Is 904L steel softer?

904l steel is still steel and quite soft. if you want to resist scratches then you should try ceramic the down side to that is it breaks in strong impact. if you are worried about the softness of 904L steel, you should not even think about getting a gold watch….

Why does Rolex use 904L steel?

Since salt is generally the culprit behind rusting and pitting, Rolex decided to make the switch to 904L. The material is actually more resistant to all chemicals (not just chloride.) Switching to 904L allowed them to offer a better product that was could handle serious stress.

Is 316L stainless steel durable?

316L also is a great stainless steel for high-temperature, high-corrosion uses, which is why it’s so popular for use in construction and marine projects. And neither are as durable as 317 and 317L, which have higher molybdenum content and are better for overall corrosion resistance.

How strong is 904L steel?

Mechanical Properties

Grade Tensile Strength (MPa) min Hardness
Rockwell B (HR B)
904L 490 70-90 typical

Does Omega use 904L steel?

What grade of steel is used in modern OMEGA watches? OMEGA uses stainless steel 1.4435 or 316L. Steel 904L and 316L have the same grade of hardness.

Does Rolex use stainless steel?

Stainless steel is not all the same. Steel comes in various types and grades… and most steel watches are made from a type of stainless steel called 316L. Today, all the steel in Rolex watches is made from 904L steel, and as far as we know, pretty much no one else does.

What makes stainless steel grade 904L so good?

This high alloy stainless steel is added with copper to improve its resistance to strong reducing acids, such as sulphuric acid. The steel is also resistant to stress corrosion cracking and crevice corrosion. Grade 904L is non-magnetic, and offers excellent formability, toughness and weldability.

What kind of corrosion resistance does 904L have?

The high nickel (25%) and molybdenum (4.5%) contents of 904L provide good resistance to chloride stress corrosion cracking, general and chloride pitting corrosion resistance above the levels of 316 and 317 stainless. The copper addition provides added resistance to hot phosphoric acid and dilute sulfuric acid.

What kind of acid is alloy 904L made of?

Alloy 904L was originally developed to withstand environments containing dilute sulfuric acid. It also offers good resistance to other inorganic acids such as hot phosphoric acid as well as most organic acids. Alloy 904L is easily welded and processed by standard shop fabrication practices.

What should the annealing temperature be for 904L stainless steel?

Annealing: The recommended annealing temperatures for 904L wrought steel is 1095 °C (2000 °F). Type 304 stainless steel can handle mild foods and vegetables, but sauces and pickle liquors are more corrosive and can even cause pitting corrosion on type 316 stainless steel.