DIN1654/5-1989 Technical delivery conditions of steel and stainless steel for cold heading and cold extrusion

Cold heading and cold extrusion steels - Delivery conditions for stainless steels

1 Scope

This standard applies to unalloyed and alloyed stainless steels of the following steel numbers: 1.4301 (X5CrNi18-10), 1.4311 (X2CrNiN 18-7), 1.4541 (X6CrNiTi18-10), 1.4550 (X6CrNiNb18-10), 1.4571 (X6CrNiMoTi17-12-2), 1.4401 (X5CrNiMo17-12-2), 1.4435 (X2CrNiMo17-12-2). Standard or special steel quality for cold working according to DIN2625-1, DIN2625-2, DIN2626-1, DIN2626-2 and DIN17671, respectively.

2 Steel supply

Deliverable steels must be supplied in the delivery condition supplied. The delivery conditions are according to DIN2625-1, DIN2625-2, DIN2626-1, DIN2626-2 and DIN17671, respectively, for standard or special steels for cold working. Correspondingly, a corresponding standard product according to the respective applicable delivery condition is allowed. If a specified delivery condition is not available, it must be given in an appropriate manner.

3 Definition

3.1 Steel Grade

The steels shall be classified in accordance with the standard quality and shall be given by means of the steel number referred to in clause 1 for the following conditions:

- unalloyed or alloyed stainless steel

- delivery condition in accordance with DIN 2625-1/A, DIN 2625-2/A, DIN 2626-1/A, DIN 2626-2/A and DIN 17671/A, respectively

3.2 Delivery conditions

The delivery conditions are dependent on the steel quality according to DIN 2625-1, DIN 2625-2, DIN 2626-1, DIN 2626-2 and DIN 17671; corresponding to the following:

- Standard steels of cold working (for example, tensile strength and drawability)

- Special steels of cold working (for example, tensile strength, yield strength, elongation, drawability, surface roughness as well as other characteristics applicable to the respective standards)

3.3 Range of Supply

The range of supply for the delivery condition concerns the delivery of products and the shape of the products (for example, the height) for which the delivery conditions are applicable.

4 Requirements

4.1 Chemical composition

The chemical composition of the supplied steel must meet the requirements of the respective delivery condition.

4.2 Mechanical properties

The mechanical properties of the supplied steel must meet the requirements of the respective delivery condition.

4.3 Standard tolerances

The standard tolerances for the cold deformation of the supplied steel must comply with the applicable delivery condition.

4.4 Delivery of products

The products must be produced, subjected to the agreed tests and marked in accordance with the applicable delivery conditions.

5 Marking

During delivery, the manufacturer must comply with the applicable marking regulations.

6 Material Test Certificate

Material test certificates must be issued in accordance with the applicable delivery condition.

7 Tests

In accordance with the respective delivery condition, tests must be carried out on the supplied steel before being delivered.

8 Formal verification

The manufacturer must carry out sample tests in accordance with the applicable delivery condition.

9 Document Delivery

The manufacturer must deliver the appropriate documents in accordance with the applicable delivery condition.

10 Compliance

The manufacturer is not permitted to exceed the limits of the applicable delivery condition.

Cold heading and cold extrusion steel produces components with a variety of cross-sectional shapes and sizes, ranging from small-section pins to large-section lugs. This product is widely used in modern industrial and mechanical products. Due to its special properties, stainless steel is widely used in the production of cold-heading and cold-extrusion parts.

The DIN 1654/5-1989 standard stipulates the technical requirements for stainless steel used in cold heading and cold extrusion. This standard specifies the requirements, test methods and inspection rules for stainless steel grades 1.4521, 1.4541, 1.4550 and 1.4527, which are commonly used for cold heading and cold extrusion.

The scope of the DIN1654/5-1989 standard includes requirements and test methods for the chemical composition, mechanical properties, surface quality and delivery in terms of steel and steel products, such as steel strips, wire rods, and wire.

In terms of chemical composition and mechanical properties, the delivery status of the steel must meet the requirements of the standard.

Regarding the surface quality, the standard requirements are: no sharp edges; no rust, scale, oxide cold-welded parts, cracking, corrosion and pitting; no bumps, bends, bumps, bulges and slags; the appearance must be clean and tidy; no electroplating, quenching and dismantling.

In addition, the standard sets out the requirements and methods for packaging, marking and inspection documents, and outlines the inspection conditions, sampling and guidance form.

To conclude, the DIN1654/5-1989 standard provides detailed requirements for stainless steel in terms of chemical composition, mechanical properties, surface quality and delivery. It is of great help to the quality control of cold heading and cold extrusion products.