Steel grades
| Grade | Type | Min. yield (N/mm²) | Typical use |
|---|---|---|---|
| S275JR | Structural carbon steel | 275 | Plates, angles, lightly loaded members |
| S355J2 | Structural carbon steel | 355 | Beams, columns and most structural sections |
| 304 (1.4301) | Austenitic stainless | 210 | Internal balustrades and handrails |
| 316 (1.4401) | Austenitic stainless | 220 | External and coastal metalwork |
Yield values are minimums for thinner products. Stainless values are 0.2% proof strength. Your specification governs.
Standards
- BS EN 1090-1: factory production control and UKCA marking
- BS EN 1090-2: technical requirements for steel fabrication
- BS EN 10025: hot-rolled structural steel
- BS EN 10210 and 10219: hollow sections
- BS EN ISO 1461: hot-dip galvanising
- BS EN ISO 9606-1: welder qualification
- Approved Document K and BS 6180: guarding and balustrades
Quality checks on every job
- Mill certificates checked against the order
- Dimensions checked against the fabrication drawing
- Visual weld inspection on every weld
- Coating thickness checks where specified
- Records kept for the handover file
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