30CrNiMo8 Alloy Steel, Material Number: 1.6580
PRODUCT DESCRIPTION
30CrNiMo8 (1.6580) is a high-strength chromium-nickel-molybdenum alloy steel, known for its toughness, excellent fatigue resistance, and high wear resistance. Ideal for automotive, engineering, and machinery components.PRODUCT TYPES
Overview of 30CrNiMo8, 1.6580 Alloy Steel
30CrNiMo8 (1.6580) is a low-alloy steel containing chromium, nickel, and molybdenum, offering exceptional strength, toughness, and high resistance to wear and fatigue. This steel grade is widely used in the automotive, engineering, and machinery industries for components such as gears, shafts, and high-performance parts.
The alloy’s key features are its high strength and the ability to retain toughness under high stress and impact loading. It also offers good hardenability, meaning it can be heat-treated to achieve high strength and wear resistance, even in large sections.
Chemical Composition (in %)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.28 – 0.38 |
| Silicon (Si) | 0.15 – 0.35 |
| Manganese (Mn) | 0.40 – 0.70 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Chromium (Cr) | 0.90 – 1.10 |
| Nickel (Ni) | 1.25 – 1.50 |
| Molybdenum (Mo) | 0.15 – 0.30 |
Mechanical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Tensile Strength | 850 – 1050 MPa |
| Yield Strength | 650 – 850 MPa |
| Elongation (A) | ≥ 12% |
| Hardness (HB) | 220 – 280 |
Machinability
30CrNiMo8 steel is easy to machine in the annealed condition, and it responds well to common machining processes such as turning, milling, and drilling. Post-heat treatment, the material becomes harder and more difficult to machine. Use of carbide tools or high-speed steel (HSS) is recommended for machining.
Machining Tips:
-
Use carbide tools or HSS for best results.
-
Avoid high cutting speeds to prevent tool wear.
-
Use cooling and lubrication during machining to enhance tool life.
Weldability
30CrNiMo8 offers good weldability with proper procedures. Preheating is generally not required for sections up to 30 mm thick, but for thicker sections, it is recommended. Post-weld heat treatment may be necessary for thicker sections to relieve stresses and maintain strength.
Welding Tips:
-
Preheat sections thicker than 30 mm.
-
Use low-hydrogen electrodes to reduce the risk of cracks.
-
Apply post-weld heat treatment for stress relief in thicker sections.
Applications
-
Gears and shafts for automotive and machinery
-
High-performance components for engineering applications
-
Structural components exposed to high stresses
-
Aircraft and aerospace parts
Heat Treatment
-
Annealing: To soften the steel, increase machinability, and reduce internal stresses.
-
Quenching and Tempering: To improve hardness, strength, and wear resistance.
Advantages
-
High tensile strength and wear resistance.
-
Excellent fatigue resistance, making it ideal for high-stress components.
-
Good machinability in the annealed condition.
-
Retains toughness under high stress and impact loading.