Datasheet of 304 stainless steel
In this article, Mirach Metallurgy Co.,Limited share the Datasheet of 304 stainless steel. The detail info of 304 stainless steel bar is as follow:
Typical compositional ranges for grade 304 stainless steels are given in table 1.
Table 1. Composition ranges for 304 grade stainless steel
|
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 are given in table 2.
Table 2. Mechanical properties of 304 grade stainless steel
|
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.
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 (mm/m/°C) |
Thermal Conductivity (W/m.K) |
Specific Heat 0-100°C (J/kg.K) |
||||
|
0-100°C |
0-315°C |
0-538°C |
0-649°C |
at 100°C |
at 500°C |
||||
|
304/L/H |
8000 |
193 |
17.2 |
17.8 |
18.4 |
18.7 |
16.2 |
21.5 |
500 |
|
Electrical Resistivity (nW.m) |
Magnetic Permeability, H = 200 Oersteds, Annealed |
Melting Range
|
|
720 |
1.02 max. |
1399-1454 (°C) |
Grade Specification Comparison
Approximate grade comparisons for 304 stainless steels are given in table 4.
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.
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. |
