| Spheroidized Annealed Spring Steel | ||
|---|---|---|
| ASTM A684 | ||
| Alloy | Temper | UNS Designation |
| 1050 | Annealed | G10500 |
| 1074/1075 | Annealed | G10740/10750 |
| 1095 | Annealed | G10950 |
| Annealed Spring Steel Chemical Composition | ||||||
|---|---|---|---|---|---|---|
| ASTM A684 | ||||||
| Alloy | Rockwell (approx) | Carbon | Manganese | Phosphorus (max) | Sulfur (max) | Silicon |
| 1050 | B-84 (max) | 048-.55 | .60-.90 | 0.03 | 0.035 | .15-.30 |
| 1074/1075 | B-86 (max) | .70-.80 | .50-.70 | 0.03 | 0.035 | .15-.30 |
| 1095 | B-86 (max) | .90-1.03 | .30-.50 | 0.03 | 0.035 | .15-.30 |
| Annealed Spring Steel Suggested Heat Treatments | |||
|---|---|---|---|
| ASTM A684 | |||
| Formed Springs | |||
| Requiring Heat Treatment | AISI - 1050 - SAE | AISI - 1074 - SAE | AISI - 1095 - SAE |
| Normalizing Temp | 1550 - 1650 F | 1550 - 1650 F | 1550 - 1650 F |
| Annealing Temp | 1400 - 1500 F | 1400 - 1500 F | 1400 - 1500 F |
| Hardening Temp | 1500 - 1550 F | 1475 - 1550 F | 1440 - 1475 F |
| As Oil Quenched | RC 58 | RC 64 | RC 66 |
| Rockwell Tensile PSI | Rockwell Tensile PSI | Rockwell Tensile PSI | |
| Drawing Temp. 400 F | RC 52 250,000 | RC 59 305,000 | RC 62 320,000 |
| Drawing Temp. 600 F | RC 45 210,000 | RC 53 255,000 | RC 55 270,000 |
| Drawing Temp. 700 F | RC 39 180,000 | RC 47 230,000 | RC 49 238,000 |
| Drawing Temp. 800 F | RC 35 160,000 | RC 44 205,000 | RC 45 212,000 |
| Drawing Temp. 900 F | RC 31 139,000 | RC 40 182,000 | RC 41 189,000 |
| Drawing Temp. 1000 F | RC 27 124,000 | RC 36 162,000 | RC 38 176,000 |
| Drawing Temp. 1100 F | RC 22 112,000 | RC 32 140,000 | RC 34 155,000 |
| Drawing Temp. 1200 F | N/A N/A | RC 26 122,000 | RC 30 138,000 |
