Hardness testing to ISO 6508-1
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Stainless Steel A193 Grade B8 is a specific type of stainless steel alloy that is commonly used for stud bolts and other stud bolts. It has several features, applications, and notable corrosion resistance properties:
Features of Stainless Steel A193 Grade B8:
Stainless Steel Composition: A193 Grade B8 is typically made from Type 304 stainless steel, which contains 18-20% chromium and 8-10.5% nickel. This composition gives it excellent corrosion resistance properties.
Corrosion Resistance: One of the primary features of A193 Grade B8 is its exceptional resistance to corrosion. It is highly resistant to both atmospheric and chemical corrosion, making it suitable for use in various environments.
High Strength: A193 Grade B8 has good mechanical properties and high tensile strength, making it suitable for applications where high-strength fasteners are required.
Applications of Stainless Steel A193 Grade B8 Stud Bolts: Stainless Steel A193 Grade B8 stud bolts are widely used in various industries and applications, including:
Petrochemical and Chemical Industries: These stud bolts are commonly used in equipment and pipelines in the petrochemical and chemical industries due to their corrosion resistance and strength.
Food Processing: Stainless Steel A193 Grade B8 is often used in food processing equipment and machinery where hygiene and corrosion resistance are essential.
Power Generation: In power plants, these stud bolts are used in critical components such as turbines, boilers, and heat exchangers due to their ability to withstand high temperatures and corrosive environments.
Marine Applications: Stainless Steel A193 Grade B8 is suitable for marine applications because of its resistance to saltwater corrosion.
Construction: These stud bolts can be used in construction projects where corrosion resistance and strength are required.
Specifications | ASTM A193 / ASME SA193 |
Size | M02 to M160 |
Length | 3 to 200 mm |
Dimensions | DIN 975/976, ASME B18.2.1, B18.31.3, B16.5 |
DIN Standard | B.S. DIN 931, DIN 933, DIN 912, DIN 934, DIN 6923, DIN 603, DIN 7981, DIN 970, DIN916, DIN 7982, DIN 7985, DIN 913 |
UTS | NPT, UNS, UNF, UNC, UNEF, NPTF |
ISO | ISO 4033, ISO 4032, ISO 7380, ISO 4017, JIS standards |
Threads | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
Type | Cold Forged, Hot Forged, Bar Stock Machined, Bar Stock Milling |
Corrosion Resistance of Stainless Steel A193 Grade B8: The corrosion resistance of A193 Grade B8 is a key characteristic of this stainless steel grade. Its resistance to corrosion is attributed to the presence of chromium, which forms a passive oxide layer on the surface when exposed to oxygen. This oxide layer acts as a protective barrier, preventing further corrosion and rusting.
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ASTM
|
A193
Grade B8 |
Percentage
|
%
|
C.
|
0.08 max.
|
Mn.
|
2.00 max.
|
Si.
|
1.00 max.
|
P.
|
0.045 max.
|
S.
|
0.030 max.
|
Cr.
|
18.00—20.00
|
Ni.
|
8.00—10.50
|
Mo.
|
—
|
V.
|
—
|
Ti.
|
—
|
Brinell Hardness
|
223 B.H.N.
max. |
Impact Value
|
Not
applicable |
Grade
|
Size
|
Tensile ksi, min
|
Yield, ksi, min
|
Elong, %, min
|
RA % min
|
B8 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
|
Hardness testing to ISO 6508-1
Nut proof load testing to ISO 898-2
Suitability for preloading to EN 14399-2
Calibrated gauges and tools
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