Stainless Steel 316 / ASTM A182 F316Forging Metallurgy & Specs
Molybdenum-Bearing Austenitic Stainless Steel for Marine & Acid Service. 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 316 / ASTM A182 F316 (UNS S31600 / 1.4401 / X5CrNiMo17-12-2) offers a minimum tensile strength of 515 MPa min (75 ksi) and yield strength of 205 MPa min (30 ksi) with 145 – 195 HBW max hardness. Manufactured by Jayesh Forge in Rajkot, Gujarat strictly up to 50 kg per piece, this alloy features PREN ~ 23 – 25; superior resistance to seawater, brine, and de-icing salts. Tested per ASTM A388 Level II ultrasonic standards with EN 10204 3.1 MTC inspection.
Stainless Steel 316 / ASTM A182 F316 Chemical Analysis (% by Weight)
| Element | Chemical Symbol | Minimum (%) | Maximum (%) | Specification Role |
|---|---|---|---|---|
| Carbon | C | — | 0.08% | Controls base tensile strength & core hardness |
| Chromium | Cr | 16.00% | 18.00% | Forms passive chromium oxide layer for oxidation & corrosion resistance |
| Nickel | Ni | 10.00% | 14.00% | Improves notch toughness, cryogenic ductility & hardenability |
| Molybdenum | Mo | 2.00% | 3.00% | Prevents chloride pitting and enhances high-temperature creep strength |
| 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 316 / ASTM A182 F316 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
1200°C – 920°C (2190°F – 1685°F)
Solution treated at 1040°C – 1120°C, rapidly water quenched
PREN ~ 23 – 25; superior resistance to seawater, brine, and de-icing salts
Machinability: 40% of AISI 1212 • Excellent with ER316 filler wire
International Equivalent Material Grades
Forged Components Manufactured in SS 316
Marine & Chemical Flanges
Class 150# to 1500# flanges for offshore platforms and desalination plants.
SS 316 Frequently Asked Technical Questions
The 2.0–3.0% Molybdenum addition stabilizes the passive chromium oxide layer against halide ion attack, preventing pitting and crevice corrosion in chloride-rich environments like ocean seawater and chemical washdown lines.
Related Industrial Metallurgy Specifications
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