BS 6744 stainless steel bars for the reinforcement of and use in concrete. 2009 version is substantially the same as the 2001 edition but with the addition of 2 lean duplex steel 1.4162 and 1.4362. These steel have the benefit of having a lower nickel content than the standard austenitic grades such as 304 1.4301 and 316 1.4401. They are therefore less prone to large variations in price.
The grade designations are harmonized with the European steel number system, but currently there is no European standard for these products.
The steels included in BS 6744 can also be found in EN 10088-3. The specified composition ranges are the same, but with some differences in the number of decimal places for the percentages of some elements shown. The ranges are however shown in this article. The tensile strength properties are also included in this article, but these are not expressed in the same way as in EN 10088-3, the general standard for stainless steel bars. The strength levels for bars to BS 6744 are expressed as the 'Grade' and indicate the proof strength of the steel. Guidance on steel number selection in a range of service environments is given in Annex B of the standard.
BS 6744 chemical composition table
| Grade |
| Chemical composition (% by mass - max unless stated) |
| - |
C |
Si |
Mn |
S |
Cr |
Ni |
Mo |
P |
N |
| 1.4301 |
0.07 |
1.0 |
2.0 |
0.03 |
17.0/19.5 |
8.0/10.5 |
- |
0.045 |
0.11 |
| 1.4436 |
0.05 |
1.0 |
2.0 |
0.015 |
16.5/18.5 |
10.5/13.0 |
2.5/3.0 |
0.045 |
0.11 |
| 1.4429 |
0.03 |
1.0 |
2.0 |
0.015 |
16.5/18.5 |
11.0/14.0 |
2.5/3.0 |
0.045 |
0.12/0.22 |
| 1.4162 |
0.04 |
1.0 |
4.0/6.0 |
0.015 |
21.0/22.0 |
1.35/1.75 |
0.1/0.8 |
0.040 |
0.20/0.25 |
| 1.4362 |
0.03 |
1.0 |
2.0 |
0.015 |
22.0/24.0 |
3.5/5.5 |
0.1/0.6 |
0.035 |
0.05/0.20 |
| 1.4462 |
0.03 |
1.0 |
2.0 |
0.015 |
21.0/23.0 |
4.5/6.5 |
2.5/3.5 |
0.035 |
0.10/0.22 |
| 1.4501 |
0.03 |
1.0 |
1.0 |
0.015 |
24.0/26.0 |
6.0/8.0 |
3.0/4.0 |
0.035 |
0.20/0.30 |
| 1.4529 |
0.02 |
0.50 |
1.0 |
0.010 |
19.0/21/0 |
24.0/26.0 |
6.0/7.0 |
0.030 |
0.15/0.25 |
Note
Nitrogen contents of grades 1.4301 and 1.4436 may be increased to 0.22% max
BS 6744 tensile property table
| Grade |
| Tensile Properties (min unless stated) |
| - |
0.2% Proof strength, Rp0.2 |
Stress Ratio, Rm/Rp0.2 |
Elongation at fracture, A5 |
Total elongation at maximum force, Agt |
| |
| 200 |
200 |
1.10 |
22 |
5 |
| 500 |
500 |
1.10 |
14 |
5 |
| 650 |
650 |
1.10 |
14 |
5 |
Note
Proof strength and stress ratio units are MPa (N/mm2)
Elongation values are percentages (%) (Elongation is A5, total is Agt)
U bend Stainless Steel Tube for Heat Exchanger
Heat Exchanger Tube
Specification/Standards for Heat Exchanger Tubes
Finned Tube and Pipe Heat Exchangers
Shell Tube and Pipe Heat Exchangers
Select Materials for Heat Exchanger Tubes with Substantial Pressure difference
The difference between Stainless Steel Tubing and Cooper Tubing in Shell and Tube Heat Exchanger
Flow arrangement
Heat exchanger Types:
U Tube Heat Exchanger
Shell and tube heat exchanger
Plate heat exchanger
Regenerative heat exchanger
Adiabatic wheel heat exchanger
Plate fin heat exchanger
Fluid heat exchangers
Phase-change heat exchanger
Parallel Flow Heat Exchanger
Counter Flow Heat Exchanger
Cross Flow Heat Exchanger
Spiral heat exchangers
Shell and Coil Heat Exchangers
Brazed Heat Exchangers-Advantages Applications Specifications
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