Phosphor Bronze (QSn4-0.3) Springs Reference Data

Phosphor Bronze (QSn4-0.3) Spring Material Reference Data: 85 catalog-backed reference configurations are available for sizing review. Use the ranges below to compare the starting envelope before submitting a drawing for final quotation.

Wire diameter: 0.15-12 mm (0.0059-0.4724 in)
Outside diameter: 1.2-178.43 mm (0.0472-7.0248 in)
Inside diameter: 0.8-154.43 mm (0.0315-6.0799 in)
Free length: 1.01-403.62 mm (0.0398-15.8906 in)
Spring rate: 0.003-485.383 N/mm
Maximum load: 0.01-45577.42 N

Catalog rows are reference configurations for custom design review. Final dimensions, loads, tolerances and material certifications are confirmed during quotation.

Products Represented in This Data

These rows show which product designs are represented in the reference data. Open the matching product for geometry, quotation inputs, application guidance and RFQ details.

Conical Compression Springs12 matching rowsConical Compression Springs Application Guide
Custom-Shaped Springs1 matching rowCustom-Shaped Springs Application Guide
Cylindrical Compression Springs9 matching rowsCylindrical Compression Springs Application Guide
Double-Leg Torsion Springs4 matching rowsDouble-Leg Torsion Springs Application Guide
English-Hook Extension Springs5 matching rowsEnglish-Hook Extension Springs Application Guide
German-Hook Extension Springs5 matching rowsGerman-Hook Extension Springs Application Guide
Hairpin Springs1 matching rowHairpin Springs Application Guide
Offset-Hook Extension Springs2 matching rowsOffset-Hook Extension Springs Application Guide
Round-Hook Extension Springs3 matching rowsRound-Hook Extension Springs Application Guide
Single-Leg Torsion Springs6 matching rowsSingle-Leg Torsion Springs Application Guide
Straight-Leg Torsion Springs9 matching rowsStraight-Leg Torsion Springs Application Guide
Torsion Bar Springs4 matching rowsTorsion Bar Springs Application Guide

Engineering Material Reference

Phosphor Bronze (QSn4-0.3) is included here as an engineering material reference. This page summarizes published material properties and shows catalog-backed spring rows when they exist.

Primary grade	UNS C51000
Standards	ASTM B159 wire; ASTM B103 strip; UNS C51000
Corrosion behavior	good atmospheric corrosion resistance with useful electrical conductivity for contact and grounding springs
Temperature note	screening range -100 to 120 C, to be confirmed against final stress and environment
Tensile strength	500-1000 MPa
Elastic modulus	110-117 GPa
Shear modulus	41-44 GPa
Density	8.86 g/cm3

Matching Reference Configurations

Model	Product	Wire / thickness	OD	ID	Free length	Rate (N/mm)	Material	Max load (N)
SE-015-0022-0045-0551	Round-Hook Extension Springs	0.15 mm	2.22 mm	1.92 mm	4.48 mm	0.013	Phosphor Bronze (QSn4-0.3)	0.03
SE-020-0012-0111-0444	German-Hook Extension Springs	0.2 mm	1.2 mm	0.8 mm	11.11 mm	0.21	Phosphor Bronze (QSn4-0.3)	0.92
SE-020-0019-0114-0573	English-Hook Extension Springs	0.2 mm	1.94 mm	1.54 mm	11.45 mm	0.033	Phosphor Bronze (QSn4-0.3)	0.19
SE-020-0026-0144-0479	English-Hook Extension Springs	0.2 mm	2.56 mm	2.16 mm	14.44 mm	0.011	Phosphor Bronze (QSn4-0.3)	0.06
SC-020-0036-0054-0277	Conical Compression Springs	0.2 mm	3.55 mm	3.15 mm	5.44 mm	0.011	Phosphor Bronze (QSn4-0.3)	0.01
SE-030-0026-0128-0475	German-Hook Extension Springs	0.3 mm	2.63 mm	2.03 mm	12.85 mm	0.106	Phosphor Bronze (QSn4-0.3)	0.49
SC-030-0029-0059-0177	Conical Compression Springs	0.3 mm	2.86 mm	2.26 mm	5.94 mm	0.179	Phosphor Bronze (QSn4-0.3)	0.17
SE-030-0035-0118-0429	English-Hook Extension Springs	0.3 mm	3.5 mm	2.9 mm	11.76 mm	0.043	Phosphor Bronze (QSn4-0.3)	0.17
SW-030-0036-0668-0784	Torsion Bar Springs	0.3 mm	3.57 mm	2.97 mm	66.84 mm	0.339	Phosphor Bronze (QSn4-0.3)	5.47
ST-030-0043-0052-0663	Double-Leg Torsion Springs	0.3 mm	4.33 mm	3.73 mm	5.17 mm	0.003	Phosphor Bronze (QSn4-0.3)	0.22
SC-030-0049-0034-0053	Variable-Diameter Compression Springs	0.3 mm	4.87 mm	4.27 mm	3.4 mm	0.069	Phosphor Bronze (QSn4-0.3)	0.07
ST-030-0050-0010-0621	Double-Leg Torsion Springs	0.3 mm	4.98 mm	4.38 mm	1.01 mm	0.015	Phosphor Bronze (QSn4-0.3)	2.13
SW-030-0074-0583-0747	Torsion Bar Springs	0.3 mm	7.39 mm	6.79 mm	58.33 mm	0.033	Phosphor Bronze (QSn4-0.3)	0.57
SW-030-0105-0766-0733	Torsion Bar Springs	0.3 mm	10.48 mm	9.88 mm	76.62 mm	0.013	Phosphor Bronze (QSn4-0.3)	0.18
SC-040-0039-0163-0374	Tower-Shaped Compression Springs	0.4 mm	3.91 mm	3.11 mm	16.26 mm	0.125	Phosphor Bronze (QSn4-0.3)	0.47
ST-040-0048-0038-0645	Straight-Leg Torsion Springs	0.4 mm	4.77 mm	3.97 mm	3.79 mm	0.019	Phosphor Bronze (QSn4-0.3)	1.13
ST-040-0061-0050-0648	Double-Leg Torsion Springs	0.4 mm	6.06 mm	5.26 mm	5.04 mm	0.011	Phosphor Bronze (QSn4-0.3)	0.89
ST-040-0071-0073-0720	Single-Leg Torsion Springs	0.4 mm	7.14 mm	6.34 mm	7.26 mm	0.006	Phosphor Bronze (QSn4-0.3)	0.58
SC-040-0072-0060-0349	Tower-Shaped Compression Springs	0.4 mm	7.24 mm	6.44 mm	6 mm	0.034	Phosphor Bronze (QSn4-0.3)	0.02
SE-050-0047-0312-0425	German-Hook Extension Springs	0.5 mm	4.66 mm	3.66 mm	31.25 mm	0.083	Phosphor Bronze (QSn4-0.3)	0.74
SE-050-0052-0282-0581	German-Hook Extension Springs	0.5 mm	5.2 mm	4.2 mm	28.16 mm	0.068	Phosphor Bronze (QSn4-0.3)	0.6
SE-050-0052-0208-0463	English-Hook Extension Springs	0.5 mm	5.22 mm	4.22 mm	20.8 mm	0.097	Phosphor Bronze (QSn4-0.3)	0.46
SC-050-0074-0069-0302	Cylindrical Compression Springs	0.5 mm	7.36 mm	6.36 mm	6.89 mm	0.102	Phosphor Bronze (QSn4-0.3)	0.13
ST-060-0034-0109-0661	Single-Leg Torsion Springs	0.6 mm	3.37 mm	2.17 mm	10.9 mm	0.076	Phosphor Bronze (QSn4-0.3)	12.79
SC-060-0039-0091-0351	Cylindrical Compression Springs	0.6 mm	3.87 mm	2.67 mm	9.1 mm	1.979	Phosphor Bronze (QSn4-0.3)	3.46
SE-060-0044-0410-0509	English-Hook Extension Springs	0.6 mm	4.45 mm	3.25 mm	40.97 mm	0.206	Phosphor Bronze (QSn4-0.3)	2.56
SC-060-0045-0160-0298	Tower-Shaped Compression Springs	0.6 mm	4.46 mm	3.26 mm	16.05 mm	0.635	Phosphor Bronze (QSn4-0.3)	1.74
SC-060-0055-0176-0213	Cylindrical Compression Springs	0.6 mm	5.53 mm	4.33 mm	17.58 mm	0.336	Phosphor Bronze (QSn4-0.3)	1.68
SE-060-0080-0416-0495	German-Hook Extension Springs	0.6 mm	7.97 mm	6.77 mm	41.55 mm	0.03	Phosphor Bronze (QSn4-0.3)	0.25
SC-080-0064-0107-0083	Cylindrical Compression Springs	0.8 mm	6.41 mm	4.81 mm	10.74 mm	1.651	Phosphor Bronze (QSn4-0.3)	4.31
SW-080-0094-1769-0781	Hairpin Springs	0.8 mm	9.38 mm	7.78 mm	176.9 mm	0.339	Phosphor Bronze (QSn4-0.3)	16.02
SW-080-0101-0438-0780	Torsion Bar Springs	0.8 mm	10.14 mm	8.54 mm	43.75 mm	0.274	Phosphor Bronze (QSn4-0.3)	1.96

Using This Material Data

forming, age hardening or stress relief may be required; plating is often selected for contact resistance and solderability

Need to choose between grades? Material selection belongs in the Materials section rather than this data page. Open Copper Alloy Spring Materials →

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Spring Requirements

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Notes

Frequently Asked Questions

Can CustomSprings manufacture springs in Phosphor Bronze (QSn4-0.3)?

The material is included in the CustomSprings material library for RFQ screening. Final feasibility depends on wire or strip form, size, heat treatment, load, environment and quantity.

Does the material page guarantee certified properties?

No. The material values are engineering reference data. Certified properties or test reports must be specified during production quotation.

What if there are no matching reference rows?

Use the RFQ form with your drawing and application data. The material can still be reviewed as a made-to-drawing option.