SFS 510 Alloy Steel Bar 510 Round Bars 510 Rods

Product Description

SFS 510 is a specific technical designation within the Finnish National Standards (Suomen Standardisoimisliitto / SFS). It is a high-strength structural and machine structural alloy steel.

When ordered as round bars or rods, SFS 510 is recognized as a medium-carbon low-alloy steel boosted with chromium, molybdenum, and vanadium. This combination gives the material a highly sought-after combination of high yield strength, excellent core toughness, and weldability compared to basic carbon structural steels.

Chemical Composition Core

The robust mechanical integrity of SFS 510 stems from its multi-element alloying approach:

• Carbon (C): ~0.35 – 0.42% (Provides its core mechanical tensile limits)

• Chromium (Cr): ~1.25 – 1.50% (Improves through-hardenability and friction wear resistance)

• Molybdenum (Mo): ~0.60 – 0.80% (Provides microstructural stability and guards against temper embrittlement)

• Vanadium (V): ~0.10 – 0.15% (Refines grain structure to maximize fatigue life and impact resistance)

• Manganese (Mn): ~0.60 – 0.90%

Global Equivalents & Cross-References

If you are standardizing production lines across international borders or matching legacy engineering blueprints, SFS 510 shares high functional and chemical overlap with these standard profiles:

• Germany / Europe (DIN EN):X10CrMoVNb9-1 / 1.7386 or EN19 structural variants depending on specific regional sub-specs.

• United Kingdom (BS): S510 (Aerospace/defense equivalent structural sheet and bar series)

• United States (AISI / SAE): Close functional alternatives include 4140 or 8640 configurations.

• Common Structural Reference: Often cross-referenced alongside standard global Fe 510 high-yield structural classes.

Mechanical Properties (Typical Annealed vs. Heat Treated)

When delivered from the mill, SFS 510 round bars are typically supplied in a soft-annealed configuration to protect cutting inserts during turning or drilling before reaching their full strength targets:

Primary Engineering Applications

Thanks to its capacity to resist high fatigue limits and mechanical load pressures without cracking, SFS 510 rods are standard in these sectors:

• Heavy Construction Hardware: Structural anchoring rods, heavy tie-beams, and high-load foundation bolts.

• Rotating Machinery Elements: Power transmission shafts, high-torque industrial gears, and heavy-duty axles.

• Pressure Vessel Accessories: High-tensile strain bolts and structural flanges exposed to temperature fluctuations.

• Tooling Supports: Toughened load-bearing frames, bases, and high-impact structural joint components.

Commercial Supply Formats

Metal service centers distribute SFS 510 bars in several common configurations:

• Standard Profiles: Stock diameters typically span from 13mm up to 300mm+, commonly distributed in unified 6-meter lengths.

• Surface Finishes: Available as Black Hot-Rolled (best for deep-milling components) or precision Bright Cold-Drawn / Ground variants (optimized for high-precision automatic lathe processing).