What hardness should lead bullets be?
| Type Metal | Tin | Hardness |
|---|---|---|
| Lead | — | 5 |
| Tin | 100 | 7 |
| Antimony | — | 50 |
| As an example: the solidification of a nominally .357″ diameter bullet cast of Linotype could be expected from the above table to be .0065 X .357″ = .0025″. In a soft alloy of lead and tin, .01 X .357″ = .0035″. |
What is the Brinell hardness of lead?
5.0 HB
Common values
| Material | Hardness |
|---|---|
| Hardwood | 2.6–7.0 HBS 10/100 |
| Lead | 5.0 HB (pure lead; alloyed lead typically can range from 5.0 HB to values in excess of 22.0 HB) |
| Pure Aluminium | 15 HB |
| Copper | 35 HB |
What is the hardness of lead wheel weights?
As pure lead is taken to be ~ 5 BHN and ‘clip on’ wheel weight ~ 12 BHN (average from table 1.) we are left with a huge different in hardness and it is this factor of hardness which dictates the alloys ability to withstand pressure and velocity.
What is the Brinell hardness of Linotype?
The Brinell Hardness of this Linotype alloy is about 22.
What cast lead bullets?
A cast bullet is made by allowing molten metal to solidify in a mold. Most cast bullets are made of lead alloyed with tin and antimony; but zinc alloys have been used when lead is scarce, and may be used again in response to concerns about lead toxicity.
How much does lead shrink when cast?
If you post the general dimensions of your appendage, I can tell you how much shrinkage to expect. The avarage rule for lead casting is about 1/64th in length, which is about an inch across 10′.
What is the Brinell hardness of antimony?
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Modulus of elasticity | 77.759 GPa | 11278 ksi |
| Shear modulus | 19 GPa | 2760 ksi |
| Hardness, Brinell | 30 – 58 | 30 – 58 |
| Hardness, Vickers | 30 – 60 | 30 – 60 |
What is #2 alloy?
Hardball Bullet Casting Alloy consists of 2% tin, 6% antimony and 92% lead. This modern version of the old Lyman #2 is an excellent all-around alloy for most handgun bullets and many higher velocity…
What are modern wheel weights made of?
Today, the three most common types of wheel weights in use are made from lead, steel or zinc, and are offered in adhesive or clip-on forms. When deciding which one to use, state regulations, environmental factors, material cost and product fitment are a few factors that play a role.
What is antimony lead?
Definition of antimonial lead : lead containing antimony specifically : a hard alloy of lead containing 4 to 10 percent antimony used for the framework of storage-battery plates and tank linings — compare grid metal, hard lead.
Are cast bullets accurate?
A hard-cast bullet has a BHN of 20-25, which is really hard for cast slugs. Most measure around 14-18 BHN. The softer lead bullet needs to fill the bore diameter to avoid stripping the rifling, for optimal accuracy. Using softer alloy will help by bumping up in size when fired, but limits overall velocity.
What is the Brinell hardness of a cast bullet?
The reason is basically that the large manufacturers, for ease of production, use a standard alloy for all of their cast bullet construction, an alloy which has a Brinell Hardness Number of approximately 24.
What is the Brinell hardness of lead and antimony?
For every 1% additional tin, Brinell hardness increases 0.3. For every 1% additional antimony, Brinell hardness increases 0.9. Knowing what your lead alloy is to start with]
What happens if you add tin to lead bullets?
Lead Bullet Hardness. To increase the hardness, other metals are added to lead to form a lead alloy. Adding tin will make lead slightly harder, but a lot of tin must be added to significantly increase the hardness, and this has two adverse effects. The bullets become too expensive and too light.
How do you increase the hardness of a lead bullet?
Often, it’s as simple as melting wheel weight lead and casting bullets, or casting them into a water bath to increase the hardness. Lead bullets in rifles are actually very accurate, but more careful attention to lead hardness is needed to produce the best possible accuracy.