GB/T 33227-2016Aluminium and aluminium alloy sheets and strips used for motor (English PDF)

3.1 Product classification

3.1.1 Designation, state, dimension and specification

The designations, supply states, dimensions and specifications of the product shall meet those specified in Table 1. Other designations, states, dimensions and specifications, if necessary, shall be determined by the supplier and the purchaser through negotiation and be indicated in the order (contract).

Table 1 Designations, supply states, dimensions and specifications of the product

Designation Supply state State of test piece Sheet specification mm Strip specification mm Typical use

Thickness Width Length Thickness Width Inside diameter Outside diameter

405,

505,

605 <=2 000 Body structural (e.g., heat shield)

Body structural (e.g., heat shield)

Body structural (e.g., headlamp cover)

Body structural (e.g., heat shield)

Body structural (e.g., valve)

Body structural (e.g., body connector)

3003 Body structural (e.g., body connector)

Skin

3004 Body structural (e.g., boxcar)

Skin

Body structural (e.g., boxcar)

Body structural (e.g., fuel tank heat shield,

B-pillar

Body structural (e.g., body connector)

5052 Body structural (e.g., pedal, heat shield, navigation border and back panel)

Skin

5754 O O Body structural (e.g., brake booster)

Cover panel (e.g., door inner panel)

5182 O O Body structural (e.g., bonnet)

Cover panel (e.g., door inner panel)

Body structural (e.g., bumper)

Cover panel (e.g., inner and outer panels of front engine cover)

Cover panel (e.g., inner and outer panels of front engine cover)

Cover panel (e.g., inner and outer panels of front engine cover)

Cover panel (e.g., inner and outer panels of front engine cover)

Cover panel (e.g., inner and outer panels of front engine cover)

Cover panel (e.g., inner and outer panels of front engine cover)

Body structural (e.g., battery box cover)

Body structural (e.g., structural support)

Cover panel (e.g., inner and outer panels of front engine cover)

Body structural (e.g., cover) a T4P state is such a state that the product is stabilized at a lower value of strength within a certain period after a solution heat treatment and a special aging treatment.

b T6B state is such a state that the sheets in the T4P state are subjected to a simulated baking treatment.

3.1.2 Surface processing methods and surface treatment methods

The product is classified into 2 types according to the surface processing methods (see Table 2) and 4 types according to the surface treatment methods (see Table 3).

Table 2 Surface processing methods

Surface processing method a Code Explanation

Rolled surface MF Product surface rolled by a roll using grinding wheel

Textured surface EDT Product surface rolled by a roll using electrical discharge texturing a Surface processing method shall be indicated in the order (or contract). If not indicated, the product shall be supplied by the rolled surface (MF).

Table 3 Surface treatment methods

Surface treatment methods a Code Explanation

Chemical cleaning b NP Product surface treated with acid or alkali liquid

Passivation b P Product surface treated with a specified pretreatment agent

Dry oiling c DO Product surface coated with specified solid grease

Wet oiling c EO Product surface coated with specified liquid grease a Surface treatment methods can be omitted, or multiple items can be selected at the same time.

b Surface treatment methods shall be indicated in the order (or contract).

c Only one of the oiling methods can be selected.

3.1.3 Service characteristics and positions

The product for cover panel is classified into 5 types (see Table 4) according to service characteristics and 2 types according to service positions (see Table 5).

Table 4 Service characteristics

Service characteristic Code Explanation

For standard sheets S For products without special requirements on the surface and property

For high-strength bake hardening sheets IBR For products with significant increase in strength after baking

For high-strength flange plates IH For products requiring better flanging property

For high-strength plates HS For products at high-strength positions

For low-strain plates RSS For 5××× products at low-strain positions

Table 5 Service positions

Service position Code Explanation

Inner panel U For products at unexposed parts of the cover panel

Outer panel E For products at exposed parts of the cover panel

3.1.4 Labeling example

The product is labeled in the order of product name, service characteristic code, service position code, standard number, designation, supply state, and dimension/specification. Below are labeling examples:

Example 1:

The sheets for structural parts in the state of O, with a designation of 5182, a thickness of 1.50 mm, a width of 1500.0 mm and a length of 3000.0 mm are labeled as follows:

Sheet GB/T 33227-5182O 1.5×1 500×3 000

Example 2:

The sheets for low-strain inner panels in the state of O, with a designation of 5182, a thickness of 1.50 mm, a width of 1500.0 mm and a length of 3000.0 mm are labeled as follows:

Sheet RSS-U GB/T 33227-5182O 1.5×1 500×3 000

Example 3:

Standard sheets, inner panels as well as the sheets in the state of T4P, with a designation of 6016, a thickness of 1.00 mm, a width of 1500.0 mm and a length of 3000.0 mm are labeled as follows:

Sheet S-U GB/T 33227-6016T4P 1.0×1 500×3 000

Example 4:

The sheets for high-strength bake hardening inner panels in the state of T4P, with a designation of 6016, a thickness of 1.00 mm, a width of 1500.0 mm and a length of 3000.0 mm are labeled as follows:

Sheet IBR-U GB/T 33227-6016T4P 1.0×1 500×3 000 […]