Do you know the yield strength, factor of safety, and tensile strength for 4130 (chromoly) steel?

Answer 1

Reynolds makes a 4130 called Reynolds 525. It's a general all-purpose tube - less expensive than 853.
The 4130 is a code of the American Iron & Steel Institute and defines the approximate chemical composition of the steel.

The "41" denotes a low alloy steel containing nominally 1 percent chromium and 0.2 percent molybdenum (hence the nickname "chromoly"). The "30" denotes a carbon content of 0.30 percent. In addition, as normal constituents of plain carbon and low alloy steels, there will be around 0.2-0.5 percent silicon, 0.5-1.0 percent manganese, and well under 0.1 percent of each of a dozen or so other elements whose presence is unavoidable, in a few cases deliberate, and generally not harmful. The remaining 97-98 percent is iron (Fe).

There are many tens, perhaps hundreds, of different steels defined by that AISI 4-digit code system. The code does not specify any particular mechanical properties, only approximate chemical composition. For any particular grade (composition) (AISI number) of steel, the mechanical properties depend on what heat treatment has been applied, and what (if any) cold work has subsequently been done.

UTS: 48 - 58 Tsi, 100 - 130 Ksi,
700 - 900 MPa
4130 steel (AKA – Chromoly) - yield strength of about 75,000 psi .
FACTOR OF SAFETY: 2.7

Answer 2

Factor of safety depends entirely upon the nature of the loading. Generally, the factor of safety would be the strength of the steel divided by the in-service stress. It is up to the engineer to decide if ultimate tensile strength, yield strength, or fatigue limits are appropriate for the numerator, and it is often difficult to accurately determine the stress for the denominator, especially in cyclic or variable loading conditions.

A material does not have a "factor of safety" by itself. It is a function of the material properties, the design of the component, and the loading on the component.

Answer 3

4130 Yield Strength

Answer 4

it depends on the type of steel 0.6Fy*Ag less than or equal to 0.5FuAe Fy = steel yield stress (50 ksi these days) Ag is gross cross sectional area of member under tension Fu = steel ultimate stress (58 ksi) Ae = effect area of member under tension; depends on end conditions, holes, etc.

Answer 5

no