Details :-
| Sr. No. |
Size (in mm) |
Thickness |
Specification |
Manufacturer |
| 1 |
1000 x 2000
1220 x 2440
(4′ x 8′)
1250 x 2500
1500 x 3000 To 6000
2000 x 4000 To 6000 |
0.3 mm To 120 mm |
A – 240 |
Jindal
Sail
Shah Alloys
Imported Etc. |
| Specifications |
| Standards |
Designation |
| ASTM |
A 240 |
| ASME |
SA 240 |
|
| Composition |
| Typical compositional ranges for grade 304 stainless steels are given in table 1. |
|
|
Composition Ranges for 304 grade stainless steel Sheets & Plates
|
|
Grade
|
C
|
Mn
|
Si
|
P
|
S
|
Cr
|
Mo
|
Ni
|
N
|
| 304 |
min.
max. |
–
0.08
|
–
2.0
|
–
0.75
|
–
0.045
|
–
0.030
|
18.0
20.0
|
–
|
8.0
10.5
|
–
0.10
|
| 304L |
min.
max. |
–
0.030
|
–
2.0
|
–
0.75
|
–
0.045
|
–
0.030
|
18.0
20.0
|
–
|
8.0
12.0
|
–
0.10
|
| 304H |
min.
max. |
0.04
0.10
|
–
2.0
|
–
0.75
|
-0.045
|
–
0.030
|
18.0
20.0
|
–
|
8.0
10.5
|
–
|
|
| Mechanical Properties |
| Typical mechanical properties for grade 304 stainless steels Plates & Sheets are given in table 2. |
|
|
Mechanical properties of 304 grade stainless steel Sheets & Plates
|
|
Grade
|
Tensile Strength (MPa) min
|
Yield Strength 0.2% Proof (MPa) min
|
Elongation (% in 50mm) min
|
Hardness
|
|
Rockwell B (HR B) max
|
Brinell (HB) max
|
|
304
|
515
|
205
|
40
|
92
|
201
|
|
304L
|
485
|
170
|
40
|
92
|
201
|
|
304H
|
515
|
205
|
40
|
92
|
201
|
|
304H also has a requirement for a grain size of ASTM No 7 or coarser.
| Physical Properties |
| Typical physical properties for annealed grade 304 stainless steels are given in table 3. |
|
|
Physical properties of 304 grade stainless steel in the annealed condition
|
|
Grade
|
Density (kg/m3)
|
Elastic Modulus (GPa)
|
Mean Coefficient of Thermal Expansion (μm/m/°C)
|
Thermal Conductivity (W/m.K)
|
Specific Heat 0-100°C (J/kg.K)
|
Electrical Resistivity (nΩ.m)
|
|
0-100°C
|
0-315°C
|
0-538°C
|
at 100°C
|
at 500°C
|
|
304/L/H
|
8000
|
193
|
17.2
|
17.8
|
18.4
|
16.2
|
21.5
|
500
|
720
|
|
| Grade Specification Comparison |
| Approximate grade comparisons for 304 stainless steels are given in table 4. |
|
|
Grade specifications for 304 grade stainless steel
|
|
Grade
|
UNS No
|
Old British
|
Euronorm
|
Swedish SS
|
Japanese JIS
|
|
BS
|
En
|
No
|
Name
|
|
304
|
S30400
|
304S31
|
58E
|
1.4301
|
X5CrNi18-10
|
2332
|
SUS 304
|
|
304L
|
S30403
|
304S11
|
–
|
1.4306
|
X2CrNi19-11
|
2352
|
SUS 304L
|
|
304H
|
S30409
|
304S51
|
–
|
1.4948
|
X6CrNi18-11
|
–
|
–
|
|
|
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
|
|
|
| Possible Alternative Grades |
| Possible alternative grades to grade 304 stainless steels are given in table 5. |
|
Possible alternative grades to 304 grade stainless steel
|
| Grade |
Why it might be chosen instead of 304 |
| 301L |
A higher work hardening rate grade is required for certain roll formed or stretch formed components. |
| 302HQ |
Lower work hardening rate is needed for cold forging of screws, bolts and rivets. |
| 303 |
Higher machinability needed, and the lower corrosion resistance, formability and weldability are acceptable. |
| 316 |
Higher resistance to pitting and crevice corrosion is required, in chloride environments |
| 321 |
Better resistance to temperatures of around 600-900°C is needed…321 has higher hot strength. |
| 3CR12 |
A lower cost is required, and the reduced corrosion resistance and resulting discolouration are acceptable. |
| 430 |
A lower cost is required, and the reduced corrosion resistance and fabrication characteristics are acceptable. |
|
OTHER GRADES OF STAINLESS STEEL 304 / 304L SHEETS PLATES
| Stainless Steel 304 Sheets Plates |
| Stainless Steel 304L Sheets Plates |
| SS 304 Sheets Plates |
| SS 304L Sheets |
| Stainless Steel UNS S30400 Plates |
| SS UNS S30403 Sheets Plates |
| Stainless Steel Din 1.4306 Plates |
| SS Din 1.4307 Sheets |
|
