08Yu grade steel: Characteristics, applications and advantages of cold rolled steel

08Yu is low-carbon cold-rolled structural steel that deserves to be considered the “gold standard” for complex deep drawing. Its exceptional mechanical properties and consistent chemical composition, make this steel irreplaceable for the automotive industry, construction, and the manufacturing of white goods.

What does 08Yu stand for?

Decoding the steel grade gives you a clear understanding of its properties:

• 08: the average carbon content is 0.08%. Low carbon content ensures high ductility and excellent weldability.
• Yu: the presence of aluminium as an alloying element. Aluminium binds nitrogen, preventing premature aging of steel and maintaining its ability to be drawn even after long-term storage.

Chemical composition (purity control)

The chemical purity of the alloy has a direct impact on its final properties. Excess carbon or sulfur makes steel brittle.

Mechanical properties of 08Yu steel

Mechanical properties are what enable 08Yu steel to be stamped without breaking. Its key indicators are yield strength (σ0,2), tensile strength (σB), and relative elongation (δ80).

Table of mechanical properties (according to GOST 9045-93):

Cold-rolled steel drawing categories define the metal's ability to deform during stamping and are classified into four main complexity groups based on GOST 9045. EDDQ (extra-deep drawing quality), DDQ (deep drawing quality), DQ (drawing quality) and EDDS (extra-deep drawing steel). They differ in stamping depth and ductility, determining the application of the steel.

Advantages of 08Yu steel

Professionals opt for 08Yu steel for cold stamping. Here’s why:

• No ageing effect: Thanks to aluminium alloying, the metal does not become brittle over time. This is critical if several months pass between purchasing the rolled product and its processing.
• High surface quality: The cold-rolled manufacturing process ensures a smooth surface finish (Class I-III according to GOST), enabling the application of paint or galvanic coatings without the need for extensive preliminary preparation.
• Accurate tolerances: Minimal plate thickness deviations ensure stable operation of stamping equipment.
• Excellent weldability: The steel can be welded using any type of welding without restrictions, without the need for preheating or heat treatment.

Applications

08Yu steel is used when metal needs to be shaped into complex forms without breaks or cracks:

• Automotive industry: Manufacturing of body parts (doors, roofs, hoods), side members and trim elements.
• White goods: Housings of refrigerators, washing machines, microwave ovens and gas stoves.
• Construction: Production of perforated profiles, high-precision boxes and finishing elements, as well as radiators.
• Instrumentation engineering: Housings for electronics and high-precision mechanical parts.

80Yu steel in production of heating radiators

For manufacturing contemporary heating radiators, 08Yu steel is the only viable choice. The panel stamping process involves forming intricate channels for the coolant, which places significant stress on the metal.

• Deep-drawing: Only the EDDQ (extra-deep drawing quality) or DDQ categories enable the formation of radiator relief without microcracks or wall thinning.
• Sealing: The purity of the 08Yu alloy ensures a perfect weld. This is essential, as radiators operate under constant pressure and are vulnerable to water hammer.
• Coating adhesion: The perfectly smooth 08Yu surface ensures that the powder coating adheres evenly, providing long-lasting protection against corrosion for decades.

Comparison: 08Yu vs. 08ps: Which one to pick?

A common question is whether 08Yu can be replaced with the more affordable 08ps (semi-killed). The main difference is in how the metal behaves during deformation.

Verdict: If your project doesn't require deep drawing — such as a flat panel or a simple corner — go with 08ps. If your project involves complex stamping of body parts or radiators, 08Yu is the only choice.

FAQ

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1. How does 08Yu steel differ from 08kp steel?

08kp steel, which is unkilled steel, contains many gas inclusions and has a non-uniform structure. 08Yu steel is fully killed, making it much stronger in tensile strength and less likely to become brittle over time, unlike 08kp.

2. What is the best drawing grade for the automotive industry?

For vehicle front parts like fenders and doors, grade 08Yu steel, either DDQ or EDDQ grade according to GOST 9045-93, is typically used. This helps prevent the formation of "orange peel" and microcracks during the forming process.

3. Is it necessary to heat 08Yu steel before stamping?

No, 08Yu steel is typical cold-working steel. Its ductile properties enable deep drawing at room temperature without any loss of strength.

4. Does grade 08Yu steel rust?

Yes, like any carbon steel without chromium or nickel alloys, 08Yu steel is susceptible to rust and corrosion. However, its high-quality cold-rolled surface allows protective coatings such as zinc, varnish, or enamel to be applied, ensuring maximum adhesion.

Why should I order 08Yu steel from NLMK?

NLMK guarantees that every batch of 08Yu steel complies with manufacturer's certificates.  We ensure proper storage conditions to prevent corrosion and mechanical damage to the edges.

For technical advice or a quote, please contact our Sales hotline at +7 (800) 511 30 39 or email us at sales@nlmk.com.