St 460 TS material equivalent S420N?

To determine if St 460 TS is a material equivalent to S420N, we need to compare their properties, standards, and applications. Since "St 460 TS" is not a standard designation in widely recognized steel standards (e.g., EN, DIN, ASTM), I’ll make an informed assessment based on the context and assume it refers to a high-strength structural steel, possibly a variant like StE 460 (DIN) or a similar grade, as "St" often relates to German standards (e.g., DIN designations). S420N is a normalized, high-strength, low-alloy structural steel under EN 10025-3 with a minimum yield strength of 420 MPa and -20°C toughness. Let’s analyze their equivalence systematically.

Step 1: Understanding S420N

S420N, part of the en 10025 3 normalized steel plate family, is defined under EN 10025-3:2019. Its designation breaks down as:

• S: Structural steel.
• 420: Minimum yield strength of 420 MPa (≤16 mm).
• N: Normalized or normalized rolled, tested for impact toughness at -20°C.

S420N is used for bridges, cranes, and building frameworks in moderate climates, offering a balance of strength, toughness, and weldability.

Step 2: Clarifying St 460 TS

The designation "St 460 TS" is not explicitly listed in current EN, DIN, or other major standards, suggesting it may be a typo, a non-standard grade, or a historical designation. However, based on the naming convention:

• St: Likely refers to a German structural steel (e.g., StE 460 under DIN 17102 for weldable fine-grain steels).
• 460: Indicates a minimum yield strength of approximately 460 MPa.
• TS: Could imply "thermomechanically rolled steel" (similar to TMCP in EN 10025-4) or a specific toughness designation.

Given the context, I’ll assume St 460 TS is similar to StE 460 (DIN 17102), a weldable fine-grain structural steel with a yield strength of ~460 MPa and -20°C toughness, as it’s the closest match to S420N’s properties. If St 460 TS refers to a different standard or grade, please clarify (e.g., specific standard or region), and I can refine the comparison.

Step 3: Chemical Composition Comparison

Here’s a comparison of the chemical compositions of S420N (EN 10025-3) and StE 460 (DIN 17102, assumed for St 460 TS):

Carbon Equivalent (CEV):

• S420N: ≤0.48% (≤63 mm).
• StE 460: ≤0.48% (≤63 mm).

The compositions are nearly identical, with S420N having slightly lower sulfur (0.025% vs 0.030%) and phosphorus (0.030% vs 0.035%), which marginally improves toughness and weldability, similar to en 10025 3 s420n normalized structural steel plate.

Step 4: Mechanical Properties Comparison

Comparing the mechanical properties of S420N and StE 460 (assumed for St 460 TS):

• Yield Strength: StE 460’s 460 MPa is higher than S420N’s 420 MPa, making it stronger but potentially less ductile for certain designs.
• Tensile Strength: StE 460 (560-730 MPa) is slightly higher than S420N (520-680 MPa), reflecting its increased strength.
• Elongation: S420N’s ≥19% elongation is higher than StE 460’s ≥17%, indicating better ductility for forming.
• Impact Toughness: Both offer ≥27 J at -20°C, ensuring similar performance in moderate climates.
• Thickness: Both support up to 200 mm, versatile like en 10025 3 s355n normalized structural steel plate.

Step 5: Processing and Fabrication

• S420N: Normalized for consistent microstructure; suited for standard welding. Preheating (100-150°C) for >20 mm; PWHT optional (550-650°C). CEV ≤0.48%.
• StE 460: Normalized with similar welding requirements; slightly higher strength may require adjusted welding parameters. CEV ≤0.48%.

Consumables: Both use ER70S-6 (GMAW) and EM12K flux with EH14 wire (SAW). S420N’s lower impurities slightly enhance weld quality, similar to en 10025 3 s275n normalized structural steel plate.

Step 6: Applications

• S420N: Used in bridges, cranes, and building frameworks in moderate climates, where 420 MPa yield strength is sufficient.
• StE 460: Similar applications but suited for projects needing higher strength (460 MPa), such as heavy-load structures.

Both grades are suitable for similar structural applications, but StE 460’s higher strength makes it a partial equivalent, better suited for higher load demands.

Step 7: Equivalence Assessment

Is St 460 TS (assumed as StE 460) equivalent to S420N?

• Partial Equivalent: StE 460 is not a direct equivalent to S420N due to its higher yield strength (460 MPa vs 420 MPa) and tensile strength (560-730 MPa vs 520-680 MPa). However, it can serve as a substitute in applications where higher strength is acceptable or preferred, and -20°C toughness is sufficient.
• Key Considerations:
  • Strength: StE 460’s higher strength may require design adjustments to account for reduced ductility (17% vs 19% elongation).
  • Toughness: Both match at -20°C (≥27 J), making StE 460 suitable for moderate climates.
  • Weldability: Nearly identical CEV (≤0.48%) ensures comparable welding, with S420N slightly better due to lower sulfur and phosphorus.

For closer equivalence, S460N (EN 10025-3, 460 MPa yield, -20°C toughness) is a better match to StE 460, as seen in en 10025 3 s460n normalized structural steel plate. For colder climates, consider en 10025 3 s460nl normalized structural steel plate (-50°C toughness).

Why Choose Gangsteel?

Gangsteel supplies S420N, S460N, and potential equivalents like StE 460:

• Inventory: Extensive stock in China.
• Sizes: Thickness 6–200 mm, widths 2000/2500/3000 mm, lengths up to 12,000 mm.
• Delivery: 7-30 days globally.
• Certifications: EN 10204 3.1/3.2, UT testing (EN 10160), ABS/LR/BV/DNV approvals.
• Processing: Cutting, welding, bending.

Contact us for en 10025 3 s420n normalized structural steel plate.

FAQ

Is St 460 TS equivalent to S420N?St 460 TS (assumed as StE 460) is a partial equivalent to S420N, with higher yield strength (460 MPa vs 420 MPa) but matching -20°C toughness. S460N is a closer match.

How do S420N and St 460 TS strengths compare?St 460 TS (StE 460) has a higher yield strength (460 MPa) than S420N (420 MPa), suitable for heavier loads but with slightly lower ductility.

Can St 460 TS replace S420N?St 460 TS can replace S420N in applications allowing higher strength, but design adjustments may be needed due to its 460 MPa yield vs S420N’s 420 MPa.

Are S420N and St 460 TS weldable?Yes, both have a CEV ≤0.48%, enabling GMAW/SAW welding with preheating (100-150°C for >20 mm); S420N’s lower impurities slightly improve weld quality.

What applications use S420N and St 460 TS?Both are used in bridges, cranes, and frameworks in moderate climates, with St 460 TS suited for higher load demands.

What certifications support S420N and St 460 TS?Gangsteel provides S420N with EN 10204 3.1/3.2, UT testing (EN 10160), and ABS/LR/BV/DNV approvals; StE 460 has similar certifications.