What is BS EN 10250‑4 about?
BS EN 10250‑4 is the fourth part of the EN 10250 multi-series. BS EN 10250‑4 specifies the technical delivery requirements for open die forgings, forged bars and products pre-forged and finished in ring rolling mills, manufactured from stainless steels with ferritic, martensitic, austenitic and austenitic-ferritic structures.
NOTE: The majority of steels listed in this part of EN 10250 are identical to steels specified EN 10088-3 and EN 10028-7, and more extensive information on properties is given in these European Standards.
Who is BS EN 10250‑4 for?
BS EN 10250‑4 on steel forgings is relevant to:
- Steel casting and forging foundrys
- Mechanical engineers
- Civil engineers
- Design engineers
Why should you use BS EN 10250‑4?
Besides shaping the metal, open die forging of steel is vital in increasing strength and reducing porosity, thereby improving performance and functionality.
BS EN 10250‑4 provides information on chemical composition, cast analysis, product analysis, heat treatment, mechanical properties, varied temperature properties, required to conduct open die steel forging.
BS EN 10250-4 covers steel grades and their respective minimum and maximum levels of chemical composition of silicon, manganese, phosphorus and sulfur, amongst others.
BS EN 10250-4 provides guidelines on the temperatures for hot forming and heat treatment.
The information provided by BS EN 10250‑4 guides you with standardized open die steel forgings process with accuracy and precision based on the specific need of the application.
What’s changed since the last update?
BS EN 10250‑4:2021 supersedes BS EN 10250‑4:2000, which is withdrawn
In comparison with the previous edition, the following technical modifications have been made:
- Updation in Scope and Terms and definitions
- Removal of EN 10021 and EN 10088-3 from the Normative references
- Restructuration of Chemical composition
- Introduction of three steel grades in Steel grades and chemical composition Table: x1crni25-21, x1crnisi18–15–4 and x2crnimnmon25–18–6-5
- Alignment of silicon characteristics with EN 10088-3 in Table 4 on Permissible deviations
- Addition of 2 columns on resistance to intergranular corrosion in Tables 6 and 7 on Mechanical properties