Service Center Edelstahl
Industriestraße 23
32139 Spenge
Telefon: 05225 / 8799 - 0
Hardness and strength test
Your advantages at a glance:
- Mobile and fast determination of tensile strength values.
- It is better to be safe than sorry - particularly where mechanical properties are concerned - so controls are essential. Determining strength values is, of course, central to the job of the fastening expert - so this should be a key criterion when purchasing your fastening products!
- Using our own testing devices and those of our welding engineer, who is laboratory manager at Bielefeld University of Applied Sciences, we are able to quickly and easily perform all strength and hardness tests.
Determining the mechanical values of a material
Hardness and strength test
These days, simple testing devices enable fast and precise determination of the hardness of a material using a range of different procedures. In many cases, however, this is not enough, as the hardness of a material is not necessarily indicative of its strength.
Hardness tests merely measure resistance against the pressure of indentation exerted by a harder test object. The toughness and mechanical resistance that a material demonstrates against plastic deformation or separation is not taken into consideration. The test strength values that are critical for our purposes are determined by means of tensile and impact tests.
As well as the strength, it is also necessary to determine the rigidity of a material, as the elasticity also plays a role, especially in the dimensioning of profiles. What is interesting is that, in the case of stainless steel, as strain hardening increases, the rigidity of the material decreases. When looking for stainless steel with high strength and rigidity values, it is essential to ensure that the material already has a high basic strength in its annealed state.
Key test values are
Hardness test:
- Brinell HB
- Rockwell HRC, HRA, HRB
- Vickers HV
Strength test:
- yield point Rp0.2 in N/mm2
- Tensile strength Rm in N/mm2
- Flexural strength A5 in %
- Impact strength J (joule)
Elasticity:
- Modulus of elasticity E general, except with restraint forces in N/mm2
- Modulus of elasticity E restraint forces in N/mm2
- shear modulus G general, except with restraint forces in N/mm2
- shear modulus G restraint forces in N/mm2