# How do I convert Rockwell to Brinell?

## How do I convert Rockwell to Brinell?

The following two conversion tables come from standard ASTM A 370….Formula A – Convert HRC into HB.

Rockwell C Hardness (HRC) Brinell Hardness (HB)
From 21 to 30 HB = 5.970 * HRC + 104.7
From 31 to 40 HB = 8.570 * HRC + 27.6
From 41 to 50 HB = 11.158 * HRC – 79.6
From 51 to 60 HB = 17.515 * HRC – 401

### What is the equivalent hardness in HRC Rockwell C of a steel with Brinell hardness of 285?

Hardness comparison table

Brinell HB (10 mm Ball, 3000 kg load) Vickers HV (5 kg) Rockwell C HRC (120 degree cone 150 kg)
293 291 32
285 285 31
276 278 30
269 272 29

#### How do you convert Rockwell hardness to Vickers?

A useful conversion used extensively in applications involving H2S is that 22 HRC (Rockwell C) is equivalent to 248 HV (Vickers), which is often rounded to 250 HV.

How do you convert Rockwell hardness to tensile strength?

To convert Rockwell Hardness to Tensile Strength, use a polynomial equation developed by modeling the tested materials. The general formula is: TS = c3 * RH^3 + c2 * RH^2 + c1 * RH + c0. “RH” stands for the “Rockwell Hardness” in the formula, and “TS” represents “Tensile Strength.”

How do you find the Brinell hardness number?

Brinell hardness is determined by forcing a hardened steel or carbide ball of known diameter under a known load into a surface and measuring the diameter of the indentation with a microscope.

## How do you convert tensile strength to Brinell hardness?

y = Ax ± B, where A is the slope, and B is the intercept. In this case, x is the Brinell hardness number, and y is the ultimate tensile strength. These formulas have been developed by statistical treatment of Brinell hardness data and the respective ultimate tensile strength data, using linear regression analysis.

### How hard is HRC 30?

30 HRC is the hardness of the steel. It’s not a type of steel. That being said, 30 HRC is atrociously soft. Its edge would dull very quickly if you used it to cut anything.

#### How does Brinell hardness relate to Rockwell hardness?

Brinell hardness (HB) is generally used for the soft material, such as non-ferrous metals, steel before heat treated or after annealing. Rockwell hardness (HRC) is generally used for high hardness materials, such as the hardness after heat treatment and so on.

What is the difference between Vickers and Brinell?

Making use of a diamond indenter, the Vickers hardness test is done with less force and more accuracy than the Brinell test. Requiring an optical system and material prep, the Vickers test incurs higher costs and takes longer to complete than the Rockwell test.

How do you calculate Brinell hardness?

## What is the relation between Brinell hardness no and Rockwell hardness no?

### What is Brinell hardness tester?

These machines measure the hardness of a material by pressing a chromium-steel or tungsten-carbide ball against the smooth material surface under standard test conditions. The hardness is expressed in HBW, where the ball indenter is made of tungsten carbide.

#### What is Rockwell C hardness?

Hardness in tool steels is most commonly measured using the Rockwell C test. Hardened cold work tool steels are generally about 58/64 HRC (hardness Rockwell C), depending on the grade. Most are typically about 60/62 HRC, although some are occasionally used up to about 66 HRC.

What is Rockwell B C scale?

Several different Rockwell scales are used for various materials and hardnesses. The most common are the Rockwell B and Rockwell C scales. The Rockwell B system incorporates a 1/16 th inch diameter steel ball, with a load of 100kg for softer materials such as aluminium alloys and materials of similar hardness.

What is Rockwell C?

The Rockwell C scale is also the most precise way to report metal strength used in industrial machine knives. Measuring Rockwell hardness requires applying specific static force to a metal surface for a definite time using precise recording measuring procedures.