Đặc điểm
Stud Bolt With A193 B7 , A194 2H PTFE Coated
- Quy cách / Size: M8 - M42
- Chiều dài / Length: L = 20 - 500 mm
- Bảo vệ ăn mòn / Surface treatments
* Đen mộc / Plain
* Xi đen / Black oxide
* Mạ kẽm điện / Electric zinc coatings
* Mạ kẽm nhúng nóng / Hot dip galvanize
* Mạ Dacro / Dacro coatings
* Mạ Fluorocarbon / Fluorocarbon plated
* Mạ Flour ethylene / Flour ethylene plated
Grades
|
B7 |
Alloy steel, AISI 4140/4142 quenched and tempered |
|
B8 |
Class 1 Stainless steel, AISI 304, carbide solution treated. |
|
B8M |
Class 1 Stainless steel, AISI 316, carbide solution treated. |
|
B8 |
Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
|
B8M |
Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
Mechanical Properties
|
Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
|---|---|---|---|---|---|
|
B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
|
2-5/8 - 4 |
115 |
95 |
16 |
50 |
|
|
4-1/8 - 7 |
100 |
75 |
18 |
50 |
|
|
B8 Class 1 |
All |
75 |
30 |
30 |
50 |
|
B8M Class 1 |
All |
75 |
30 |
30 |
50 |
|
B8 Class 2 |
Up to 3/4 |
125 |
100 |
12 |
35 |
|
7/8 - 1 |
115 |
80 |
15 |
35 |
|
|
1-1/8 - 1-1/4 |
105 |
65 |
20 |
35 |
|
|
1-3/8 - 1-1/2 |
100 |
50 |
28 |
45 |
|
|
B8M Class 2 |
Up to 3/4 |
110 |
95 |
15 |
45 |
|
7/8 - 1 |
100 |
80 |
20 |
45 |
|
|
1-1/8 - 1-1/4 |
95 |
65 |
25 |
45 |
|
|
1-3/8 - 1-1/2 |
90 |
50 |
30 |
45 |
Chemical Properties
|
Element |
B7 (AISI 4140) |
B8 (AISI 304) |
B8M (AISI 316) |
|
Carbon |
0.37 - 0.49% |
0.08% max |
0.08% max |
|
Manganese |
0.65 - 1.10% |
2.00% max |
2.00% max |
|
Phosphorus, max |
0.035% |
0.045% |
0.045% |
|
Sulfur, max |
0.040% |
0.030% |
0.030% |
|
Silicon |
0.15 - 0.35% |
1.00% max |
1.00% max |
|
Chromium |
0.75 - 1.20% |
18.0 - 20.0% |
16.0 - 18.0% |
|
Nickel |
|
8.0 - 11.0% |
10.0 - 14.0% |
|
Molybdenum |
0.15 - 0.25% |
|
2.00 - 3.00% |
Recommended Nuts and Washers
|
Bolt Grade |
Nuts |
Washers |
|---|---|---|
|
B7 |
A194 Grade 2H |
F436 |
|
B8 Class 1 |
A194 Grade 8 |
SS304 |
|
B8M Class 1 |
A194 Grade 8M |
SS316 |
|
B8 Class 2 |
A194 Grade 8 |
SS304 |
|
B8M Class 2 |
A194 Grade 8M |
SS316 |