1. Summary
It has high processability, weldability, corrosion resistance, low carbon content, and addition of stabilizing element Ti.
2. Features
1) Ferritic heat-resistant steel containing 11% Cr, maintaining a complete BCC structure at high and normal temperatures;
2) Excellent processability and weldability, with appropriate high temperature characteristics and corrosion resistance at room temperature.
3. Scope of application
Heat exchangers, heat-resistant equipment, automobile exhaust pipe parts, low-grade Western tableware, electronic parts, containers, etc.
4. Chemical composition (JIS G 4305-2005) (wt%)
Chemical composition | C | Si | Mn | P | S | Cr | Ti |
Standard | £0.03 | £1.00 | £1.00 | £0.04 | £0.030 | 10.5~11.75 | C*6%~0.75 |
General | 0.009 | 0.60 | 0.25 | 0.020 | 0.002 | 11.20 | 0.20 |
5. Performance (JIS G 4305-2005)
Distinguish | Mechanical properties | Remarks | |||
Ys (Mpa) | Ts (Mpa) | El (%) | Hv | ||
Standard | ≥ 175 | ≥ 360 | ≥ 25 | ≤ 175 | NO.2D/0.6t |
| General | 234 | 425 | 35 | 135 | |
6. Physical properties
| Density (g/cm3) | Magnetic | Resistance (10-6.W.cm) | Specific heat 250C(J/kg.0C) | Thermal conductivity 1000C(W/m. 0C) | Thermal expansion rate 20~1000C(10-6/0C) | Young’s modulus N/mm2(103) |
7.74 | Have | 59 | 468 | 32.9 | 11.4 | 201 |
7. Use status
1) Annealing and solid solution state:
NO.1, 2D, 2B, and various other surface treatment states
2) Rolling hard.
8. Precautions for use
1) Magnetic phenomenon will appear after cold working;
2) The steel grade with the lowest Cr content among all stainless steels has relatively poor corrosion resistance;
3) Although there is no big difference in chemical composition between 409L for containers and 409L for exhaust pipes, due to the different manufacturing and processing processes of steel plants, the strength
There are differences in academic performance. The elongation rate of stainless steel used in containers is relatively low, which is not suitable for exhaust pipe applications; while the exhaust pipe uses 409L,
The period hardness and yield strength are relatively low, and it is not suitable for container use. Do not mix the two.