In the world of specialty steel alloys, one material stands out – 30CrNiMo8, a material that incorporates the rich qualities sought after in heavy-duty components. Let’s discover the advantages of this alloy, as well as learn about the 30CrNiMo8 steel equivalent.
Understanding 30CrNiMo8 Steel Equivalent
30CrNiMo8, also known by its equivalents such as EN 1.6580, PN 30H2N2M, NF 30CND8, and ISO 31CrNiMo8, is a heat-treatable steel renowned for its medium hardenability. Let’s delve into the specifics:
Chemical Composition of 30CrNiMo8 Steel Equivalent
Let’s break down the alloy’s composition:
| Element | 30CrNiMo8 (1.6580) | PN 30H2N2M | NF 30CND8 | ISO 31CrNiMo8 |
|---|---|---|---|---|
| C | 0.26 – 0.34 | 0.26 – 0.34 | 0.26 – 0.33 | 0.27 – 0.34 |
| Mn | 0.3 – 0.6 | 0.3 – 0.6 | 0.3 – 0.6 | 0.3 – 0.6 |
| P | <0.4 | 0.17 – 0.37 | <0.030 | <0.035 |
| S | <0.025 | <0.035 | <0.025 | <0.035 |
| Si | <0.035 | <0.035 | <0.025 | <0.035 |
| Ni | 1.8 – 2.2 | 1.8 – 2.1 | 1.8 – 2.2 | 1.8 – 2.2 |
| Cr | 1.8 – 2.2 | 1.8 – 2.1 | 1.8 – 2.2 | 1.8 – 2.2 |
| Mo | 0.3 – 0.5 | 0.25 – 0.35 | 0.3 – 0.5 | 0.3 – 0.5 |
Specification and Application of 30CrNiMo8 Steel Equivalent
Overview: Alloyed structural steel with medium hardenability, ideal for heavy-duty components.
Characteristics:
- High elasticity and strength properties (over 1560 N/mm² at small diameters).
- Max hardness of 248 HRB when softened.
- Resistance to variable loads and impacts.
Weldability: Not suitable for welding, needs additional preheating.
Applications: Ideal for heavily loaded parts in various industries, including automotive and power.
Mechanical Properties
Let’s learn its mettle under different dimensions:
| Dimension (mm) | Tensile Strength (Rm) | Yield Strength (Re) | Elongation (A) | Impact Strength (KV) |
|---|---|---|---|---|
| <16 | 1250 – 1450 N/mm² | >1050 N/mm² | >9% | – |
| 16-40 | 1250 – 1450 N/mm² | >1050 N/mm² | >9% | >35 J |
| 40-100 | 1100 – 1300 N/mm² | >900 N/mm² | >10% | >35 J |
| 100-160 | 1000 – 1200 N/mm² | >800 N/mm² | >11% | >45 J |
| 160-330 | >850 N/mm² | >630 N/mm² | >12% | >45 J |
| >330 | >800 N/mm² | >590 N/mm² | >12% | >40 J |
Heat Treatment
To bring out its best, 30CrNiMo8 undergoes meticulous heat treatment:
- Softening Annealing: 640 – 680°C
- Normalizing Annealing: 840 – 860°C
- Hardening: 815 – 845°C, cooling in oil
- Tempering: 550 – 650°C, cooling in air
Why Choose 30CrNiMo8?
The versatility of 30CrNiMo8 lies in its ability to meet demanding specifications across various industries. Its applications range from the automotive to the power industry, proving indispensable for crafting components that demand the perfect blend of strength, elasticity, and resistance.
Otai Special Steel Advantage
Our commitment to excellence sets us apart in the industry:
- Global Reach: Exporting to 30+ countries, adhering to international standards.
- Trusted Partnerships: Permanent supplier to ThyssenKrupp, China National Armaments Industry Corporation, and other top companies.
- Robust Inventory: Stocking 4140 sheets, ensuring a daily basic supply of 800 tonnes.
- Cost Efficiency: Reducing dealer costs by 20% and addressing end-user concerns.
- Proven Experience: Over 20 years in pre-sales and after-sales service, maintaining a stellar record.
- Quality Assurance: 8 consecutive years with no quality incidents, with a customer return order rate exceeding 80%.
- Swift Response: 2-hour after-sales response, shipment 2 days earlier, and proactive solutions for non-normal excess volume.
Concluding Thoughts
As we gain a basic understanding of the 30CrNiMo8 steel equivalent, one thing is obvious – it is a material with good mechanical properties that will meet the requirements of the most demanding applications. If you’re looking for the right alloy for your next project, consider the features of 30CrNiMo8. Feel free to share your thoughts and experiences in the comments below.
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