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Spring Steel Temper Calculator

Calculate heat treatment specifications for spring steel based on alloy type and dimensions.

Spring Steel Type

Temper Target

Wire / Strip Thickness

Unit

Heat Treatment Specs for 5160 (Chromium Spring Steel)

Austenitizing Temperature

1500–1550°F (816–843°C)

Quench Medium

Oil quench

Tempering Temperature Range

700–900°F (371–482°C)

Expected Hardness (spring temper)

42–52 HRC

Common Spring Steel Properties

Steel	Carbon	Chromium	Typical Applications
5160	0.56–0.64%	0.7–0.9%	Leaf springs, swords, large blades
1075	0.70–0.80%	—	General springs, flat springs, bandsaw blades
1095	0.90–1.04%	—	Knife springs, clock springs, hand tools
4140	0.38–0.43%	0.8–1.1%	Heavy-duty springs, torsion bars, arbors
301 SS	0.15% max	16–18%	Corrosion-resistant springs, marine, food-grade
1080	0.75–0.88%	—	Music wire, coil springs, spring clips
5160H	0.56–0.64%	0.7–0.9%	Heavy leaf springs, machetes, axes
9260	0.56–0.64%	—	Silicon spring steel, automotive coil springs

Safety Notes

Always wear proper PPE: heat-resistant gloves, face shield, and leather apron.
Use adequate ventilation — quenching oils produce hazardous fumes.
Never quench in water unless specifically called for — risk of cracking.
Preheat thick sections before reaching austenitizing temperature to avoid thermal shock.
Temper immediately after quenching — never let steel sit fully hardened.

How to Use This Calculator

Select your spring steel alloy from the dropdown menu.
Enter the wire or strip thickness in millimeters or inches.
Choose your temper target: spring (balanced), hard, or flexible.
Review the recommended austenitizing temperature, quench medium, and tempering range.
Check bend radius limits to ensure your design is feasible for the material thickness.
Always verify results with a test piece before processing your final workpiece.

All calculations are performed locally in your browser. No data is sent to any server. Results are for reference only — always verify with material datasheets and professional guidance.

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