catalogue >> Alloy Steel Bars for Special Application Bolting Materials
Steel Type Standard Country Code C(%) V(%) Si(%) Mn(%) P(%) S(%) Cr(%)
40CrMoV4-7 17240 DIN 0.35-0.45 0.25-0.35 0.20-0.35 0.45-0.70 <0.04 <0.04 0.8-1.2
SNB21-1 G4108 JIS 0.36-0.44 0.25-0.35 0.20-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
Gr.B21-1 A540 ASTM 0.36-0.44 0.25-0.35 0.15-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
SNB21-2 G4108 JIS 0.36-0.44 0.25-0.35 0.20-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
Gr.B21-2 A540 ASTM 0.36-0.44 0.25-0.35 0.15-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
SNB21-3 G4108 JIS 0.36-0.44 0.25-0.35 0.20-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
Gr.B21-3 A540 ASTM 0.36-0.44 0.15-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
SNB21-4 G4108 JIS 0.36-0.44 0.25-0.35 0.20-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
Gr.B21-4 A540 ASTM 0.36-0.44 0.25-0.35 0.15-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
SNB21-5 G4108 JIS 0.34-0.46 0.25-0.35 0.20-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
Gr.B21-5 A540 ASTM 0.36-0.44 0.25-0.35 0.20-0.35 0.45-0.70 <0.025 <0.025 0.80-1.15
SNB22-1 G4108 JIS 0.39-0.46 0.20-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
Gr.B22-1 A540 ASTM 0.39-0.46 0.15-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
42CrMoV4 17240 DIN 0.30-0.45 0.15-0.40 0.5-0.8 <0.025 <0.025 0.9-1.2
SNB22-2 G4108 JIS 0.39-0.46 0.20-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
Gr.B22-2 A540 ASTM 0.39-0.46 0.15-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
SNB22-3 G4108 JIS 0.39-0.46 0.20-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
Gr.B22-3 A540 ASTM 0.39-0.46 0.15-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
SNB22-4 G4108 JIS 0.39-0.45 0.20-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
Gr.B22-4 A540 ASTM 0.39-0.45 0.15-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
SNB22-5 G4108 JIS 0.39-0.46 0.20-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
Gr.B22-5 A540 ASTM 0.39-0.46 0.15-0.35 0.65-1.10 <0.025 <0.025 0.75-1.20
SNB23-1 G4108 JIS 0.37-0.44 0.20-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95
Gr.B23-1 A540 ASTM 0.37-0.44 0.15-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95
SNB23-2 G4108 JIS 0.37-0.44 0.20-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
Gr.B23-2 A540M ASTM 0.37-0.44 0.15-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
SNB23-3 G4108 JIS 0.37-0.44 0.20-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
Gr.B23-3 A540 ASTM 0.37-0.44 0.15-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
SNB23-4 G4108 JIS 0.37-0.44 0.20-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
Gr.B23-4 A540 ASTM 0.37-0.44 0.15-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
SNB23-5 G4108 JIS 0.37-0.44 0.20-0.35 0.60-0.95 <0.025 <0.025 0.65-0.95 0.2-0.3
Gr.B23-5 A540 ASTM 0.37-0.44 0.15-0.35 0.55-0.90 <0.035 <0.04 0.65-0.95 0.2-0.3
SNB24-1 G4108 JIS 0.37-0.44 0.20-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
Gr.B24-1 A540 ASTM 0.37-0.44 0.15-0.35 0.7-0.9 <0.025 <0.025 0.7-0.9 0.3-0.4
40NiCrMo7-3 17242 DIN 0.37-0.44 0.20-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
SNB24-2 G4108 JIS 0.37-0.44 0.20-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
Gr.B24-2 A540 ASTM 0.37-0.44 0.7-0.9 0.7-0.9 <0.025 <0.025 0.7-0.9 0.3-0.4
SNB24-3 G4108 JIS 0.37-0.44 0.20-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
Gr.B24-3 A540 ASTM 0.37-0.44 0.15-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
SNB24-4 G4108 JIS 0.37-0.44 0.20-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
Gr.B24-4 A540 ASTM 0.37-0.44 0.15-0.35 0.7-0.9 <0.025 <0.025 0.7-0.9 0.3-0.4
SNB24-5 G4108 JIS 0.37-0.44 0.20-0.35 0.7-0.9 <0.025 <0.025 0.70-0.95 0.3-0.4
Alloy steel bars are a type of steel that is blended with various alloying elements to enhance its overall mechanical properties. They are commonly used in special application bolting materials, where high strength and durability are essential.

The following are some of the key characteristics and advantages of alloy steel bars for special application bolting materials:

1. High Strength: Alloy steel bars have excellent strength properties, making them suitable for heavy-duty applications. They can withstand high loads and stresses without deforming or failing.

2. Superior Hardness: Alloy steel bars are known for their high hardness levels, which contribute to their resistance against wear, abrasion, and deformation. This makes them ideal for applications where the bolts are exposed to harsh environments or constant friction.

3. Improved Corrosion Resistance: Some alloying elements, such as chromium and nickel, provide alloy steel bars with improved corrosion resistance. This helps to prevent rusting and maintain the integrity of the bolts, especially in environments where they may be exposed to moisture or corrosive substances.

4. Enhanced Toughness: Alloy steel bars exhibit excellent toughness, meaning they can absorb energy and resist fracture under impact loads. This property is particularly important in bolting applications where the bolts may be subjected to sudden shocks or vibrations.

5. Customizable Composition: Alloy steel bars can be customized to meet specific requirements by adjusting the composition of alloying elements. This offers flexibility in tailoring the mechanical properties, such as strength, hardness, and toughness, to suit the application's needs.

In summary, alloy steel bars are highly suitable for special application bolting materials due to their high strength, superior hardness, improved corrosion resistance, enhanced toughness, and customizable composition. These properties make alloy steel bars reliable and long-lasting, ensuring the secure and efficient operation of bolted connections in critical applications.