AISI Type 302 Stainless Steel Properties, SS302 Composition, Magnetic, Density, Hardness, Equivalent
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Family: Stainless Steel
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Cr | 17.0-19.0 |
| Ni | 8.0-10.0 |
| Vl | 7.9 (0.29) |
| Vs | 3.12 |
| Vt | 5.66 |
| C, ≤ | 0.15 |
| N, ≤ | – |
| P, ≤ | 0.04 |
| S, ≤ | 0.03 |
| Cu, ≤ | 0.75 |
| Mn, ≤ | 2.00 |
| Mo, ≤ | 0.75 |
| Si, ≤ | 1.00 |
| AISI (UNS) | SAE 30302 |
| Name [UNS] | 1Cr18Ni9; 12Cr18Ni9 (New designation); [S30210] |
| g/cm3 (lb/in3) | Vl- Longitudinal (compression) waves; Vt- Transverse (shear) waves; Vs- Surface waves For longitudinal waves Zl = ρVl. |
| Name (ISO Number) | X9CrNi18-9 (4325-302-00-E) |
| (Zl) 106 g/cm2 · s | 3.12 |
| Name (Steel Number) | SUS302B |
Where to Buy AISI Type 302 Stainless Steel Properties, SS302 Composition, Magnetic, Density, Hardness, Equivalent
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Description
Type 302 stainless steel is basically a higher carbon version of type 304, a variant of 18-8 stainless steel. Its carbon content is ≤0.15%, and the minimum chromium content is only 1% less than 304. Grade 302 stainless steel spring wire (specified in ASTM A313) has high heat resistance and good corrosion resistance, and has excellent spring performance in the full hard or tempered condition. The main difference between SS 302, 304 and 304L is the carbon content, so there is a difference in the amount of carbide precipitation that may occur in the heat affected zone (HAZ) after heating and cooling cycles are encountered in welding. The P content of type 303 and 303Se is ≤0.20%, plus 0.15% of Se or S for free machining. These elements are not conducive to weldability and may cause severe hot cracking of the weld metal. AISI 301 has lower nickel and chromium content, so the work hardening rate is higher than AISI 302. The following tables and lists give the stainless steel 302 datasheet and specification including chemical composition, physical properties and mechanical properties, heat treatment, welding, etc. SS 302 material chemical composition is listed in the following table.