Why does the page not recommend the “best quenchant” directly?

DI, size, and literature H ranges alone cannot determine distortion, cracking, surface condition, concentration life, or economics. This page reports only H-range feasibility for the 50% martensite round-bar model and does not make a comprehensive ranking without measured evidence.

What does “conditional” mean?

The upper end of the candidate H range meets the requirement but the lower end does not. Feasibility depends on the actual tank, temperature, relative motion, and load and must be measured or calibrated from workpiece results.

Do historical oil and water H ranges represent my medium?

No. Grossmann 1942 ranges are only early sensitivity references. A specific product and tank require a traceable measured or calibrated H range.

Quenchant H-RangeFeasibility Screening

Back-calculate the minimum H from steel DI and the target equivalent round-bar diameter, then check each candidate medium’s traceable H range. The page does not package literature ranges as a “best-media recommendation.”

DI + Target Round-Bar Diameter → Required H → Candidate-Range Screening

Criterion

Critical diameter for 50% martensite at the center of an infinitely long round bar

Result states

Fully meets, conditional, insufficient, or no finite solution

Data responsibility

A specific product requires its measured or calibrated H range and operating conditions

Target Inputs

Ideal Critical Diameter DI

DI must come from measured-data conversion or a composition calculation within its validity range.

Current: page example

Target Equivalent Round-Bar Diameter

The model object is an infinitely long round bar; wall thickness, plates, rings, and complex sections cannot be used directly as diameter.

Valid input. Back-calculating the minimum H.

H-Range Screening Results

Theoretical Minimum H

Target Diameter / DI

Model Limit

Waiting for calculation. Check DI and the target diameter.

Candidate H Ranges

Candidate Condition / Medium	H Lower in⁻¹	H Upper in⁻¹	Value Basis	Assessment	Predicted Dc Range	Remove

The historical oil and water ranges come from Grossmann 1942 Table 17 and are only sensitivity references. A custom row should contain a measured or workpiece-calibrated range for the same medium, concentration, temperature, relative motion, and load condition. Assessment uses minimum H as the conservative boundary and maximum H as the upper boundary.

Review H units, calculation basis, and historical ranges →

Range screening · not a comprehensive media ranking

Inverse calculation: Solve the minimum finite H from DI and target round-bar diameter using the Grossmann 50% martensite center criterion.

Range assessment: H lower bound meets = fully meets; only H upper bound meets = conditional; H upper bound is still too low = insufficient.

No unsupported inference: The page does not fabricate H values, distortion risk, or pros-and-cons rankings for Anran products, polymer concentrations, brine, or a specific tank.

Grossmann H-Value Method · Official ASTM D6200-21 standard page · Official ISO 9950:1995 standard page