Each steel alloy has it's own stress curve and tolerances. The design of something made of steel and the calculation of the stresses involved has to take into account certain safety factors depending on what is being made (a bridge for transporting goods and people has a different safety factor than a frame for a table!)
800n/mm2
Steel and stainless steel tend to weigh around the same, however, stainless steel can sometimes be a bit lighter.
stainless steel
cass iron verse steel
no, steel is heavier
Allowable stress would normally refer to design using Allowable Strength Design, also known as working strength design. In this the allowable stress is usually a fraction of the yield strength and can be different for uniform tension and bending. Typically mild steel has a yield strength of about fy=250MPa with allowable stresses in Tension, 0.6fy=150MPa Bending, 0.66fy=165MPa
The maximum allowable shear stress for stainless steel 304 is typically around 50,000 psi or 345 MPa. However, actual values may vary depending on specific grades, processing, and applications. It is important to consult relevant standards and specifications for precise information.
800n/mm2
70.4 megapascle
Fy = 235Mpa Fu = 400Mpa
Milled steel is a cheap form of iron-carbon alloy that is subject to corrosion but is malleable and does not suffer from the brittleness issues of Stainless steel. Stainless steel contains additional compounds that reduces atmospheric and hydro-corrosion and increases the hardness of the steel. This makes it more expensive, less malleable and is more likely to suffer from stress fatigue and stress fractures
bending stress also depends upon the geometry of object ,as it is given by BENDING STRESS/DISTANCE FROM THE NEUTRAL AXIS = BENDING MOMENT / MOMENT OF INERTIA But to solve the problems related to object made of c-45 steel ,the maximum stress is taken as 140 mpa.
A factor of safety against yield is applied to design stress Yield Stress/ Design Stress = Factor of safety The factor of safety varies for different industries; 1.5 is used in structural steel design for buildings; 1.25 or even 1.1 for aircraft/space systems
The allowable stress for S355 steel typically depends on its application and design standards. In general, the yield strength of S355 is around 355 MPa, and the allowable stress is often taken as a fraction of this value, usually around 0.6 to 0.7 times the yield strength, depending on the safety factors applied. For structural applications, this can translate to an allowable stress of approximately 210 to 250 MPa. Always consult relevant design codes for precise calculations.
If the steel is a ductile ASTM grade the usual allowable stresses based on the applicable code would be used. For example: AISC Code for steel buildings uses a safety factor of 1.67 for tensile yield and 2.0 on tensile rupture. AASHTO uses higher safety factors for bridges. If the steel is a ductile ASTM grade the usual allowable stresses based on the applicable code would be used. For example: AISC Code for steel buildings uses a safety factor of 1.67 for tensile yield and 2.0 on tensile rupture. AASHTO uses higher safety factors for bridges.
Well, the answer lies in the question; by saying 'real' stainless steel, you are implying that there are fake metals which go under the name 'stainless steel', thus the difference is that the stainless steel in refigerators is actually stainless steel, and the fake stainless steel is not...thus your question is answered...
No, Stainless steel is not porous. Steel how ever is.