How Do You Identify Reynolds 531?

What is the lightest steel bike frame?

This Yasujiro Svelte weighs just 5.42kg, which we reckon makes it the lightest steel road bike in the world.

Yasujiro is the in-house bike brand of tubing manufacturer Tange.

This frame is constructed from the brand’s premium double-butted Ultimate tubing..

How strong is chromoly?

3AL-2.5V in its annealed condition is listed on Matweb as having an ultimate tensile strength of 89,900 psi. 4130 chromoly that has been normalized(heat treated and stress relieved) actually has a higher ultimate tensile strength(90,000 psi).

What is Reynolds steel?

Reynolds worked closely with Carpenter Speciality Alloys to develop 953. … 953 is based on a specially developed maraging steel stainless steel alloy that can achieve a tensile strength in excess of 2000 MPa (853 is around 1400 MPa), giving a good strength-to-weight ratio.

What is Reynolds 520 chromoly?

520 is the proprietary designation for a range of butted frame tubes made by Reynolds using a chromium molybdenum steel alloy similar to the AISI 4130 standard. Other manufacturers also make butted frame tubes of AISI 4130 chromium molybdenum alloy.

What is Columbus Thron tubing?

Thron is full double butted standard Chromoly (probably just renamed Cromor). 531 is a manganese-molybdenum medium carbon steel. 525 is butted Chromoly (replaced 531). Thron is better than Aelle and Gara because those tube sets were constant thickness.

What does 4130 mean?

So in long form, 4130 means an alloy steel with chromium and molybdenum that has a carbon content of 0.3%. One thing to mention about the word “alloy” is that it’s more of broad term explaining the metal material is made of two parts. For example, you might find aluminum alloy for some parts of your bike.

How do you identify Columbus tubing?

Columbus tubing may be rifled at the tube ends and at the fork end of the steerer tube on the inside of the tube. Very rarely, if the paint is very thin, you may be able to spot the Columbus bird that is stamped in the tubes near the ends, but this is most often obscured by the lugs or paint.

What is Columbus Cromor?

Columbus Cromor is a 25CrMo4 steel, seamed and cold drawn, butted to variable thicknesses using shaped mandrills. Cromor steel is produced starting from a calibrated tube which has already received two drawing processes, before being reinforced in all the possible variable thickness off ered by the range.

Which Reynolds tubing is the best?

Conclusions. For 70 years Reynolds 531 was the faithful, go-to tubing of choice for almost all quality touring bikes. Because it is less suitable than others for TIG welding its been totally replaced in a market dominated by TIG welded frames from the Far East.

What is a 531 frame?

Reynolds 531 (pronounced ‘five-three-one’) is a brand name, registered to Reynolds Technology of Birmingham in the United Kingdom, for a manganese–molybdenum, medium-carbon steel tubing that was used in many quality applications, including race car chassis, aircraft components and, most famously, bicycle frame tubing.

Is Titanium stronger than chromoly?

Well-known member. Both have their place, Titanium is 1/3 lighter than Chromoly, it is also stronger than chromoly but more flexible (less Ridgid).

What is Columbus Steel?

Columbus Tubi is a manufacturer of steel tubing used in bicycle frames, located in Settala, in the Province of Milan. The company was founded in 1919 by A.L. Colombo and was taken over by Colombo’s youngest son, Antonio, in 1977. It is now a division of Gruppo SPA, which also owns the bicycle manufacturer Cinelli.

What type of steel is used in bicycles?

American SAE 4130 steelA popular quality steel for bicycle frames is American SAE 4130 steel, better known as “chrome molybdenum,” and referred to as “chromoly” or “chrome-moly.” And, there are plenty of other impressive alloys offered by tubing suppliers such as Columbus, Reynolds, Tange and True Temper.

Is chromoly stronger than steel?

Chromoly is stronger than normal steel, weight for weight, and is commonly used to make high-end bicycle frames, roll cages for race cars, and for fuselages on small aircraft. … This means that manufacturers use less of the steel so the strength is the same, but the weight is reduced.