Transmission Irons
Transmission iron is a special product in the iron and steel industry. If we look at the answer to the question of what is a transmission iron in a general framework, we can say that it is cold drawn, round section and 1008 SAE or EN S235Jr quality steels. When we look at their features, we see how reasonable they are for various procedures. For example, let’s talk about its compliance with the welding procedure, which is an important feature. Having a low carbon value, it becomes very suitable for welding application thanks to these features. On the other hand, they are also suitable materials for machining. They can be easily processed on both CNC and Lathes, providing ease of use and efficiency. Steels that are formed by molding at room temperature are called transmission steel or cold drawn steel. With the cold drawing process, it is aimed to increase the yield strength and tensile strength of the material without the need for heat treatment.
-Products have low carbon values. Thanks to these features, their welding capabilities are quite high.
One of the most important features is that they are economical compared to other types of steel.
-The fact that operations or assembly can be done easily with transmission shafts makes the shaft preferred in different sectors.
-It is preferred for the operations to be carried out since the hardness of chip removal is not experienced during the use of the transmission shafts.
-The high surface quality of the shafts and a smooth shaping are also features that increase its preferability.
-One of the most important features of the choice of transmission shafts is their mechanical properties. These properties are easy shrinkage, hardness, impact, shrinkage and elongation.
– Our transmission shafts shrink easily and are extremely resistant to external impacts. They are also resistant to conditions such as shrinkage or elongation. It can ensure that transactions are carried out without breaking in pulling situations.
-The heat holding capacities and expansion coefficients of our shafts are also high.
Usage areas
If we talk briefly about the usage areas, we can list them as follows; It is used in special areas such as construction, automotive, machinery production, white goods sector and the same, as well as many fields, such as the defense industry. While the usage areas of transmission steels can be listed in this way, it is not possible to list the products they are used in. Countless products contain transmission iron.
Produced by cold drawing technique, it is subjected to a second process to be brought into different shapes such as round, square or hexagonal. We can easily call this process “tightening”. If the customer has expectations such as meticulous tolerance and high surface quality, this cold drawing technique we mentioned will give the best results. In short, the product obtained by cold drawing technique is made to have a precise measurement tolerance, has superior surface quality, increases in both yield and tensile stress of the product, and increases in hardness while decreasing its continuity. Ultimately, a transmission iron is encountered as a product with superior properties.
Their quality
S235JR 5437 QUALITY MECHANICAL PROPERTIES
|
Mechanical Properties
|
|
|
Standard Equivalent
|
ERDEMİR
Quality No
|
Re (min) N/mm2 ( kg/mm2 ) d(thickness, mm)
|
Rm(1)
N/mm2 ( kg/mm2 ) d(thickness, mm)
|
A (%) min.
d(thickness, mm)
|
Darbe (3) (Longitudinally)
|
|
A80
|
A5
|
|
<16
|
>16
<40
|
>40
<63
|
>63
<80
|
>80
<100
|
<3
|
>3
<100
|
>1
<1.5
|
>1.5
<2
|
>2
<2.5
|
>2.5
<3
|
>3
<40
|
>40
<63
|
>63
<100
|
Sıc.
°C
|
KVc
J(min.)
|
|
Standard
|
Quality’81
|
|
EN 10025-2
|
S235JR+AR CTB
|
5437
|
235 (24.0)
|
225 (23.0)
|
215
(21.9)
|
215 (21.9)
|
215
(21.9)
|
360-510 (36.7-52.0)
|
360-510 (36.7-52.0)
|
16
|
17
|
18
|
19
|
24
|
23
|
22
|
+20
|
272)
|
S275JR 3244 CHEMICAL COMPOSITION Standard: EN 10025-2:2019
|
Chemical Composition (%)
|
|
Standard Equivalent
|
ERDEMİR
|
C d(thickness, mm)
|
Mn
|
P
|
S
|
Si
|
Cu
|
N(1)
|
|
CE(IIW) (4) max. (%)
|
|
|
|
Quality No
|
<16
|
16<d<40
|
40<d<100
|
|
|
|
|
|
|
|
d (mm)
|
|
|
Standard
|
Quality
|
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
<30
|
30<d<40
|
40<d<100
|
|
EN 10025-2
|
S275JR+AR
|
3244(1)
|
0.21
|
0.21
|
0.22
|
1.50
|
0.035
|
0.035
|
–
|
0.55
|
0.012
|
0.40
|
0.40
|
0.42
|
For S275 and S355 grades, max. Carbon equivalent (CEV) can be increased by 0.02% for %Si ≤ 0.04 and 0.01% for %Si ≤ 0.25.
S355JR 3252 CHEMICAL COMPOSITION Standard: EN 10025-2:2019
|
Chemical Composition (%)
|
|
Standard Equivalent
|
ERDEMİR
|
C d(thickness, mm)
|
Mn
|
P
|
S
|
Si
|
Cu
|
N(1)
|
|
CE(IIW) (4) max. (%)
|
|
|
|
Quality No
|
<16
|
16<d<40
|
40<d<100
|
|
|
|
|
|
|
|
d (mm)
|
|
|
Standard
|
Quality
|
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
<30
|
30<d<40
|
40<d<100
|
|
EN 10025-2
|
S355JR+AR
|
3252(1)
|
0.24
|
0.24
|
0.24
|
1.60
|
0.035
|
0.035
|
0.55
|
0.55
|
0.012
|
0.45
|
0.47
|
0.47
|
For S275 and S355 grades, max. Carbon equivalent (CEV) can be increased by 0.02% for %Si ≤ 0.04 and 0.01% for %Si ≤ 0.25.
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