QSn4-0.3 Tin bronze
Grade: QSn4-0.3
Standard: GB/T 4423-1992
Features and scope of application:
Qsn4-0.3 tin bronze has high mechanical properties, corrosion resistance and high elasticity. It can withstand pressure machining well in cold state and can also be processed under pressure in hot state. Qsn4-0.3 is used to make all kinds of pressure gauge tube
QSn4-0.3 has high mechanical properties, corrosion resistance and elasticity, can bear pressure processing in cold state, also can carry out pressure processing in hot state.
QSn4-0.3 Alloy grade | |
| Lion standard | Qsn4-0.3 |
| China standard | QSn4-0.3 |
| American standard | C51100 |
| Japanese standard | C5101 |
| |
Sn | 3.5-4.9 |
P | 0.03-0.35 |
With | margin |
Sum of impurities | ≤ 0.95 |
| ||
≥ 16 | %IACS | |
Conductivity | ≥ 9.28 | MS/m |
Thermal conductivity | 84 | W/(m.K) |
Thermal expansion coefficient | 17.8 | 10 -6 / K |
Density | 8.86 | g/cm3 |
Elastic Modulus | 110 | GPa |
specific heat capacity | 0.380 _ | J/(g.K) |
Poisson’s ratio | 0.33 | — |
| |
Cold workability | Excellent |
Machinability | Generally |
Electroplating | Excellent |
Hot-dip tinning | Excellent |
Solderability | Excellent |
Resistance welding | Generally |
Typical use
Widely used in bridge support plates, clutch friction plates, connectors , diaphragms, fuse clips, fasteners, lock washers, springs, switch parts, terminals, chemical equipment components, porous sheets, textile machinery, etc.
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State | Tensile Strength ( MPa ) | Elongation ( A 11.3 , % ) | Vickers hardness | |
M | O60 | 275-380 | ≥ 40 | 70-100 |
Y2 | H02 | 380-485 | 15 | 90-165 |
AND | H04 | 495-600 | 8 | 145-190 |
T | H06 | 580-685 | 3 | 170-210 |
TY | H08 | 625-725 | – | 180-220 |
CTY | H10 | 660-750 | – | 190-240 |
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Thickness ( mm ) | 0.08-0.15 | >0.15-0.20 | >0.20-0.30 | >0.3-0.4 | >0.4-0.6 | >0.6-0.8 |
Tolerance ( mm ) | ± 0.0025 | ± 0.004 | ± 0.005 | ± 0.0075 | ± 0.01 | ± 0.0125 |
Thickness ( mm ) | >0.8-1.2 | >1.2-1.5 | >1.5-2.0 | >2.0-2.6 | >2.6-3.0 | >3.0-4.0 |
Tolerance ( mm ) | ± 0.015 | ± 0.02 | ± 0.025 | ± 0.03 | ± 0.04 | ± 0.05 |
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Thickness ( mm ) | 0.08-0.5 | >0.5-1.0 | >1.0-1.8 | >1.8-3.0 | >3.0-4.0 | |
Width and Tolerance （mm） | 5-50 | ± 0.05 | ± 0.08 | ± 0.1 | ± 0.2 | ± 0.3 |
50-100 | ± 0.075 | ± 0.1 | ± 0.15 | ± 0.2 | ± 0.3 | |
> 100 | ± 0.1 | ± 0.15 | ± 0.2 | ± 0.3 | ± 0.5 |
| |
Thickness ( mm ) | Edge Burr ( mm ), no greater than |
≤ 0.50 | 0.02 |
>0.50-1.0 | 0.04 |
>1.0-2.0 | 0.05 |
>2.0-4.0 | 0.1 |
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condition | Minimum Bend Inside Radius ( mm ) | |||
Thickness /t : 0.15-0.30mm | Thickness /t : 0.30-1.0mm | |||
good direction | bad direction | good direction | bad direction | |
O60 | 0 × t | 0 × t | 0 × t | 0 × t |
H02 | 0 × t | 0 × t | 0 × t | 0 × t |
H04 | 0 × t | 0 × t | 0 × t | 0.5 × t |
H06 | 1.0 × t | 4.0 × t | 1.5 × t | 5.0 × t |
H08 | – | – | – | – |
H10 | – | – | – | – |
| |
Ra （μ m ） | ≤ 0.3 |
Side curvature h ( mm/m ) | |||
| Width ( mm ) | Thickness ( mm ) | ||
0.08-0.6 | >0.6-2.0 | >2.0-4.0 | |
≤ 9 | ≤ 1.0 | ≤ 1.0 | — |
>9-13 | ≤ 1.0 | ≤ 1.0 | — |
>13-25 | ≤ 1.0 | ≤ 1.0 | — |
>25-50 | ≤ 1.5 | ≤ 1.0 | — |
>50-100 | ≤ 1.5 | ≤ 1.5 | — |
>100-625 | ≤ 1.5 | ≤ 1.5 | — |
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Width L ( mm ) | ≤ 50 | >50-200 | >200-625 |
Transverse curvature h ( mm ), not more than | 0.01 × L | 0.015 × L | 0.02 × L |
Longitudinal flatness (serpentine) | ||
Width ( mm ) | ≤ 100 | >100-625 |
Longitudinal straightness h ( mm/m ) | ≤ 3 | ≤ 5 |
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Width ( mm ) | ≤ 30 | >30-100 | >100-625 |
Torsion (°) | ≤ 10 | ≤ 5 | — |
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Width ( mm ) | ≤ 100 | >100-300 | >300-625 |
Warpage h ( mm/m ) | ≤ 50 | ≤ 100 | — |
