SUBENTRY NOZZLES (SEN)
Direct steel from tundish to mould with precision flow control for surface quality
PRODUCT OVERVIEW
Subentry nozzles (SEN) are immersed in the liquid steel pool inside the continuous casting mould, directing steel flow below the meniscus. The flow pattern created by the SEN geometry directly influences slab surface quality, solidification uniformity, and inclusion distribution. Premium SEN design reduces oscillation marks and improves yield.
KEY PROPERTIES
Port Design
Single / Dual port — custom angles
Anti-clogging
Zirconia insert at steel-contact bore
Immersion Depth
Customer-specified
Thermal Shock
Extremely high resistance required
Life
1 sequence (4–12 heats typical)
Material
Al₂O₃-C with ZrO₂-C bore insert
APPLICATIONS
TECHNICAL SPECIFICATIONS
| Grade | Al₂O₃ | Carbon | ZrO₂ Insert | Service Life | Max Temp |
|---|---|---|---|---|---|
| Slab SEN Std | 65% | 20% | 90% | 1 sequence | 1600°C |
| Slab SEN Prem | 70% | 18% | 95% | 2 sequences | 1600°C |
| Fused Silica | — | — | — | 1 sequence | 1500°C |
* Test conditions: IS 1528 (India) / ASTM C-133 / EN 1402. Values are typical — exact data sheets available on request.
AVAILABLE GRADES
INSTALLATION NOTES
- 1
Pre-heat SEN to 1000–1100°C using dedicated SEN pre-heater (minimum 45 minutes)
- 2
Never cold-insert SEN into liquid steel — thermal shock will crack it immediately
- 3
Align SEN centrally in mould — offset causes asymmetric flow and quality problems
- 4
Apply anti-oxidation paste to upper flange and tundish bottom nozzle interface
WHY BUY FROM SHANKER AGENCIES
IFGL (India's leading flow control refractory manufacturer) has developed SEN designs optimised for each major Indian caster configuration. Shanker Agencies supplies IFGL SEN with the full plant-specific documentation package.
PARTNER BRANDS
QUICK INFORMATION
Max Temperature
1600°C
Category
Flow Control
Grades Available
4 Standard Grades
Industries Served
Brands We Supply
• IFGL Refractories
• TRL Krosaki
📦 Quick Delivery
Standard grades in stock — Delhi warehouse. Pan-India delivery in 2–5 days. Same-day dispatch for urgent orders ≤ 2 MT.
MORE IN FLOW CONTROL
READY TO ORDER OR NEED A SAMPLE?
Our engineers can recommend the exact grade for your application. Sample kits available for trials. No minimum order on standard grades.