Solder & Low-Melting Alloy ZSnSb8-4
ZSnSb8-4 is a medium-antimony tin-base Babbitt bearing alloy to GB/T 1174, relying on SbSn and copper-tin phases in a tin matrix to carry load.
Reference datasheet — ZSnSb8-4 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the F condition
ZSnSb8-4 tempers and conditions
ZSnSb8-4 is supplied in 2 conditions, soft to hard. F is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Static (gravity) cast lining in chilled mould | Use for large, thick-walled or split bearing shells where centrifugal casting is impractical; slower cooling gives coarser structure and slightly lower hardness. | 38 | 74 | 4 | 24 HB | 8.5 % IACS |
FDefault As fabricated | Default supplied/used condition: alloy melted and poured onto a tinned steel, cast-iron or bronze shell, then bored to size. | 40 | 77 | 5 | 24 HB | 8.5 % IACS |
Supply forms, finishes and certifications
Ways ZSnSb8-4 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Ingot | Remelt ingot / bar for foundry use | Supply form |
CC | Centrifugally cast lining | Surface finish |
What is ZSnSb8-4?
ZSnSb8-4 is a medium-antimony tin-base Babbitt bearing alloy to GB/T 1174, relying on SbSn and copper-tin phases in a tin matrix to carry load. It is used for general industrial plain bearings that need good conformability and seizure resistance, and is supplied as ingot for chill, static and centrifugal casting of linings typically 1–6 mm thick. Default as-cast values are 77 MPa tensile, 40 MPa yield, 5% elongation and 24 HB, with a service ceiling near 120 °C. It cannot be arc welded and carries less load than ZSnSb11-6, which is the step up when speeds or unit pressures rise. ZSnSb8-4 has a density of 7.35 g/cm³ (0.266 lb/in³), lighter than 84% of solder & low-melting alloy grades. It melts at 241°C (466 °F). ZSnSb8-4 has a yield strength of 40 MPa (5.8 ksi) and a tensile strength of 77 MPa (11.2 ksi) — stronger than 88% of solder & low-melting alloy grades. Elongation at break is 5% and the elastic modulus is 52 GPa (7.54 Msi).
What is ZSnSb8-4 used for?
- general machinery bearings
- compressor bearings
- pump bearings
Advantages
- Stiff — 52 GPa (7.54 Msi), better than 95% of solder & low-melting alloy grades
- Polishes to a fine finish — 70/100, better than 91% of solder & low-melting alloy grades
- High strength — 40 MPa (5.8 ksi), better than 88% of solder & low-melting alloy grades
- Easy to machine — 80/100, better than 85% of solder & low-melting alloy grades
- Lightweight — 7.35 g/cm³ (0.266 lb/in³), better than 84% of solder & low-melting alloy grades
Limitations
- Limited ductility — 5%, worse than 90% of solder & low-melting alloy grades
- Limited formability — 30/100, worse than 88% of solder & low-melting alloy grades
- High embodied carbon — 20 kg CO₂/kg, worse than 86% of solder & low-melting alloy grades
ZSnSb8-4 properties
Typical room-temperature values for ZSnSb8-4-F; bars are the position among solder & low-melting alloy grades.
Physical3
ZSnSb8-4 has a density of 7.35 g/cm³ (0.266 lb/in³), lighter than 84% of solder & low-melting alloy grades. It melts at 241°C (466 °F).
Mechanical13
ZSnSb8-4 has a yield strength of 40 MPa (5.8 ksi) and a tensile strength of 77 MPa (11.2 ksi) — stronger than 88% of solder & low-melting alloy grades. Elongation at break is 5% and the elastic modulus is 52 GPa (7.54 Msi).
Thermal6
ZSnSb8-4 is rated for continuous service to 120°C (248 °F). It conducts heat at 54 W/m·K (31.2 BTU/hr·ft·°F), better than 76% of solder & low-melting alloy grades. Thermal expansion is 23 µm/m·K (12.8 µin/in·°F).
Electrical3
ZSnSb8-4 conducts electricity at 8.5 % IACS, worse than 64% of solder & low-melting alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), better than 78% of solder & low-melting alloy grades.
Sustainability4
Producing a kilogram of ZSnSb8-4 takes about 320 MJ of energy and emits 20 kg of CO₂ — more than 81% of solder & low-melting alloy grades. Typical recycled content is 30%.
Manufacturability7
ZSnSb8-4's machinability is very good (80/100, better than 85% of solder & low-melting alloy grades); weldability poor (15/100); formability poor (30/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the solder & low-melting alloy family
Yield strength against density for every solder & low-melting alloy grade FabDigit runs. ZSnSb8-4 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ZSnSb8-4
Is ZSnSb8-4 easy to machine?
Bore and face with sharp, high-rake HSS or polished carbide tools, generous rake and flood oil, high speed and light feed to avoid smearing; never use abrasives that embed in the soft matrix.
Can ZSnSb8-4 be welded?
Not arc-welded; repairs are made by re-tinning and torch/dip re-pouring, or by localized flame build-up with the same alloy at 300–350 °C using zinc-chloride flux.
Can ZSnSb8-4 be formed, bent or molded?
Pour at 440–470 °C onto a chemically cleaned and hot-tinned shell preheated to ~250–280 °C, with directional (chill from the back) solidification to avoid shrinkage voids and SbSn segregation; lining thickness typically 1–6 mm.
ZSnSb8-4 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Sbforms hard SbSn cuboids | 7 – 8 | 7.5 |
| Cuforms Cu6Sn5 needles, prevents SbSn segregation | 3 – 4 | 3.5 |
| Pbimpurity limit | ≤ 0.35 | |
| Feimpurity limit | ≤ 0.1 | |
| Asimpurity limit | ≤ 0.1 | |
| Biimpurity limit | ≤ 0.08 | |
| Alimpurity limit | ≤ 0.01 | |
| Znimpurity limit | ≤ 0.01 | |
| Sn≈88–90 %, balance | balance |
What surface finishes work on ZSnSb8-4?
Bore, then burnish or scrape-fit to the shaft; no anodizing or plating — bonding to the backing is checked by ultrasonic/tap test and dye penetrant.
Equivalent designations
Standards and trade names that resolve to Solder & Low-Melting Alloy ZSnSb8-4 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- ZChSnSb8-4
How much does ZSnSb8-4 cost?
ZSnSb8-4 is a high-cost solder & low-melting alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
ZSnSb8-4 — frequently asked
What is ZSnSb8-4 used for?
ZSnSb8-4 is typically used for general machinery bearings, compressor bearings and pump bearings. In short: balanced-cost tin Babbitt; good conformability and embeddability; general industrial bearing lining.
What is the yield strength of ZSnSb8-4?
ZSnSb8-4 has a typical yield strength of 40 MPa (5.8 ksi) and a tensile strength of 77 MPa (11.2 ksi) — stronger than 88% of solder & low-melting alloy grades. Strength varies by condition: see the 2 listed tempers.
Is ZSnSb8-4 easy to machine?
Yes — machinability is rated very good (80/100, better than 85% of solder & low-melting alloy grades). Bore and face with sharp, high-rake HSS or polished carbide tools, generous rake and flood oil, high speed and light feed to avoid smearing; never use abrasives that embed in the soft matrix.
Can ZSnSb8-4 be welded?
Not readily — weldability is rated poor (15/100). Not arc-welded; repairs are made by re-tinning and torch/dip re-pouring, or by localized flame build-up with the same alloy at 300–350 °C using zinc-chloride flux.
What surface finishes work on ZSnSb8-4?
Bore, then burnish or scrape-fit to the shaft; no anodizing or plating — bonding to the backing is checked by ultrasonic/tap test and dye penetrant.
Can ZSnSb8-4 be formed, bent or molded?
Pour at 440–470 °C onto a chemically cleaned and hot-tinned shell preheated to ~250–280 °C, with directional (chill from the back) solidification to avoid shrinkage voids and SbSn segregation; lining thickness typically 1–6 mm.
What is the maximum service temperature of ZSnSb8-4?
ZSnSb8-4 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ZSnSb8-4-F and ZSnSb8-4-SC?
F is the default condition — default supplied/used condition: alloy melted and poured onto a tinned steel, cast-iron or bronze shell, then bored to size. SC: use for large, thick-walled or split bearing shells where centrifugal casting is impractical; slower cooling gives coarser structure and slightly lower hardness. Yield strength is 40 MPa in F versus 38 MPa in SC.
How much does ZSnSb8-4 cost?
ZSnSb8-4 is a high-cost solder & low-melting alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B23 Standard Specification for White Metal Bearing Alloys — ASTM International (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 18 — Friction, Lubrication and Wear Technology — ASM International (1992)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.