STEEL STANDARDS AND ICONS

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STEEL STANDARDS AND ICONS

Description: In order to be able to identify the steels by dividing them into certain genera and species; The use of signs such as numbers, letters is called SIGNALING.

DIN-STANDARDS

A) Symbols of unalloyed steel based on the tensile strength of the steel:
St. is brought to the head. Like St 42 - also prefixed by C%.
For example: C 45-C 35.
Also to indicate special attributes;
(f): Suitable for induction hardening. Example Cf 53.
(k): limited in sulfur and phosphorus. For example Ck 45.
(q): suitable for cold forging. Example Cq 35
B) Symbols of alloy steels
Based on low alloy steels such as Cr, CO, Mn, Ni, W = X4 Mo, V, Al, Pb = X10 C, S, P = X100 42: Percent of C 0.42 4:4 = 1 (Cr percentage).
High alloy steels are prefixed with (x) and the last digits show the percentage of alloy directly divided by any coefficient Example: X20 Cr 13 C percentage 0.20 Cr percentage 13.

SAE/AISI STANDARDS

It is among the most used systems and is based on chemical analysis.
4 or 5 digit number systems from 1 to 9 are used.
The first two digits of the system: the steel number, the last two digits represent 100 times the C value.
Example. 10 in 1040 means: Carbon steel type 40: Carbon percentage 0.40%.
To be specific, letters such as H (hardenable guarantee) are placed at the beginning.
Example. Like 1541 H.
Indicates with the letter (L) and (B) in the addition of lead or boron

TSE STANDARDS

'Religion' was taken as basis in the preparation of steel-related standards.
Therefore, TSE 111 Turkish standards are the same as DIN standards.
In the TURKISH IRON-STEEL Industry; Inspired by SAE and DIN norms, each organization (TCD-ERDEMİR-MKE-ASİL ÇELİK) has adopted its own norms and these norms have entered our industry.
MCI; SAE symbols are prefixed with C. Example D. 1040 C. ASIL CELIK like 5140; It uses the same as SAE in the 1st degree and DIN norms in the 2nd degree.
SAE 1040 – SAE 1050
Like 9SMn 36 – 16MnCr 5

DIN-STANDARDS

A string of 5 digits is used to identify the material.
The other two have no property. The first 4 digits indicate the type of steel.
The first two of these numbers are indicative. The other two have no property