dati da G6016 21.09.2007 VEN Rev Descrizione Data Firma

© Zanardi Fonderie Spa Italy Ed.02 Rev.03 – 2007 – All rights reserved Pag. 1/9

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Scope This document is designed to familiarize the designer with Austempered Ductile Iron ISO 17804 Grade JS/800-10. It is also valid for the ISO 17804 JS/800-10RT that is similar to JS/800-10 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: 2007 2. 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 2005 7. ISO 6336-5 “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 heat-treating an alloyed ductile iron, casted with a special preconditioning of the metal bath. The matrix structure of the grade JS/800-10 consists predominantly of ferrite and austenite. The new matrix is called “ausferritic” and gives to the new material unique mechanical properties.

Zanardi Fonderie S.p.A. INFORMATIONAL SHEET ON AUSTEMPERED DUCTILE IRON

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- ISO 17804 JS/800-10 and ISO 17804 JS/800-10 RT -

Examples of microstructure and static fracture behaviour MICRISTRUCTURE

100 x 500 x FRACTURE SURFACE

GS

600

-3

IDI

AD

I800

-8

AD

I105

0-6

40C

rNi4

-



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Material designation ISO 17804 JS/800-10/S [f] ISO 17804 JS/800-10RT/S [f], similar to JS/800-10 but with impact as additional requirement.

Static Material properties on test pieces machined from separately cast samples

Zanardi Data (Ref. 4)

Standard Data (Ref. 2)

Other Data Property

Relevant wall

thickness mm

Symbol Measure unit

Test Standard Minimum

Values Typical Values

Not

es

Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values N

otes

t ≤ 30

30 < t ≤ 60 Brinell Hardness

60 < t ≤ 100

HBW ISO 6506-1 250 270 [a] 250 310

t ≤ 30 800 847 800

30 < t ≤ 60 750 [e] 750 Tensile strength

60 < t ≤ 100

Rm MPa ISO 6892

720 [e]

[a]

720

t ≤ 30

30 < t ≤ 60 0.2% Yield strength

60 < t ≤ 100

Rp0.2 MPa ISO 6892 500 574 [a] 500

t ≤ 30 10 13.8 10

30 < t ≤ 60 6 [e] 6 Elongation

60 < t ≤ 100

A5 % ISO 6892

5 [e]

[a]

5



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Impact Material properties on test pieces machined from separately cast samples



Other Data Property

Relevant wall

thickness mm

Symbol Measure unit



Not

es

Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values N

otes

t ≤ 30 mm 10 (9) [e] 10 (9)

30 < t ≤ 60 9 (8) [e] 9 (8)

Impact-resistance T=23 ± 5 ºC ; V-notched Average & (minimum single value) 60 < t ≤ 100

KV J ISO 148-1ISO 148-2ISO 148-3

8 (7) [e]

[a] [d]

8 (7)

[d]

t ≤ 30 7.7 -

30 < t ≤ 60 [e] -

Impact -resistance T=-20 ºC ; V-notched Average & (minimum single value) 60 < t ≤ 100

KV J ISO 148-1ISO 148-2ISO 148-3

[e]

[a]

-

t ≤ 30 6.2 -

30 < t ≤ 60 [e] -

Impact -resistance T= -40 ºC ; V-notched Average & (minimum single value) 60 < t ≤ 100

KV J ISO 148-1ISO 148-2ISO 148-3

[e]

[a]

-

t ≤ 30 115 123 - 110

30 < t ≤ 60 [e] - Impact -resistance T=23 ± 5 ºC ; Unnotched Average

60 < t ≤ 100

K J ISO 148-1ISO 148-2ISO 148-3

[e]

[a]

-

[d]

t ≤ 30 120 -

30 < t ≤ 60 [e] - Impact -resistance T=-20 ºC ; Unnotched Average

60 < t ≤ 100

K J ISO 148-1ISO 148-2ISO 148-3

[e]

[a]

-

t ≤ 30 104 -

30 < t ≤ 60 [e] - Impact -resistance T= -40 ºC ; Unnotched Average

60 < t ≤ 100

K J ISO 148-1ISO 148-2ISO 148-3

[e]

[a]

-

Fracture toughness KIC MPa/ m1/2 ASTM E399-90 [e] - 62 [d]



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Fatigue material properties on test pieces machined from separately cast samples



Other Data Property

Relevant wall

thickness mm

Symbol Measure unit



Not

es

Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values N

otes

t ≤ 30 400 - 375

30 < t ≤ 60 [e] - -

Fatigue Limits (Wohler) (Rotating Bend) unnotched (Ø10.6 mm) N = 2 x 106 cycles

60 < t ≤ 100

σAG MPa Short Stair case

[e]

[b]

- -

[d]

Endurance Ratio (Wöhler) – Typical value (rotating bending) unnotched (diameter 10,6 mm) N = 5 × 106 cycles Probability of survival 50% Confidence 95%

ΔσAG / 2 Rm MPa / MPa 0.47 [b] 0.50 [d]

Slope coefficient (Wöhler) – Typical value (rotating bending) unnotched (diameter 10,6 mm) N = 5 × 106 cycles Probability of survival 50% Confidence 95%

k ASTM 739-91 10 [b]

Notch sensitivity a0 (rotating bending) N = 5 × 106 cycles Probability of survival 50% Confidence 95%

a0 μm 134 [b]

Notch sensitivity ΔKTh (rotating bending) N = 5 × 106 cycles Probability of survival 50% Confidence 95%

ΔKTh MPa /m1/2 16.8 [b]



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Tooth rooth bending fatigue properties and contact fatigue properties on test pieces machined from separately cast samples



Other Data Property

Relevant wall

thickness mm

Symbol Measure unit



Not

es

Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values N

otes

Hertzian pressure Allowable fatigue strength σH lim MPa [e] 1050 989 [c

.1]

Tooth-root bending fatigue strength Probability of 90% N = 107 cycles as machined

σF lim MPa [e] 350 334 [c.1

]

Tooth-root bending fatigue strength Probability of 90% N = 107 cycles as machined and shot peened

σF lim MPa [e] 597 [c.1

]



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Material properties on test pieces machined from samples cut from a casting

Zanardi Data (Ref.4)

Standard Data (Ref.2)

Other Data

Property Relevant

wall thickness

mm Symbol Measure

unit Test

Standard Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values

Not

es

t ≤ 30 790 884 790

30 < t ≤ 60 740 866 740 Tensile strength

60 < t ≤ 100

Rm MPa ISO 6892

710 854

[a]

710

0.2% Yield strength - Rp0.2 MPa ISO 6892 500 616 [a] 500

t ≤ 30 8 12,6 8

30 < t ≤ 60 5 12,9 5 Elongation

60 < t ≤ 100

A5 % ISO 6892

4 10,3

[a]

4

t ≤ 30 - >129 [e] - 110

30 < t ≤ 60 - 129 - - Impact -resistance T=23 ± 5 ºC ; Unnotched Average

60 < t ≤ 100

K J ISO 148-1 ISO 148-2 ISO 148-3

- 91

[a]

- -

t ≤ 30 - [e] -

30 < t ≤ 60 - 101 - Impact -resistance T=-20 ºC ; Unnotched Average

60 < t ≤ 100

K J ISO 148-1ISO 148-2ISO 148-3

- 65

[a]

-

t ≤ 30 - [e] -

30 < t ≤ 60 - 68 - Impact -resistance T= -40 ºC ; Unnotched Average

60 < t ≤ 100

K J ISO 148-1 ISO 148-2 ISO 148-3

- 58

[a]

-

t ≤ 30 - [e] -

30 < t ≤ 60 - 356 -

Fatigue Limits (Wohler) (Rotating Bend) unnotched (Ø10.6 mm) N = 2 x 106 cycles 60 < t ≤ 100

σAG MPa Short Stair case

- 397

[b]

-



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Other material properties Zanardi Data

(Ref.4) Standard Data

(Ref.2) Other Data

Property Sentence Minimum Values

Typical Values N

otes

Minimum Values

Typical Values N

otes

Minimum Values

Typical Values N

otes

Better than Pearlitic IDI Low temperature

properties Worse than ADI 1050

Steel

[b]

Machining Relative values vs pearlitic DI=100 100 [a]

Better than Steel Noise dumping

Worse than

AGI [c.3

]

Zanardi Data

(Ref.4) Standard Data

(Ref.2) Other Data

Property Symbol Measure unit Minimum


Not

es

Minimum Values

Typical Values

Not

es

Minimum Values

Typical Values

Not

es

Compression Strenght σdb N/mm2 1300

Shear Strenght σaB N/mm2 720

Torsional Strenght σiB N/mm2 720

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 / cm3 7.1 [d]

Linear expansion coefficient from 20 °C to 400 °C

α µM(m⋅K) 14-18 [d]

Thermal conductivity at 300 °C λ W(m⋅K) 20-23 [d]

Maximum temperature °C 280 [b] -

Property Description

Effect of shot peening [e]

Effect of grinding, fillet rolling, shot blasting Respond significantly

Performance in gear applications (Ref.5)

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/800-10 exceeds the performance of ductile iron gears and competes favorably with through hardened steel gears of similar hardness.

Economical performance Grade JS/800-10 may be an economical alternative for parts that require extensive machining after austempering.



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Notes: [a] Data from Zanardi Fonderie S.p.A. mass production. The “Typical 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 “Typical 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 6336-5 “Calculation of load capacity of spur and helical gears” Part 5: Strength and quality of materials. [d] Normative value for JS/800-10 RT/S only. Informative only for JS/800-10/S. [e] Data under upgrading. [f] Material designation according to ISO 17804 & ISO/TR 15931


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Pubblicabile Zanardi Fonderie S.p.A.zanardifonderie.com/wp-content/uploads/2013/04/ADI_JS800_10.pdf · Zanardi Fonderie S.p.A. INFORMATIONAL SHEET ON AUSTEMPERED DUCTILE IRON Pubblicabile