Compression Springs manufactured in A2 Stainless Steel (A2-70 (304)) are dimensioned to DIN 2098. The sections below give the mechanical and physical properties of the grade, its behavior in corrosive and elevated-temperature service, and the full size table.
Why Choose A2 Stainless Steel for Compression Springs
The most common stainless grade for indoor and general outdoor fasteners. For compression springs, this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | A2-70 (304) |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C |
| Corrosion characteristic | Good general corrosion resistance |
Corrosion Behavior in Service
A2 (304) gives excellent atmospheric and most-water corrosion resistance and is the most common stainless for Compression Springs in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Comparable Grades
For Compression Springs, the alternative stainless grade is A4 (316). 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 A2 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 |