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At Castrol, we know how sophisticated the heat treatment industry is today and we have invested in the latest technology to ensure that our products are at the leading edge of mineral oil and polymer based quenchants.
To meet the increasing demands placed on the heat treatment industry, to harden ‘leaner’ steels, achieve higher core hardness, reduce distortion to a minimum and to maintain bright-as-quenched finishes, Castrol has developed a new generation of quenchants capable of meeting these demands.
Castrol’s policy of developing working partnerships with our customer has enabled us to have a better understanding of the customers’ requirements and to develop products that meet their needs.
Benefits from Castrol’s expertise and leading technology:
- Castrol has a comprehensive product range
- Castrol provides quality after-sales service
- Castrol provides a consultancy service
- Castrol invests in the latest testing equipment
- Use of the Castrol Index
The Castrol Index
The Castrol Index was the result of co-operation between Castrol France and Renault France to develop as a method of evaluating a mineral oil based quenchant without the need for Severity of Quench test equipment.
The Castrol Index uses data from a standard ISO 9950 cooling curve to evaluate the quenchant.
The Castrol Index calculation is based on the following data:
K’ = Equipment constant
VMAX = Maximum cooling rate
TMAX = Temperature corresponding to the maximum cooling rate
There is excellent correlation between obtained as-quenched hardness and the Castrol Index.
Worked Example
The Castrol Index is an internationally accepted method for evaluating a mineral oil quenchant.
Take the situation where VMAX = 106°C/s, TMAX = 618°C, TBATH = 80°C and K’ = 103.86, then:
The following data was gathered using an IVF Quenchotest apparatus and Iloquench 395 as the quenchant.
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Figure 1. Test data for Iloquench 395 where VMAX = 106°C/s, TMAX = 618°C, TBATH = 80°C and K’ = 103.86
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Castrol Product Range (Asia Pacific)
The following table represents a small portion of the quenchants offered by Castrol.
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Iloquench 1
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Cold Quench
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Low Severity
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Iloquench 32
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Cold Quench
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Medium Severity
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Iloquench 393
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Cold Quench
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High Severity
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Iloquench 395
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Cold Quench
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Very High Severity
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Iloquench 700 Aqua
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Polymer
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Induction Hardening
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