1985ч aluminum alloy, also commonly written as 1985ch aluminum alloy, is an Al-Mg-Zn series wrought aluminum alloy in the Russian standard system, mainly used for ships, aviation, and related structural components.
1985ч aluminum alloy standards and specifications
1985ч aluminum alloy products supplied by Chalco are strictly verified, production-controlled, and quality-delivered according to relevant GOST / OST standards. Common applicable standards are as follows:
- GOST R 56371-2015: 1985ч aluminum sheet / plate
- GOST R 56370-2015: 1985ч aluminum thick plate
- OST 1 92063-78: 1985ч aluminum strip / flat strip
- OST 1 92073-82: 1985ч aluminum strip / flat strip
- OST 1 92041-90: 1985ч panels with longitudinal ribs
1985ч aluminum alloy available product forms
Chalco can supply various 1985ч aluminum products according to customer project requirements. The following are common supply forms and reference sizes. Actual specifications should be confirmed based on temper, quantity, drawings, and production feasibility.
1985ч aluminum plate / sheet
1985чAT aluminum plate is commonly used for ship structural plates, reinforcement plates, and lightweight structural components.
Common thickness 4.0–10.0 mm; width 1200 / 1500 mm; length 3000–7000 mm.
1985ч aluminum thick plate
1985чT / 1985чAT thick plate is suitable for ship structural components, support parts, and engineering parts.
Common thickness 12–35 mm; width 1200 / 1500 mm; length 2000–7000 mm. Reference specification 20 × 1500 × 4000 mm.
1985ч aluminum alloy chemical composition
The chemical composition of 1985ч aluminum alloy is usually confirmed according to OST 5.9466-88, as follows:
| Element | Content (%) |
| Al (Aluminum) | 89.67–92.22 |
| Mg (Magnesium) | 5.0–5.9 |
| Zn (Zinc) | 2.2–2.8 |
| Mn (Manganese) | 0.25–0.50 |
| Cr (Chromium) | 0.10–0.20 |
| Zr (Zirconium) | 0.08–0.20 |
| Be (Beryllium) | 0.0002–0.005 |
| Fe (Iron) | ≤0.30 |
| Si (Silicon) | ≤0.20 |
| Cu (Copper) | ≤0.10 |
| Ti (Titanium) | ≤0.07 |
| Other impurities, each | ≤0.05 |
| Other impurities, total | ≤0.10 |
Role of main alloying elements in 1985ч aluminum alloy
1985ч is a heat-treatable Al-Mg-Zn aluminum alloy. Its strength, corrosion resistance, and structural stability mainly depend on Mg, Zn, Mn, Cr, Zr, and trace Be.
Mg and Zn: improve strength
Mg and Zn are the main strengthening elements. Through quenching and aging, Mg-Zn strengthening phases precipitate and improve yield strength and structural performance.
Mn, Cr, and Zr: stabilize the structure
Mn, Cr, and Zr help inhibit recrystallization and grain growth, improving microstructural stability and stress corrosion resistance.
Be: improve casting stability
Trace Be helps reduce oxidation of high-magnesium melts during melting and casting, improving ingot and processing stability.
Cu: strictly controlled
Cu is strictly limited because it may reduce corrosion resistance in seawater environments. Low copper content is important for marine and structural applications.
Common tempers of 1985ч aluminum alloy
1985чA
1985ч aluminum alloy material with normal cladding. "A" mainly indicates the cladding layer and is not a separate heat treatment temper.
1985чAT
1985ч aluminum alloy material with normal cladding, quenched and naturally aged. Commonly used for 1985ч aluminum plates and thick plates.
1985чT
1985ч aluminum alloy material without normal cladding, quenched and naturally aged. Mainly used for 1985ч marine thick plates.
1985ч aluminum alloy mechanical properties
The mechanical properties of 1985ч aluminum alloy may vary depending on temper, heat treatment, product form, and deformation degree. Final acceptance values for plates, thick plates, tubes, and extruded profiles should be based on the applicable standard and MTC. The following are typical reference values for 1985ч aluminum alloy semi-finished products:
| Mechanical Property | Typical Value |
| Tensile Strength σb / Rm | 350–420 MPa |
| Yield Strength σT / Rp0.2 | 250–320 MPa |
| Elongation δ5 | 8–12% |
| Brinell Hardness HB | 90–110 HB |
| Impact Toughness KCU | ≥25 kJ/m² |
1985ч aluminum alloy physical properties
1985ч aluminum alloy has low density, good thermal conductivity, and stable structural adaptability. It is suitable for ships, aviation, tubes, and extruded profiles that require lightweight performance and heat dissipation.
| Physical Property | Typical Value |
| Density ρ | 2700 kg/m³ |
| Elastic Modulus E | 70,000 MPa |
| Linear Expansion Coefficient α | 23.5 × 10⁻⁶ 1/°C |
| Thermal Conductivity λ | 130–150 W/(m·K) |
| Specific Heat Capacity C | 900 J/(kg·K) |
| Electrical Resistivity R | 0.035–0.040 Ω·mm²/m |
1985ч aluminum alloy processing properties
1985ч can be used for rolling, extrusion, tube extrusion, cutting, drilling, milling, and machining according to drawings. For marine, aviation, and special industrial structural parts, customers should mainly confirm product form, temper, and acceptance standard.
- Rolling: suitable for marine aluminum sheets and thick plates. Common tempers include 1985чAT and 1985чT.
- Processing according to drawings: dimensions, tolerances, and machining allowance can be confirmed based on section drawings, product drawings, or samples.
- Heat treatment control: some acceptance values of 1985ч aluminum sheets and thick plates are related to the natural aging time after quenching. Temper and testing time should be specified in the order.
- Surface and cladding: 1985чA / 1985чAT refers to materials with normal cladding, suitable for sheet or thick plate projects requiring higher corrosion resistance.
1985ч aluminum alloy applications
Marine manufacturing
1985ч rolled products can be used for marine aluminum sheets, thick plates, panels with longitudinal ribs, and structural reinforcement plates, suitable for marine structures requiring lightweight performance, strength, and corrosion resistance.
Common applications: marine sheets and thick plates, hull structural plates, superstructure plates, reinforcement plates, ribbed panels, and repair replacement plates.
Aviation and related structures
1985ч aluminum sheets, thick plates, and strips can be used for some aviation and related industrial structural parts requiring low weight, strength, and material stability.
Common applications: aviation structural plates, reinforcement plates, skin panels, integral reinforced panels, and repair replacement plates.
Engineering plates and industrial structures
1985ч aluminum alloy products can be used for engineering structures, support plates, connection plates, machining blanks, and industrial equipment parts, suitable for cutting, drilling, milling, and processing according to drawings.
Common applications: structural plates, equipment panels, reinforcements, support plates, machining blanks, and cut-to-size plates.
1985ч aluminum alloy packaging and transportation
Packaging methods vary by product form. During export transportation, sheets, thick plates, coils, and strips should be protected from surface scratches, deformation, moisture, and batch mixing.
| Product form | Packaging focus |
| Aluminum plate / thick plate | Protective film, paper interleaving, moisture-proof packaging, wooden pallets or wooden cases |
| Custom machined parts | Drawing number marking, batch labels, part protection, packing photos |
What information should be provided for a 1985ч aluminum alloy inquiry?
To confirm production feasibility, applicable standards, size range, and quotation more accurately, customers are advised to provide the following information when sending an inquiry:
- Alloy grade
- Product form
- Applicable standard
- Dimensions and specifications
- Supply temper
- Drawings or samples
- Purchase quantity
- Application scenario
- Document requirements
- Packaging requirements
Related 1985ч aluminum alloy products
In addition to 1985ч aluminum products, Chalco can also supply various Russian standard and common wrought aluminum alloy products, helping customers compare material options based on strength, corrosion resistance, processability, and project standards.
1980 aluminum
1901 aluminum
1105 aluminum
1420 aluminum
1163 aluminum
1920 aluminum
FAQ
What is 1985ч aluminum alloy?
1985ч is a Russian Al-Mg-Zn wrought aluminum alloy commonly used for structural applications such as marine, aviation, tubes, and extruded profiles. In English purchasing documents, it is usually written as 1985ch aluminum alloy.
Are 1985ч and 1985ch the same material?
Usually yes. 1985ч is the Cyrillic spelling, while 1985ch is the Latin transliteration. Formal purchasing should follow the grade marking in drawings, standards, and material certificates.
What are common 1985ч aluminum sheet sizes?
According to GOST R 56371-2015, common 1985чAT marine aluminum sheet thickness is 4.0–10.0 mm, with widths of 1200 / 1500 mm and lengths of 3000–7000 mm. Actual sizes should be confirmed by order.
What are common 1985ч thick plate sizes?
According to GOST R 56370-2015, 1985чT / 1985чAT thick plates are 12–35 mm thick, 1200 / 1500 mm wide, and 2000–7000 mm long.
Can 1985ч aluminum alloy be used for marine applications?
Yes. GOST R 56371-2015 and GOST R 56370-2015 both include 1985ч for marine aluminum alloy sheets and thick plates. Project use should follow design documents, classification society requirements, and acceptance standards.
Does 1985ч have an ASTM or EN equivalent?
There is currently no widely recognized direct equivalent. Any substitution should be confirmed by chemical composition, mechanical properties, temper, application, and project standard.
What documents can be provided for 1985ч aluminum alloy?
Material certificates, MTC, chemical composition reports, mechanical property reports, dimensional inspection records, CoC, packing photos, and export documents can be provided as required.
Can customers inquire without complete drawings?
Yes. Customers can first provide the grade, product form, reference size, application, and sample photos. For special sizes or replacement parts for old projects, Chalco can assist with preliminary review before confirming drawings and production plans.
