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STAINLESS STEEL
Stainless Steel 304L
UNS S30403, AISI 304L, AMS 5511
Stainless SteelLow Cost
DENSITY
8 kg/m³
MELTING POINT
1,400°C
TENSILE STRENGTH
515 MPa
MAX SERVICE TEMP
870°C
Stainless Steel 304L is a stainless steel used in aerospace applications. Melting point: 1,400 °C. Tensile strength: 515 MPa.
ABOUT STAINLESS STEEL 304L
Stainless Steel 304L is an austenitic chromium-nickel steel with low carbon content for improved weldability. It is one of the most versatile and widely used stainless steels in aerospace ground support equipment and cryogenic systems. SpaceX famously uses 304L stainless steel for the Starship vehicle body.
CHEMICAL COMPOSITION
Fe bal, Cr 18-20%, Ni 8-12%, C 0.03% max, Mn 2% max
ROCKET & SPACECRAFT APPLICATIONS
●Starship vehicle skin
●Cryogenic piping
●Ground support equipment
●Propellant storage tanks
●Launch pad structures
MANUFACTURING PROPERTIES
CORROSION RESISTANCE
Good
WELDABILITY
Excellent
MACHINABILITY
Good
COST RATING
Low
MECHANICAL PROPERTIES
| DENSITY | 8 kg/m³ |
| TENSILE STRENGTH | 515 MPa |
| YIELD STRENGTH | 205 MPa |
| STRENGTH-TO-WEIGHT | 64375 kN·m/kg |
THERMAL PROPERTIES
| MELTING POINT | 1,400 °C |
| MAX SERVICE TEMPERATURE | 870 °C |
| THERMAL CONDUCTIVITY | 16.2 W/m·K |
| THERMAL EXPANSION | 17.3 µm/m·K |
COMPLETE SPECIFICATIONS
| CATEGORY | Stainless Steel |
| DESIGNATIONS | UNS S30403, AISI 304L, AMS 5511 |
| MANUFACTURER | Various (Outokumpu, Aperam, POSCO) |
| DENSITY | 8 kg/m³ |
| TENSILE STRENGTH | 515 MPa |
| YIELD STRENGTH | 205 MPa |
| MELTING POINT | 1,400 °C |
| MAX SERVICE TEMP | 870 °C |
| THERMAL CONDUCTIVITY | 16.2 W/m·K |
| THERMAL EXPANSION | 17.3 µm/m·K |
| CORROSION RESISTANCE | Good |
| WELDABILITY | Excellent |
| MACHINABILITY | Good |
| COST RATING | Low |
