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Home » Stainless Steel » Product introduction

Alloy 28 Steel

Numbers: 2011081802
Model: Alloy 28
Producers: China
Update time: 2011.08.18
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Product Description:

Alloy steel

Alloy 28 Steel

UNS number: N08028

ISO category: 27-31-4

Common names: Sanicro 28

What is Alloy 28

Alloy 28 is a nickel based alloy (Ni/Fe/Cr) with good corrosion resistance and a high range of mechanical strength. The alloy was originally developed for use in the manufacture of phosphoric acid. Typical yield strength in the annealed condition is 220 MPa. All tubulars for casing and tubing are delivered in the cold worked condition with yield strength from 760 to 965 MPa.

Delivery conditions

Solution annealed and cold worked.

Applications

The alloy is used extensively within chemical processing plants and downhole tubulars is deep and sour gas wells.

Chemical composition

Table 1: Chemical composition

C Si Mn P S Ni Cr Mo Al Ti

Min - - - - - 29.5 26.0 3.0 - -

Max 0.03 1.0 2.5 0.03 0.03 32.5 28.0 4.0 - -

Nb(Cb) Cu Co B Fe W V N O H

Min - 0.6 - - Bal - - - - -

Max - 1.4 - - - - - - - -

Mechanical and physical properties

An introduction to mechanical and physical properties follows. These properties are dependent on the cold working. Detailed data is available in material datasheets from suppliers and material property handbooks.

Table 2: Mechanical properties, grade 110ksi, cold worked

Mechanical properties -40ºC 20ºC 200ºC

Tensile strength, yield (min.) - 760 MPa (110 ksi) -

Tensile strength, yield (typical) - - -

Tensile strength, ultimate (min.) - 795 MPa (115 ksi) -

Tensile strength, ultimate (typical) - -

Tensile modulus (typical) - 195 GPa 182 GPa

Torsion modulus (typical) - - -

Elongation (min.) - 11% -

Red. of area (min.) - - -

Charpy V-notch impact (typical) Good - -

Fracture toughness KIC (typical) - - -

Hardness (ISO 15156-3 limit) - See below -

Hardness (typical) - See below -

Fatigue strength (% of T.S.U) - - -

Available grades for tubes in accordance with ISO 13680 are 110, 125 and 140ksi. All tubes are delivered in the cold worked (CW) condition. Maximum hardness for each grade is:

Table 3: Delivery conditions and hardness limitations

Grade Delivery condition HRC (max) available HRC (max) ISO 15156-3

110 CW 35 40

125 CW 37 40

140 CW 38 40

Table 4: Physical properties

Physical properties -40ºC 20ºC 200ºC

Density - 8.0 g/cm3 -

Thermal expansion coefficient - 15.0 10-6K-1 15.0 10-6K-1

Thermal conductivity - 10.0 Wm-1K-1 14.0 Wm-1K-1

Specific heat - 460 JKg-1K-1 450 JKg-1K-1

Electrical resistivity - 0.99 10-6 ohm m 1.16 10-6 ohm m

Poisson’s ratio - - -

Magnetic permeability - - -

Machining and welding properties

Good machining and welding properties.

Failure mechanism resistance

Table 5: Failure mechanism resistance

Poor Good Excellent

- Pitting corrosion General corrosion

- - Stress Corrosion Cracking

- - Sulfide Stress Cracking

- - C02 corrosion

Product description:

Step Shaft Alloy 28 Tube Alloy 28 Pie-shaped Alloy 28 Ring Alloy 28 Module Large valves of the main Alloy 28 Other Profiled forgings Alloy 28

Special Steel classification:

Stainless steel, Hi-Steel HSLA-80, Mould steel, Heat resistant steel, Tool steel, Ball bearing steel,Spring steel, Alloy steel, Construction steel, Die steel, High-speed steel, angles, channels, H steel, I-beams, welded pipes, seamless tubes,

Standard:
Our products meet Chinese GB, Japanese JIS, US ASTM, UK BS, EU DIN standards and so on.

Our advantages:

Our advantages such as advanced management and operation concepts, suitable work facilities, highly qualified talents and a number of trade partners who have long-term and close cooperation with us have ensured us to provide global customers with competitive high-quality commodities and excellent services, quickly, accurately, conveniently and completely.

Products Introduction:

Specifications

Round bar:
Diameter : 1mm-2000mm

Square bar:
Size: 50mm * 50mm-600mm *600mm

Plate steel/flat bar:
Size: Thickness: 0.1mm-800mm Width: 10mm to 1500mm

Tube/pipe:
Size: OD: 6-219mm WT: 1-35 mm.

Cold-rolled sheet: Thickness: 2-5mm Width:1000mm Length: 2000mm

Hot-rolled sheet: Thickness:6-80mm Width: 210-610mm

Length: We can supply any length based on the customer's requirement.

Forging/hot rolling/ extrusion of steel.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement

Excellent service for all kinds of industries, with advantages of technologies, equipment and price.

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