Ni-Hard Wearback Pipes

Ni-Hard Wearback Pipes

Ni-Hard Wearback Pipes are engineered for exceptional durability, specifically designed to withstand abrasive materials such as sand, cement, quarry dust, granite dust, sinter dust, slag, coal, and more.

Offering superior wear resistance, these pipes minimize wear on pipe bends compared to conventional materials.

Our range includes standard and special radius plain bends, available with or without replaceable wear-back plates. Featuring standard flanged ends, Ni-Hard Wearback Pipes ensure efficient conveying of abrasive materials. Custom designs can be tailored to meet specific requirements.

Ni-Hard is a generic name for white cast iron, alloyed with Ni, Cr, Mo, and having extremely high strength, abrasion, corrosion resistance, fracture resistance, and toughness. The alloy is best suited to applications in mining, minerals and the iron processing industries.


  • Heavy duty castings maximise operating life
  • 90° and 45° bend configurations
  • Replaceable wearback design has wear-resistant rubber gasket as standard
  • Flange faces machined in-house for repeatable quality control




Ni-Hard Wearback Pipes find widespread application in scenarios involving abrasive materials such as sand, cement, ores, and more. Whether in mining, construction, or industrial conveying, these pipes showcase versatility and applicability, offering reliable solutions for various applications.

Ni-Hard pipeis used for abrasion resistant applications where there is extreme temperature. It is used for handling coal fly ash in thermal power plant. Our Ni-hard pipe offers excellent abrasion resistant propertiesin extreme high temperature environment.High content of nickel in our Ni-hard pipe promotes austenite grain formation which causes these pipes to become abrasion and heat resistant.

We manufacture Ni-hard pipein various size and dimension. Weight of each Ni-hard pipe manufactured by us can range from25 kgs. to upto 500 kgs. single piece. We accept large quantity order for Ni-hardpipes. Ni-hard pipe is manufactured as per IS : 4771 – 1985 type 1A to upto type 3

We can design and produce according to customer drawings.

Ni-hard pipe drawing

Paint & Packing

Ni-hard pipe paint


Ni-hard pipe packing


Ni-hard pipe paint


Internal fixed steel pipe

Internal fixed

Careful grinding

Careful grinding

Hardness testing

Hardness testing

PMI testing

PMI testing

Ni-Hard Wear Plate

Ni-hard wear liners

Ni-hard wear liners

NiHard is a well-established white iron product alloyed with nickel and chromium to provide significant abrasion and impact resistance.

Our NiHard products include billets and liner plates, which can be customized to customers' specifications or supplied from our range of stock sizes. We can tailor NiHard products to meet any situation, regardless of size and shape concerns. Additionally, we offer cut and shaped liners for strategic placement on fixed plant equipment, enabling the creation of a unique wear package that maximizes wear life. NiHard is ideal for chutes, drop boxes, bins, and hopper liners.

Ni-Hard wear plates are suitable for a variety of demanding applications where abrasion resistance and resistance to heavy surface pressure are crucial. These applications include chute liners, mill liners, hoppers, and deflector plates.

Ni-Hard is a white cast iron product alloyed with nickel and chromium to produce hard chromium carbides within a martensitic matrix. This structure makes Ni-Hard suitable for products operating in high-abrasive and high-impact conditions.

We primarily supply cast billets and liner plates produced to NiHard 4 specifications. However, we can produce billets and liner plates from the following alloys upon special request:

  • NiHard 1 & 2
  • 27 Chrome Alloy
  • 15/3 White Iron


  1. Other sizes can be made upon request.
  2. Liners can be cut to size upon request.
  3. Bolts/Nuts/Washers are available upon request.
  4. Holes are sized to suit M20 fishtail bolts.
Nihard Wear Parts
Ni-hard plate
Ni-hard plate

Nihard wear billets

Ni-hard plate Ni-hard plate

Ni-hard Cast Iron Wear Plates

Ni-hard Cast Iron Wear Plates
Ni-hard Cast Iron Wear Plates
Ni-hard Cast Iron Wear Plates
  • Hardness: HRC52~58
  • This series of castings meet international standards: AS 2027-2002
  • Metallographic Structure: Eutectic Carbide + Martensite + Retained Austenite
  • Density: 7.3~7.5g/mm2
  • Strength of Extension: 25~40kg/mm2
Ni-Hard elbow

Ni-hard elbow

Ni-Hard Bends and Fittings

We specialize in manufacturing Ash Bends, which are specially coated with Ni-Hard. Ni-Hard is a metal with chrome content of 1.4% to 28%. It is an abrasive iron for low and high stress abrasion in Mining, Milling, and Earth Handling uses. Ni-hard is best in preventing abrasion in bends. Our range of Ni-Hard Ash Bends has shown excellent performances and has good wear & tear.

  • Straight pipes
  • Bends
  • Y Pieces
  • Tee’s
  • Laterals
  • Deflectors

To cope with a whole list of abrasive materials including sand, cement, quarry dust, granite dust, sinter dust, slag, coal and many others which cause extra wear on pipe bends of conventional material, we provide a range of Ni-Hard castings. Standard and special radius plain bends with and without replaceable wear-back plates are available. Flanged ends as standard, although special designs can be considered. Ni-Hard bends are essential for the efficient conveying of abrasive materials.

Ni-Hard elbow


Ni-Hard Pipe

Ni-Hard Pipe

The Differences Between Ni-Hard and Chrome White Iron

Ni-Hard and Chrome White Iron are both commonly used materials in applications requiring high wear resistance, but they have several key differences:


High Chrome White Iron

Specification: ASTM A532 Class I Specification: ASTM A532 Class II and III
Microstructure: Cementitic iron that solidifies as austenite with Fe3C carbides Microstructure: Solidifies through the eutectic point, forming an iron-rich metallic phase (that is mostly martensite) along with M7C3 chromium carbides
Ni-hard Type A is the least expensive of the Ni-hard alloys, and the most common. It is usually specified for use when combating abrasion only. When impact is an issue, it is better to select a high chrome white iron. Class II alloys are considered to have the highest toughness of the chrome white iron alloys.
Ni-hard Type B can replace Type A if more toughness is required. Again, the chrome white iron class II alloys will have a higher toughness than Ni-hard A, B or D. Plus, the high chrome white iron will be more corrosion resistant.
Ni-hard Type D is the toughest of the Ni-hard grades, as well as the most corrosion resistant. It is, however, also the most expensive. The high chrome white iron class III alloys have the highest level of chromium.They are the most corrosion resistant of the ASTM A532 alloys. Their toughness is slightly less than the class II alloys, but higher than the Ni-hard alloys.
Type A is for low cost parts that are not exposed to high dynamic stresses:
  • brick molds
  • concrete/asphalt mixing wheels, blades, nozzles and augers
Type B is for parts subjected to more impact like crusher plates. Type D is for parts subjected to more severe conditions, like pump casings for corrosive slurries.
Class II is for parts subjected to a high level of impact:
  • balls for cement mills
  • parts for hard-rock mining like feed chute liners and gyratory crusher liners
Class III is the workhorse of the chrome white iron alloys and is used for parts in many industries. Applications include:
  • slurry pump parts
  • mill liners
  • cyclone parts
  • chute liners
  • crushing machines
  • piping components
If you want to see more images of chrome white iron parts, check out our Gallery

Ni-hard is also called ASTM A532 Class I Type A. This blog explores the differences between Ni-hard and ASTM A532 Class II and III in an easy-to-read chart form. Microstructure differences will be examined and application suggestions made.

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Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

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【H】 ASTM A213 T91 Alloy Tube

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Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes