What are 316L, 904L
and Surgical Grade Stainless Steel ?
2009-Oct-6 |
| |
| Comparison among 316L, 904L,
surgical grade stainless steels |
| |
| Composition
ranges |
| Grade |
|
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
Cu |
| 316 |
Min |
- |
- |
- |
0 |
- |
16.0 |
2.00 |
10.0 |
- |
- |
| Max |
0.08 |
2.0 |
0.75 |
0.045 |
0.03 |
18.0 |
3.00 |
14.0 |
- |
- |
| 316L |
Min |
- |
- |
- |
- |
- |
16.0 |
2.00 |
10.0 |
- |
- |
| Max |
0.03 |
2.0 |
0.75 |
0.045 |
0.03 |
18.0 |
3.00 |
14.0 |
0.10 |
- |
| 904L |
Min |
- |
- |
- |
- |
- |
19.0 |
4.0 |
23.0 |
- |
1.0 |
| Max |
0.020 |
2.00 |
1.00 |
0.045 |
0.035 |
23.0 |
5.0 |
28.0 |
- |
2.0 |
| 420 |
Min |
0.15 |
- |
- |
- |
- |
12.0 |
- |
- |
- |
- |
| Max |
- |
1.00 |
1.00 |
0.040 |
0.030 |
14.0 |
- |
- |
- |
- |
| 440A |
Min |
0.65 |
- |
- |
- |
- |
16.00 |
- |
- |
- |
- |
| Max |
0.75 |
1.00 |
1.00 |
0.040 |
0.030 |
18.00 |
0.75 |
- |
- |
- |
| 440B |
Min |
0.75 |
- |
- |
- |
- |
16.00 |
- |
- |
- |
- |
| Max |
0.95 |
1.00 |
1.00 |
0.040 |
0.030 |
18.00 |
0.75 |
- |
- |
- |
| 440C |
Min |
0.95 |
- |
- |
- |
- |
16.00 |
- |
- |
- |
- |
| Max |
1.20 |
1.00 |
1.00 |
0.040 |
0.060 |
18.00 |
0.75 |
- |
- |
- |
|
|
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| Mechanical
properties |
| |
|
|
|
Hardness |
| Grade |
Tempering
Temp. (°C) |
Tensile Strength
(MPa) min |
Yield Strength
0.2% Proof
(MPa) min |
Elongation
(% in 50mm)
min |
Rockwell B
(HR B) max
|
Brinell
(HB) max |
Impact
Charpy V
(J) |
| 316 |
- |
515 |
205 |
40 |
95 |
217 |
|
| 316L |
- |
485 |
170 |
40 |
95 |
217 |
|
| 904L |
- |
490 |
220 |
35 |
70-90 typical |
- |
|
| |
|
|
|
|
|
|
|
| 440C |
204 |
2030 |
1900 |
4 |
59 |
- |
9 |
| 260 |
1960 |
1830 |
4 |
57 |
- |
9 |
| 316 |
1860 |
1740 |
4 |
56 |
- |
9 |
| 371 |
1790 |
1660 |
4 |
56 |
- |
9 |
|
|
| |
| Typical
physical properties |
| Grade |
Density
(kg/m3) |
Elastic
Modulus
(GPa) |
Mean Co-eff of Thermal
Expansion (£gm/m/¢XC) |
Thermal
Conductivity
(W/m.K) |
Specific
Heat
0 - 100 ¢XC
(J/kg.K) |
Elec
Resistivity
(n£[.m) |
| |
|
|
0 - 100 ¢XC |
0 - 315 ¢XC |
0 - 538 ¢XC |
At 100 ¢XC |
At 500 ¢XC |
|
|
| 316 / L / H |
8000 |
193 |
15.9 |
16.2 |
17.5 |
16.3 |
21.5 |
500 |
740 |
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|
At 20 ¢XC |
At 500 ¢XC |
|
|
| 904L |
8000 |
200 |
15 |
- |
- |
13 |
- |
500 |
850 |
| |
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|
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|
|
|
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|
At 100 ¢XC |
At 500 ¢XC |
|
|
420
(annealed
condition) |
7750 |
200 |
10.3 |
10.8 |
11.7 |
24.9 |
- |
460 |
550 |
| |
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|
At 100 ¢XC |
At 500 ¢XC |
|
|
| 440A/B/C |
7650 |
200 |
10.1 |
10.3 |
11.7 |
24.2 |
- |
460 |
600 |
|
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| P. 1
, 2
, 3 |
| For more informaion, please refer to http://www.azom.com |
