Stainless steel round bars from heat-resistant steel

Stainless steel round bars from heat-resistant steel

What these heat‑resistant round bars are

Stainless steel round bars from heat‑resistant steel are solid round rods made from austenitic, high‑alloy stainless steels designed to withstand elevated temperatures and aggressive furnace atmospheres. In practice these bars are also called stainless round bars, heat‑resistant rods or heat‑resistant stainless steel bars. They combine corrosion resistance typical of stainless steels with improved stability and oxidation resistance at high temperatures.

Available grades and technical highlights

The most common heat‑resistant austenitic grades in this category we offer are:

• 1.4841 - AISI 314, DIN X15CrNiSi25‑21, PN H25N20S2. This grade is a heat‑resistant austenitic steel used for items such as the ends of glass‑blowing pipes, porcelain firing baskets and heavy conveyor parts. It is heat resistant up to approximately 1150°C, and in atmospheres containing fumes and sulphur compounds it is resistant up to about 1000°C depending on concentrations.
• 1.4842 - AISI 310S, DIN X15CrNiSi25‑20, PN H25N20S2. Characterised by good high‑temperature strength and corrosion resistance up to around 1149°C. Compared with 304 and 309 it offers superior performance in many hot environments. It shows excellent resistance to carburisation and nitriding. Chips are stringy and the alloy work‑hardens quickly; therefore constant tool maintenance and chip breakers are recommended. It resists both reducing and oxidising atmospheres, and is resistant to atmospheric and sea corrosion and certain cyanide salts.
• 1.4845 - AISI 310S (alternate designation), DIN X8CrNi25‑21, PN H23N18. A 25/20 chrome‑nickel austenitic grade with good resistance to oxidation, sulfidation and carburisation, combined with moderate creep strength and structural stability. Typical resistance in air is up to about 1100°C. In sulphur‑containing atmospheres usable temperatures range roughly from 650°C to 1050°C, depending on conditions and contaminants.

Typical applications and industries

Stainless steel heat‑resistant round bars are used wherever components must operate reliably at high temperatures or in aggressive furnace atmospheres. Typical uses include:

• Components for heat and product handling: furnace parts, heating element supports, annealing boxes, carburising boxes, flue gas equipment.
• Glass and ceramics: ends of glass‑blowing pipes, baskets and supports for firing porcelain.
• Chemical and nitric acid industry equipment exposed to high temperatures and corrosive gases.
• General engineering and heavy‑duty conveyor parts where elevated temperature stability is needed.

These bars are suitable for customers ranging from small workshops and prototyping garages (for repair or one‑off parts) to industrial manufacturers in metallurgy, heat treatment, glass, ceramics, chemical processing, automotive (exhaust components, high‑temperature fixtures), power generation and offshore or marine applications where combined heat and corrosion resistance is required.

Working, machining and heat treatment notes

Processing behaviour varies by grade but follows general patterns for high‑alloy austenitic heat‑resistant steels:

• Grade 1.4842 is processed similarly to 304 stainless steel. Its chips tend to be stringy and the material work‑hardens quickly - maintain cutting tools often and use chip breakers.
• Cold working these alloys increases strength but also introduces internal stresses; complete annealing after significant cold deformation is recommended to restore ductility and relieve stresses (this is specifically noted for 1.4842).
• Grades 1.4841 and 1.4845 offer strong resistance to oxidation, sulfidation and carburisation at elevated temperatures; maximum usable temperatures depend on the atmosphere (oxidising vs reducing) and presence of contaminants such as sodium or vanadium.

How to choose and order

When selecting stainless steel round bars from heat‑resistant steel, specify at least:

• Material grade (e.g. 1.4841 / 1.4842 / 1.4845), and corresponding designation if you prefer AISI/DIN/PN.
• Required diameter and length (round bars are normally sold in stock lengths or cut to size).
• Surface finish and straightness tolerances if critical for your application.
• Any required certifications (material certificates, heat‑treatment records) or special heat treatment/annealing.

If you are unsure which grade suits your application, contact our technical sales team with details of operating temperature, atmosphere (oxidising, reducing, presence of sulphur or salts), mechanical loads and any regulatory requirements - we will help match the correct heat‑resistant stainless rod.

Summary

Stainless steel round bars from heat‑resistant steel provide a reliable choice when you need corrosion resistance combined with high‑temperature performance. The commonly used grades 1.4841, 1.4842 and 1.4845 each offer specific balances of oxidation, sulfidation and carburisation resistance and are suitable across glass, ceramics, heat treatment, chemical and heavy engineering industries. Always state the grade, dimensions and operating environment when ordering to ensure the right material for your needs.