Stainless Steel 304 / ASTM A182 F304Forging Metallurgy & Specs
General Purpose 18/8 Austenitic Stainless Steel for Corrosion Containment. Hot-forged and precision-machined in Rajkot, Gujarat strictly up to 50 kg max piece weight with 100% Optical Emission Spectrometry (OES) PMI testing and EN 10204 3.1 MTC compliance.
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Stainless Steel 304 / ASTM A182 F304 (UNS S30400 / 1.4301 / X5CrNi18-10) offers a minimum tensile strength of 515 MPa min (75 ksi) and yield strength of 205 MPa min (30 ksi) with 140 – 192 HBW max hardness. Manufactured by Jayesh Forge in Rajkot, Gujarat strictly up to 50 kg per piece, this alloy features Excellent in potable water, food acids, and normal industrial atmospheres. Tested per ASTM A388 Level II ultrasonic standards with EN 10204 3.1 MTC inspection.
Stainless Steel 304 / ASTM A182 F304 Chemical Analysis (% by Weight)
| Element | Chemical Symbol | Minimum (%) | Maximum (%) | Specification Role |
|---|---|---|---|---|
| Carbon | C | — | 0.08% | Controls base tensile strength & core hardness |
| Chromium | Cr | 18.00% | 20.00% | Forms passive chromium oxide layer for oxidation & corrosion resistance |
| Nickel | Ni | 8.00% | 11.00% | Improves notch toughness, cryogenic ductility & hardenability |
| Manganese | Mn | — | 2.00% | Combines with sulfur, increases hardenability and hot workability |
| Silicon | Si | — | 1.00% | Deoxidizer during melting; improves high-temperature scaling resistance |
| Phosphorus | P | — | 0.04% | Restricted to prevent temper embrittlement |
| Sulfur | S | — | 0.03% | Strictly controlled for cleaner grain flow and micro-cleanliness |
* Ladle chemical analysis verified using optical emission spectrometer (OES) calibrated to NIST certified reference materials. Full chemical results recorded on EN 10204 3.1 MTC.
Stainless Steel 304 / ASTM A182 F304 Mechanical Properties
Ultimate breaking stress threshold
Elastic deformation limit
Plastic ductility before rupture
Surface indentation resistance
Cross-sectional necking ductile ratio
Dynamic fracture energy absorption
Thermal Cycle & Machining Parameters
1180°C – 900°C (2150°F – 1650°F)
Solution annealed at 1040°C – 1100°C followed by rapid water quench to maintain carbide retention
Excellent in potable water, food acids, and normal industrial atmospheres
Machinability: 45% of AISI 1212 • Excellent weldability with 308 filler; subject to sensitization if welded without subsequent solution annealing
International Equivalent Material Grades
Forged Components Manufactured in SS 304
Forged Stainless Steel Flanges
Class 150# to 600# forged stainless flanges for food, beverage, and dairy systems.
SS 304 Frequently Asked Technical Questions
SS 304 has up to 0.08% carbon, whereas SS 304L has a strict maximum carbon limit of 0.030%. The lower carbon in 304L eliminates carbide precipitation at grain boundaries during welding, preventing intergranular corrosion without requiring post-weld solution annealing.
Related Industrial Metallurgy Specifications
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