S460N — normalised fine-grain structural steel 460 MPa yield. For crane booms, bridges and offshore jackets requiring higher strength than S355.
Standards
| Standard Body |
Designation |
Country |
| EN 10025-3 |
S460N / S460NL |
EU |
| ASTM |
A572 Grade 65 (nearest) |
USA |
| BS EN |
S460N |
UK |
| JIS |
SM570 (nearest) |
Japan |
| GOST |
14G2AF (nearest) |
Russia |
| GB |
Q460C |
China |
| JUS |
No direct equivalent |
Yugoslavia |
Composition (wt.%)
| Element |
Symbol |
Min % |
Max % |
Typical % |
| Carbon |
C |
— |
0.200 |
0.160 |
| Silicon |
Si |
— |
0.600 |
0.350 |
| Manganese |
Mn |
— |
1.700 |
1.550 |
| Niobium |
Nb |
— |
0.060 |
0.040 |
| Vanadium |
V |
— |
0.200 |
0.100 |
| Titanium |
Ti |
— |
0.050 |
0.025 |
Physical
Melting Range
1490 – 1525
°C
Thermal Conductivity
45
W/mK
Thermal Expansion
12
×10⁻⁶/K
Machinability
| Rating |
48.0% (B1112=100%) |
| Turning HSS |
26.0 m/min |
| Turning Carbide |
135.0 m/min |
| Surface Finish |
Ra 1.6-3.2 um |
| Coolant |
Soluble oil 5-8% |
Mechanical
| Condition |
Rm (MPa) | Re (MPa) | A (%) |
HB | HRC | KV (J) | E (GPa) |
| Normalized t<=16mm (+N) |
550 – 720 |
≥460 |
≥17 |
— |
— |
34 |
210 |
| Normalized 16<t<=40mm (+N) |
540 – 710 |
≥440 |
≥17 |
— |
— |
34 |
210 |
Heat Treatment
| Process |
Temperature |
Medium |
Duration |
Hardness After |
| Normalizing |
890 – 940°C |
Still Air |
- |
Delivery condition. |
| Stress Relieving |
530 – 580°C |
Furnace |
1h/25mm |
No change |
Applications
Heavy Cranes: Crane girder beams, lattice boom sections and crane runway beams.
High-Rise: Building columns, transfer beams and long-span floor beams.
Bridges: Long-span bridge plate girders, box girders and arch ribs.
Notes
S460N vs S355J2: S460N: 30% higher yield. For same load: 25-30% thinner sections → significant weight and material cost saving on large structures. CE typically 0.47-0.53 — pre-heat 100 C for t>30 mm.