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ASTM A897 Austempered Ductile Iron Isothermal Quenching Process Foundry

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ASTM A897 Austempered Ductile Iron Isothermal Quenching Process Foundry

China ASTM A897 Austempered Ductile Iron Isothermal Quenching Process  Foundry supplier
ASTM A897 Austempered Ductile Iron Isothermal Quenching Process  Foundry supplier ASTM A897 Austempered Ductile Iron Isothermal Quenching Process  Foundry supplier

Large Image :  ASTM A897 Austempered Ductile Iron Isothermal Quenching Process Foundry

Product Details:

Place of Origin: China
Brand Name: Non-Standard
Model Number: Customized

Payment & Shipping Terms:

Minimum Order Quantity: 1 Ton
Price: quote according to different drawing technique requirements
Packaging Details: Plywood crate + VCI Anti-Rust Bag
Delivery Time: within 60 days
Payment Terms: T/T, L/C
Supply Ability: 300 Tons every month
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Detailed Product Description
Material: ASTM A897/897M Grade 1200/850/04 Process: Green Sand Casting Process
Machining: CNC Machining Surface: Anti-Rust Oil
Packing: Plywood Crate + VCI Anti-Rust Bag Heat Treatment: Isothermal Quenching Process

ASTM A897 Austempered Ductile Iron Isothermal Quenching Process Foundry

 

 

Product Description and Process

ADI Austempered Ductile Iron Castings Isothermal Quenching Process ASTM A897 Grade 1200/850/04

 

Production process: green sand molding

Machining process: CNC machining, drill, mill, etc.

Heat treatment process: isothermal quenching process

Surface treatment process: paint coating

 

Product Material and Uses

Normally produce with

ASTM A897/897M

Grade 750/500/11,

Grade 900/650/09,

Grade 1050/750/07,

Grade 1200/850/04,

Grade 1400/1100/02,

Grade 1600/1300/01.

 

The austempered ductile iron casting products are widely used for auto-car components, trailer suspension system, truck parts, crankshafts, railcar wheels, cylinder lock cases, tow hooks, cylinder liner, agricultural machinery components, etc.

 

What is Austempered Ductile Iron (ADI)?

Austempered ductile iron castings, or more commonly ADI castings, is a ductile iron casting which is processed by a special heat treatment. The austempering process, with ductile iron’s superior castability, results in a material which can be used to cast complex shapes, with a greater consistency of quality, and often at less cost. The heat treatment requires an interrupted quench, usually into a salt bath, to cool the cast part at a planned rate and long enough to achieve the desired austempered result. The resulting material has a combination of exceptional strength and toughness, meeting and often exceeding those of alloy steels.

 

What are some Benefits of Austempered Ductile Iron Castings?

Up to 40% less cost than hardened steel forgings.

Lower operating noise levels.

10% less weight than steel.

Better wear than case hardened steel.

Excellent resistance to crack propagation.

Good impact strength to -120ºF.

Work hardening.

 

Austempered Ductile Iron Castings Properties

ADI is a group of materials whose mechanical properties can be varied over a wide range by a suitable choice of heat treatment. A high austempering temperature, 750F (400°C), produces ADI with high ductility, a yield strength in the range of 500 MPa with good fatigue and impact strength. These grades of ADI also respond well to a surface strain transformation which greatly increases their bending fatigue strength. A lower transformation temperature, 500F (260°C), results in ADI with very high yield strength (1400 MPa (200 MPa)), high hardness, excellent wear resistance and contact fatigue strength. This high strength ADI has lower fatigue strength as-austempered but it can be greatly improved with the proper rolling or grinding process. Thus, through relatively simple control of the austempering conditions, ADI can be given a range of properties unequaled by any other material. Small amounts of alloying elements such as nickel, copper and molybdenum are used to produce the desired heat treated result.

 

 

What are typical ADI Applications?

Abrasive Protection Liners

Bearing Sleeves

Brake Shoes

Bushing Sleeves

Cable Drums

Camshafts

Chain Sprockets

Connecting Rods

Crankshafts

Cultivating Tools

Differential Spiders

Drive Shafts

Engine Mounting Brackets

Friction Blocks

Ground Engaging Tools

Guide Rollers

Hydraulic Pump Bodies

Piston Sleeves

Pulleys

Pump Impellers

Rack and Pinion Gearing

Rocker Arms

Railroad Car Wheels

Rollers and Sprockets

Shredder Knives

Steering Knuckles

Trolley Wheels

Track shoes

Wear Plates and Guides

Wire Guides

 

Is Machining of Austempered Ductile Iron Difficult?

Machining of A.D.I. is generally speaking, possible, using normal machining techniques. Only the tapping of small diameter holes (especially dead end) and scraping of the softest type is very difficult due to work hardening. It is however common practice to machine to near final size and then heat treat. This is possible because the heat treatment is considered “soft”, and the consequent volume changes are small, and predictable with volume expansion of between only 0.2% – 0.4%.

 

British Standards Specification for ADI EN 1564:1997

 

Mechanical Properties measured on test pieces from separately cast samples
Material Symbol Number Tensile Strength
N/mm2 (min)
0.2% Proof Stress
N/mm2 (min)
Elongation
% (min)
EN-GJS-800-8 EN-JS1100 800 500 8
EN-GJS-1000-5 EN-JS1110 1000 700 5
EN-GJS-1200-2 EN-JS1120 1200 850 2
EN-GJS-1400-1 EN-JS1130 1400 1100 1
Refer to relevant Standard for full details

 

 

Standard ADI Grades (USA) ASTM 897-90 (ASTM 897M-90)

Grade Tensile Strength (min) Yield Strength (min) Elongation% Impact Energy * Typical Hardness
BHN
Ksi Nmm2 Ksi Nmm2 Ft-lbs Joules
1 125 850 80 550 10 75 100 269-321
2 150 1050 100 700 7 60 80 302-363
3 175 1200 125 850 4 45 60 341-444
4 200 1400 155 1100 1 25 35 388-477
5 230 1600 185 1300 - - - 444-555
* Un-notched charpy bars tested @ 22'C (+/-4'C)
Refer to relevant Standard for full details

 

 

Grade Tensile* Strength (KSI) Yield* Strength (KSI)

Elongation*

 

Typical Impact Energy (FT-LBS) Typical Brinell Hardness
0 110 70 11 80 241-302
1 130 90 9 75 269-341
2 150 110 7 60 302-375
3 175 125 4 45 341-444
4 200 155 2 25 388-477
5 230 185 1 15 402-512

 

Contact Details
Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

Contact Person: James Wang

Tel: +8613213152686

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