|
Alloy Property |
£¨GA£©330 |
£¨GB£©310 |
£¨GC£©304 |
£¨GD£©446 |
£¨GE£©430 |
NAs430A |
|
Melting point ¡æ |
1400~1425¡æ |
1400~1450¡æ |
1400~1425¡æ |
1425~1510¡æ |
1425~1510¡æ |
1500-1580¡æ |
|
876¡æ Elastic modulus (104 Mpa) |
13.4 |
12.4 |
12.4 |
9.56 |
8.27 |
8.82 |
|
870¡æ Tensile strength (Mpa) |
193 |
152 |
124 |
52.7 |
46.9 |
58 |
|
870¡æ Linear expansion coefficient (10-6/¡æ) |
17.64 |
18.58 |
20.16 |
13.14 |
13.68 |
5.75 |
|
500¡æ Heat Conduction |
21.6 |
18.7 |
21.5 |
24.4 |
26.3 |
28.6 |
|
Specific Gravity under room temperature (g/cm³) |
8 |
8 |
8 |
7.5 |
7.8 |
7.8 |
|
Weight loss after 1000h of Circulation oxidation under 928 ¡æ (%£© |
18 |
13 |
70(100Сʱ) |
4 |
70(100Сʱ) |
0.5 |
|
Concentration in the air-Circulation state |
1035 |
1035 |
870 |
1175 |
870 |
1476 |
|
Gasification temperature (¡æ)-Continuous state |
1150 |
1150 |
925 |
1095 |
815 |
1149 |
|
Corrosion rate in H2S (mil/yr) |
/ |
100 |
200 |
100 |
200 |
/ |
|
Highest using temp. in SO2 (¡æ) |
/ |
1050 |
800 |
1025 |
800 |
/ |
|
Corrosion rate in natural gas under 815 ¡æ (mil/yr) |
? / |
3 |
/ |
4 |
12 |
/ |
|
Corrosion rate in Coke oven gas under 982 ¡æ (mil/yr) |
75 |
25 |
225 |
14 |
236 |
6 |
|
Nitriding rate in Anhydrous ammonia under 525¡æ(mil/yr) |
20 |
55 |
80 |
175 |
£¼GC £¾GD |
110 |
|
Corrosion rate in H2 under 454 ¡æ (mil/yr) |
/ |
2.3 |
48 |
8.7 |
21.9 |
/ |
|
982¡æ, 25h,40 cycles, alloy adding carbon after Solid carbide (%) |
0.08 |
0.02 |
1.4 |
0.07 |
1.03 |
/ |
|
NAS430A is latest stainless steel in Japan. Almina content and melting point are both high. It is superior than other steel because of the protection of Al2O3 membrane. |
|
Main advantages: Small heat shrinkable ratio, tiny distortion under rapid-cooling or rapid-heating environment, which is 2-3 times of that of other steel fiber. Its wear resistance (hardness) is over 1.5 times than that of other steel fiber. Acidification resistance and oxidative stability in high temperature: implemented for 500 cycles in repeated Oxidation test (1000 ¡æ * 30 minutes heating, cooling for 10 minutes), the oxidation is just 0.5 mg/cm2. This means it has very strong oxidation resistance, which is 3-6 times of that of other fiber. |
|
¡¡ |
¡¡ |
¡¡ |
¡¡ |
¡¡ |
¡¡ |
¡¡ |
|
Brand |
Chemical compostion % |
|
C |
P |
Mn |
Si |
Cr |
Ni |
|
330 |
¡Ü0.20 |
¡Ü0.04 |
¡Ü2.0 |
¡Ü0.75 |
17¡ª20 |
34¡ª37 |
|
310 |
¡Ü0.20 |
¡Ü0.04 |
¡Ü2.0 |
¡Ü1.50 |
24¡ª26 |
19¡ª22 |
|
304 |
¡Ü0.20 |
¡Ü0.04 |
¡Ü2.0 |
¡Ü2.00 |
18¡ª20 |
8¡ª11 |
|
446 |
¡Ü0.20 |
¡Ü0.04 |
¡Ü1.5 |
¡Ü2.00 |
23¡ª27 |
¡ª |
|
430 |
¡Ü0.20 |
¡Ü0.03 |
¡Ü1.0 |
¡Ü2.00 |
16¡ª18 |
¡ª |
|
NAS430A |
¡Ü0.20 |
¡Ü0.03 |
¡Ü0.50 |
¡Ü0.50 |
16-18 |
¡ª |
|
¡¡ |
¡¡ |
¡¡ |
¡¡ |
¡¡ |
¡¡ |
¡¡ |
|
Name |
Steel fiber Size (mm) |
Allowable deviation (%) |
|
Length (h) |
20 |
25 |
30 |
35 |
¡À15 |
|
Width(B) |
0.5£1 |
0.5-1 |
0.5-1 |
0.5-1 |
+8, -5 |
|
Thickness (H) |
0.2-0.75 |
0.2-0.75 |
0.2-0.75 |
0.2-0.75 |
¡À0.1 |
