中文版Bolt, bolt and stud (3098.3-2000), nut (3098.15-2000), clamping screw nail (3098.16-2000)
According to related national standards production fastener suitable stainless steel material.
Only if supply and demand both sides have the agreement in addition, the chemical composition should, in the steel group stipulated in the scope, chooses by the manufacturer.
In has the situation which the intercrystalline corrosion favors, recommends carries on the experiment according to ISO3651-1 or the ISO3651-2 stipulation. Under this situation, the recommendation uses the stability mode A3 and A5, or uses the carbon amount not to surpass 0.03% A2 and a4 stainless steel.
Table 1 stainless steel category and chemical composition
|
Category |
Rank |
Chemical composition 1), % |
Note | ||||||||
|
C |
Su |
Mn |
P |
S |
Cr |
Mo |
Ni |
Cu | |||
|
Austenite |
A1 |
0.12 |
1 |
6.5 |
0.2 |
0.15-0.35 |
16-19 |
0.7 |
5-10 |
1.75-2.25 |
2), 3), 4) |
|
A2 |
0.1 |
1 |
2 |
0.05 |
0.053 |
15-20 |
- 5) |
8-19 |
4 |
7), 8) | |
|
A3 |
0.08 |
1 |
2 |
0.045 |
0.03 |
17-19 |
- 5) |
9-12 |
1 |
9) | |
|
A4 |
0.08 |
1 |
2 |
0.045 |
0.03 |
16-18.5 |
2-3 |
10-15 |
1 |
8), 10) | |
|
A5 |
0.08 |
1 |
2 |
0.045 |
0.03 |
16-18.5 |
2-3 |
10.5-14 |
1 |
9), 10) | |
|
Martensite |
C1 |
0.09-0.15 |
1 |
1 |
0.05 |
0.03 |
11.5-14 |
- |
1 |
- |
10) |
|
C3 |
0.17-0.25 |
1 |
1 |
0.04 |
0.03 |
16-18 |
- |
1.5-2.5 |
- |
| |
|
C4 |
0.08-0.15 |
1 |
1.5 |
0.06 |
0.15-0.35 |
12-14 |
0.6 |
1 |
- |
2), 10) | |
|
Ferrite |
F1 |
0.12 |
1 |
1 |
0.04 |
0.03 |
15-18 |
- 6) |
1 |
- |
11), 12) |
1) besides already indication, was a maximum value.
2) the sulfur available selenium replaces.
3) like the nickel content is lower than 8%, then the manganese smallest content must be 5%.
when 4) the nickel content is bigger than 8%, does not give the limit to the copper smallest content.
5) the molybdenum content possibly appears in manufacturer's instruction booklet, but to certain use situation, if has the essential definition molybdenum limit content, then must indicate in the order form by the user.
6) the molybdenum content possibly appears in manufacturer's instruction booklet.
7) like the chromium content is lower than 17%, then the nickel smallest content should be 12%.
8) achieves 0.03% austenite stainless steel to the greatest carbon amount, the nitrogen content is highest may achieve 0.22%.
9) to organize stably, the titanium content should ≥5×C%-0.8%, and should according to this table suitable symbol or the niobium and (or) the tantalum content should ≥10×C%-1.0%. And should symbolize suitably according to this table.
10) to large diameter product. In order to achieve the stipulation the mechanical property, in manufacturer's instruction booklet, possibly has the high carbon content, but should not surpass to the austenite steel 0. 12%.
11) the titanium content is possibly ≥5×C%-0.8%
12) the titanium content is possibly ≥10×C%-1.0%
