ASTM A536 Ductile Iron

ASTM A536 Ductile Iron

Pump Spare Parts Shell & Impeller Casting Supplier Ductile Iron 65 45 12 Material Product Description and Process Pump Spare Parts Shell & Impeller Casting Supplier Ductile Iron 65 45 12 Material Production process: green sand casting process pre-coated sand casting process resin sand...

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Pump Spare Parts Shell & Impeller Casting Supplier Ductile Iron 65 45 12 Material

Product Description and Process

Pump Spare Parts Shell & Impeller Casting Supplier Ductile Iron 65 45 12 Material


Production process:

green sand casting process

pre-coated sand casting process

resin sand casting process

Weight range: from 50 gram to 2,000 kilograms for ductile iron casting product


Machining process:

CNC machine, machining center, lathe, mill machine, drill machine, etc.


Surface treatment process:

paint coating, electrophoretic paint coating, electrogalvanizing coating, black oxide coating, phosphate treatment,  powder coating, etc.


Product  Material and Uses

Normally production with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, 100-70-03, etc.

The ductile iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.


What is Ductile Iron Used For? (Applications)

Ductile iron is great for use where you need strong metal with wear resistance.

Here is a sample list of things made from or contain ductile iron:

Pipe and pipe fittings (almost 50% of ductile iron sold in the US is for pipe and fittings)

Axles

Connecting rods (like in engines)

Crankshafts

Cylinders

Disc brake calipers

Gears and Gear Boxes

Housings and manifolds

Hydrostatic Barrels

Idler arms

Large Machines

Machine Tooling

Military uses

Piano Harps (the part that holds the strings of a piano)

Spindle supports

Steering knuckles

Suspension system parts

Truck axles

Valves (especially high-pressure valves)

Wheel hubs

Yokes for power transmission


THE IMPACT OF COMPONENT MATERIAL SELECTION ON PUMP RELIABILITY

Selecting the right pump type and sizing it correctly are critical components to the success of any pump application. Equally important is selecting construction materials. The initial cost of these materials is normally the first consideration. Operational costs, replacement costs and longevity of service and repair costs will, however, determine the actual cost of the pump during its lifetime.

Standard pump part materials (such as cast irons, bronzes and low-carbon steels) are typically the least expensive first cost -- and the most readily available for replacement. However, these materials can become more expensive if they cause premature failure and unexpected service and replacement.

Factors that must be considered in selecting materials for wetted pump parts are, for example, user's experience, expected pump life, intermittent or continuous duty, pumping of hazardous or toxic liquids, condition of the liquid, pump suction energy level, and conditions of service (especially suction conditions).


Corrosion

Corrosion is the destructive attack of a metal by chemical or electrochemical reaction with its environment. Corrosion by itself is usually not a difficult problem; in fact, many materials are available to handle most fluids. It is, however, important to understand the various types of corrosion and factors affecting the corrosion rate in order to select the appropriate materials. It can be quite difficult to choose a material to withstand multiple factors, such as corrosion in addition to erosion and/or cavitation.

A general rule of thumb is to first select materials that will withstand corrosion and then select the one with the most appropriate abrasion and/or cavitation resistance. Further, the corrosive properties of the liquid may vary with one or more of the following liquid conditions: temperature, concentration, purity, velocity, suction pressure, entrained air, and entrained solids.


Abrasive Wear

Abrasive wear is the mechanical removal of metal from the cutting or abrading action of solids carried in suspension in the pumped liquid. The rate of wear for any material is dependent upon the following characteristics of the suspended solids:

1. Solid concentration

2. Solids size and mass

3. Solids shape (spherical, angular or sharp fractured surfaces)

4. Solids hardness

5. Relative velocity between solids and metal surface


Common Ductile Iron Grades

While there are many different ductile iron specifications, foundries routinely offer 3 common grades

Physical and Mechanical Properties

ASTM A536,

Grade 60-40-18

ASTM A536,

Grade 65-45-12

ASTM A536,

Grade 80-55-06

Tensile Strength, min, psi

60,000

65,000

80,000

Tensile Strength, min, MPa

414

448

552

Yield Strength, min, psi

40,000

45,000

55,000

Yield Strength, min, MPa

276

310

379

Elongation in 2 in. or 50 mm, min %

18

12

6

Density lb/in3

0.256

0.256

0.256

Density g/cm3

7.1

7.1

7.1

Melting Temperature (Degrees F)

2,100 – 2,190

2,100 – 2,190

2,100 – 2,190

Melting Temperature (Degrees C)

1,150 - 1,200

1,150 - 1,200

1,150 - 1,200

Compressive Strength Ksi

429

429

429

Compressive Strength MPa

2960

2960

2960

UNS

F32800

F33100

F33800


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