Short answer: Hardness measures a metal’s resistance to indentation and wear. Tool and high-carbon steels sit at the top of the scale (up to about 70 HRC), austenitic stainless is moderate, while aluminum and copper are soft and easy to form. Use this comparison to match material to wear, machining, and surface requirements.
At a Glance
How Hardness Is Measured
Hardness is most often reported as Brinell (HB), Vickers (HV), or Rockwell (HRC/HB). They all indent the surface with a ball or cone and measure resistance. Higher numbers mean greater wear resistance and springiness but usually lower machinability and formability – so hardness is a trade-off, not a pure good.
Hardness by Metal Family
The chart shows the spread. Aluminum and copper are soft (easy to form and machine). Mild and stainless steel sit in the middle. Hardened tool and spring steels reach the top, resisting abrasive wear in dies and cutting tools. Stainless grades and aluminum alloys vary widely with temper.
What Hardness Means for Your Part
Higher hardness resists scratching, galling, and wear but is harder to cut, bend, and weld, and more brittle. Soft metals form and machine easily but dent and wear. Specify hardness (or temper) from the service: wear parts hard, formed parts soft.
Choosing a Hardness Level
Match hardness to duty: annealed or soft tempers for deep drawing and bending; half-hard for springs; quench-and-tempered or through-hardened for bearings, blades, and dies. Tell HXSCO the wear and forming needs and we will suggest the right grade and temper.
Frequently Asked Questions
Hardened tool and high-carbon steels reach the top of the practical scale, about 60-70 HRC, for dies, blades, and wear parts.
Yes. Even soft austenitic stainless (around 150-200 HB) is far harder than aluminum alloys (roughly 20-120 HB).
Not always – hardness correlates with wear resistance and yield strength but not necessarily toughness; very hard metals can be brittle.
Softer metals like aluminum, copper, and free-machining brass are easiest; hardened steels are the hardest to machine.
Give the temper or hardness range (e.g. annealed, H14, T6, HRC 40-45) and the application; HXSCO will match grade and condition.
Ready to source Metal Hardness Comparison from HXSCO?
Send us the grade, form, dimensions, quantity, and any certification or test requirements. HXSCO replies with a competitive quote, lead time, and mill-test options.
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