A4 Stainless Steel Compression Springs combine the dimensional form of DIN 2098 with the material properties of grade A4-80 (316): superior, including marine and chloride environments, largely non-magnetic, service range approx. -200 °C to +400 °C. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.
Why Choose A4 Stainless Steel for Compression Springs
Specified for marine, coastal and chemical applications. For compression springs, this matters when superior, including marine and chloride environments is the primary requirement.
Mechanical & Physical Properties
| Grade designation | A4-80 (316) |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C |
| Corrosion characteristic | Superior, including marine and chloride environments |
Galvanic & Galling Considerations
Two important notes for stainless compression springs: (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.
Comparable Grades
For Compression Springs, the alternative stainless grade is A2 (304). A2 (304) suits general indoor and outdoor service; A4 (316) adds molybdenum for marine and chloride environments. Where higher strength matters more than corrosion, switch to plated alloy-steel class 8.8 or 10.9.
Sizes of Compression Springs Available in A4 Stainless Steel
| Wire dia d (mm) | Inner diameter Di (mm) | Outer diameter De (mm) | Free length Lo (mm) | Active coils n | Rated force Fn (N) | Rate k (N/mm) | Material | Reference standard | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 3.0 | 4.0 | 15 | 8 | 8 | 1.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 0.5 | 4.0 | 5.0 | 20 | 10 | 6 | 0.7 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 0.6 | 4.0 | 5.2 | 20 | 9 | 12 | 1.5 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 0.7 | 5.0 | 6.4 | 25 | 10 | 15 | 1.5 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 0.8 | 5.0 | 6.6 | 25 | 10 | 22 | 2.5 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 1.0 | 6.0 | 8.0 | 30 | 10 | 35 | 3.5 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 1.0 | 8.0 | 10.0 | 40 | 12 | 25 | 2.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 1.2 | 8.0 | 10.4 | 40 | 10 | 55 | 6.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 1.5 | 10.0 | 13.0 | 50 | 10 | 80 | 8.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 1.6 | 12.0 | 15.2 | 60 | 10 | 90 | 8.5 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 2.0 | 12.0 | 16.0 | 60 | 10 | 165 | 18.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 2.0 | 16.0 | 20.0 | 80 | 12 | 110 | 10.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 2.5 | 16.0 | 21.0 | 80 | 10 | 260 | 28.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 2.5 | 20.0 | 25.0 | 100 | 12 | 200 | 18.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 3.0 | 20.0 | 26.0 | 100 | 10 | 450 | 45.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 3.0 | 25.0 | 31.0 | 120 | 12 | 320 | 28.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 4.0 | 25.0 | 33.0 | 120 | 10 | 1000 | 90.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 4.0 | 30.0 | 38.0 | 150 | 12 | 750 | 65.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 5.0 | 30.0 | 40.0 | 150 | 10 | 1900 | 170.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 5.0 | 40.0 | 50.0 | 200 | 12 | 1200 | 100.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 6.0 | 40.0 | 52.0 | 200 | 10 | 3300 | 280.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 6.0 | 50.0 | 62.0 | 250 | 12 | 2100 | 185.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 8.0 | 50.0 | 66.0 | 250 | 10 | 7500 | 650.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 8.0 | 65.0 | 81.0 | 300 | 12 | 4800 | 430.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 10.0 | 65.0 | 85.0 | 300 | 10 | 14500 | 1200.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |
| 10.0 | 80.0 | 100.0 | 350 | 12 | 9500 | 800.0 | Spring steel SH/DH | DIN 2098 / EN 15800 | Compression spring, ground ends |