Factors Affecting CRGO Steel Price Per Kg (India Market Factors)

In the Indian transformer core materials market, CRGO steel price per kg is not decided only by “grade name.” Pricing depends on practical technical factors such as thickness, mill certification, magnetic loss performance, length category, and the physical condition of the sheets or coils.
The following factors directly influence CRGO price per kg:

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1. Thickness (0.23 / 0.27 / 0.30 / 0.35 mm)

Thickness is one of the most important pricing parameters in India. Lower thickness materials such as 0.23 mm generally command a higher price than thicker materials like 0.30 mm or 0.35 mm, depending on application and loss requirements.

 

2. Material Length Category (Regular vs Jumbo)

Sheet length plays a major role in pricing:
500–1500 mm → Regular material
1500–2500 mm → Medium jumbo material
2500–4000 mm and above → Jumbo material

 

Jumbo length materials are typically priced higher due to better usability in core limb manufacturing and reduced joint losses.

 

3. Watermark / Water-Contact Marks on Material

Certain secondary and imported lots may carry visible water-contact marks or patchy surface areas caused by moisture exposure during storage or handling. Since water can affect coating condition and lead to rust-related marks, such watermark presence may influence buyer acceptance and the overall price range.

 

4. Holes in Secondary Sheets (Button Holes / Line Holes)

If secondary CRGO sheets have holes, pricing reduces based on hole type, location, and size, such as:

 

Button holes

 

Line holes

 

Holes present across all limbs

 

Holes only near V-notching, mitered, or diamond sections

 

Hole size also affects value — larger holes generally lead to a bigger price drop, while smaller holes may be more acceptable, because the usable cutting area and wastage during core processing depends on the hole dimensions.
These factors directly impact usability in transformer core assembly.

 

5. Gapping (V-Notch Split Materials)

If sheets are gapped (V-notch sheet cut & split into two halves), price may drop slightly because the material may not meet full limb length expectations for certain core designs.

 

6. Bends, Dents, or Handling Damage

Any bends or deformation in CRGO sheets affects stacking quality and core assembly suitability, reducing the material value.

 

7. Mixed or Uncertain Thickness Within a Lot

In some jumbo lots, if random sheets show thickness variation (example: 0.23 lot containing occasional 0.30 sheets identified by micrometer testing), pricing is impacted due to inconsistency risk.

 

8. Mill Test Grades and Certified Codes (HP75, ZDKH85D, etc.)

CRGO pricing varies based on mill-certified test grades and markings such as HP75, ZDKH85D, and other loss-based codes supplied by international mills. These certified markings indicate suitability for transformer performance and directly impact price.

 

9. Core Loss Performance and Mill Origin (1.5T / 1.7 Tesla)

CRGO pricing is strongly influenced by magnetic performance and core loss values measured at standard operating flux densities such as 1.5 Tesla and 1.7 Tesla. Materials with lower loss values at these conditions are typically priced higher due to improved transformer efficiency and performance.
CRGO price per kg also varies depending on the supplying mill and country of origin. International mill-certified materials with consistent test results and traceability generally command a premium in the Indian transformer market.

 

10. Material Form Supplied, Coils, and Documentation Requirements

CRGO price per kg also varies depending on whether the requirement is for:

 

CRGO lamination sheets (oily or dry)

 

Jumbo core material

 

CRGO coils

 

CRGO slit coils as per width requirements

 

For CRGO coils, pricing depends strongly on the material category and processing stage. Prime CRGO coils are generally priced higher due to consistent magnetic performance, lower losses, and tighter specification control, while secondary CRGO coils may be priced lower depending on condition, surface quality, and suitability for transformer core processing.

 

In secondary coil lots, pricing may also vary based on internal coil structure. Some lots may contain coil joints or split sections, which are not always clearly identifiable without unpacking and processing. Experienced buyers typically evaluate such factors carefully during procurement.

 

Additionally, coil pricing depends on the supply form:

 

Mother coils are priced differently from processed slit coils

 

Slit coils involve additional cutting, handling, and width-based considerations

 

Slit coil pricing varies based on required slit width and tolerance

 

For slit coils, price per kg can vary based on width specification. Narrow or customised slit widths require additional processing and are priced accordingly.

 

Pricing may also depend on documentation availability such as mill test certificates, traceable supply records, and applicable compliance requirements requested by transformer manufacturers and OEMs. Buyers seeking fully documented and traceable CRGO material typically confirm these requirements during enquiry.