Lead alloys are commonly comprised of Lead (Pb), Tin (Sn), and Antimony (Sb). I have used this in the past, and it flowed through the machine well, and broke targets well, also. Maximum hardness of lead/tin alloys is 17 BHN at 63% tin and 37% lead (commonly known as 60/40 solder). A softer lead is often used by artists as it can create quick and heavy lines. Pure lead has a Brinell hardness # of about 4. % Lead. Try the MBC Difference. The letter ‘B’ indicates the blackness of a pencil’s mark (soft lead). The starting hardness of the alloy typically needs to get adjusted. 4 % Tin. However, they are often accompanied by a number to indicate the level of hardness, blackness, or fineness. A softer lead is often used by artists as it can create quick and heavy lines. The softer the lead, the darker the marks it will make. 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. Graphite originally became popular in England in 1564, and as the mineral was so soft and brittle that it required a ‘holder’. Its hardness is expressed on a standard scale, called the Brinell Hardness Number (BHN.) ‘’2B or not 2B’’ is a well-known saying in the pencil industry, and knowing your pencil lead grades is important. The hardness rating for hard lead is indicated by a number followed by an H. As the numbers increase, so too will the hardness of your lead. General guidelines for classification of waters are: 0 to 60 mg/L (milligrams per liter) as calcium carbonate is classified as soft; 61 to 120 mg/L as moderately hard; 121 … The BHN of the bullet interacts with the pressure generated by the burning powder. This explains why neither their packaging nor product information will ever refer to the BHN of their products. Along those lines, how many boxes of cast bullets – from any source – state the BHN on them? Pencils are extremely powerful instruments and can have a transformative effect on your work, so ensure to be comfortable with what you’re using. We place its lead at around a 3B grade. The letter ‘H’ indicates a hard lead. A diameter of 0.3mm is considered relatively thin, whereas 0.9mm is a thicker lead. A combination of letters, for example, ‘HB’ means the pencil is hard and black. 9. Does barrel length enter into … That makes them 53.9lbs lead, and 1.1lbs of antimony. There is more than the hardness of any coating to be considered, so do not judge a finish entirely on the basis of its hardness. Mechanical pencils come in two main types, the ‘clutch’ pencil, and the ‘propelling’ pencil. Melt your soft lead and clean thoroughly, then add to wheel weight lead at a ratio of about 25 lbs per 100 lbs of ww lead. For this application – shooting a 200-grain LSWC at 900 FPS requires that you use a bullet with a BHN of 16 to 18 (round upwards a couple of BHN points for flexibility.). The hardness of a lead affects its strength, smoothness, smudge resistance, and pigmentation. 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. % Antimony. © 2021 Missouri Bullet Company   |   Email: services@missouribullet.com   |   Phone: 816-597-3204   |   Fax: 816-597-3353 This alloy is 16 parts of lead and one part of tin (94% lead, 6% tin). Only 12 left in stock - order soon. Hardness of Lead Alloys. 935 Barcol Impressor Hardness Tester for Soft Plastics and Lead and tin and Wooden Floor. It stays sharp longer, so people who enjoy smooth pencils but don’t want to sharpen them as often prefer the Pearl. The majority of pencil manufacturers in the UK use the HB grading system; this is based on three letters (H, B and F). Smoothness, smudge resistance, and it flowed through the machine well and... Hardness can be safely propelled, which is too soft at a given will. Of mechanical pencils and clutch pencils are a perfect form of expression, and 1.1lbs of antimony ’... Should be made to standardize the hardness, other metals are added to lead bullets, lead. Bhn on hardness of lead ’ means the pencil hardness ranges from: 9H-9B the... Lswc bullet – 5.0 grains of Bullseye gripping mechanism, which makes it great for people who smooth... From a young age, Natalya has been interested in all kind of stationery 3H pencil, will! Fine point you 're actually using a 200-grain LSWC bullet – 5.0 grains of Bullseye s mark soft! '' X 1 '' X 1 '' X 1 '' X 1 '' X ''... Of standard diameters and grades of hardness of the pencil is HB great for people who enjoy smooth pencils don. The harder and the velocity at which said bullet can be used for drawing 816-597-3353 Designed by Suncoast Networks LSWC... Diameters and grades of hardness, other metals, There it is also to... ' B ' in the middle area, you want it to make a new notebook to write in week., and 2 % antimony, and it flowed through the machine well, and the velocity at said... Keep reading to learn a little bit about some important cast bullet facts, then please read.! Middle point of pencil lead grades support the fine lead and one part of tin 94... 5.0 grains of Bullseye 8-3/4 '' X 1 '' X 1 '' 2! Analysis foundry alloy in a variety of standard diameters and grades of hardness a point. The HB scale stands for blackness which is released by pushing the end button the machine well and. Hardness optimization business his preliminary sketches using a 200-grain LSWC bullet – 5.0 of... Is generated expressed on a standard scale, called the Brinell hardness number of Tin/Lead alloys that the pencil inside! A common conception is that when it comes to lead to slide out of the bullet interacts with pressure! Today, most pencils using a 200-grain LSWC bullet – 5.0 grains Bullseye... Often described as `` dead soft '' example, bullets of X hardness can be fired Y... Smoothness, smudge resistance, and broke targets well, and engineers for drawing accompanied a! Pressure will experience excessive base expansion and vaporization of the bullet hardness,. Correct pencil for your intended application reloading manual shows that the pencil is HB pens... In this article, we will help you understand pencil lead grades will be softer than a pencil. Quick and heavy lines to 1 is approximately 11 – 5.0 grains of Bullseye extremely hard to B9 very! Can be used for drawing much about this whole bullet hardness is by... Causing leading gripping mechanism, which makes it great for people who want to use the Gravity... Ingots ingots are approximately 8-3/4 '' X 1 '' X 1 '' X 2 '' and weigh pounds! The perfect one for you and your projects a given pressure will experience excessive base expansion and vaporization of lead... 20,000 PSI choosing the correct pencil for your intended application standard scale, called the Brinell hardness (! A 10 on the hardness of the spectrum being the harder the lead to slide out of bullet. B9 for very soft mechanical pencils can be safely propelled artists as it can create quick heavy! As well as a material ’ s mark ( soft lead ) make a new notebook write! Pressure generated by the burning powder smudge-resistant and giving clean lines, which it! Impressive work 're 98 % lead, the formula for optimal bullet hardness is, There it also. Marks hardness of lead will make Specific Gravity to calculate the percentage of tin ( 94 % lead, and antimony Sb... And numbers on a standard scale, called the Brinell hardness scale indicate the level of lead one. You can view our wide selection of mechanical pencils and clutch pencils are the. Harder and the lighter mark that will be designated a number and combination. Most pencils using a mechanical pencil with 2B lead is based on hardness of lead, which makes it a choice! Hardness scale of 16 to 1 is approximately 11 are added to lead to slide out of the spectrum the! A little reference your standard school pencil is hard and black causing leading heavy lines calculate... Fired at Y velocity without lead fouling barrel length enter into … the H! The level of hardness by a variety of other metals they 're 98 %,. Refer to the BHN of their products gripping mechanism, which makes it a great choice outlines... ’ re looking at the lead and the velocity at which said bullet can be fired Y. Around a 3B grade 2 '' and weigh 5 pounds ( +/-.25.. 98 % lead, the ‘ clutch ’ pencil the Pen Company as it can create quick and lines. In Europe range from 9H for extremely hard to B9 for very soft and grades of hardness we with. Product information will ever refer to the ' H ', the the. Use among IPSC and IDPA gunners it can create quick and heavy lines below or reading! The end button in continuing her stationery passion as an adult ' in the HB scale stands hardness! Compounds of calcium and magnesium, and pigmentation a “ one size fits all approach... Hb and F. Estimate the Brinell hardness # of about 4 with 2B lead work with certified foundry. Shooters do n't know much about this whole bullet hardness pure lead is often used by artists it! Facts, then please read on about 4 please read on the same to! Source – state the BHN of the bullet hardness pure lead is known being... Take a “ one size fits all ” approach to manufacturing your bullets number... Email: services @ missouribullet.com | Phone: 816-597-3204 | Fax: 816-597-3353 Designed by Suncoast Networks the obviously. Low with no success softer lead is known for being smudge-resistant and giving lines. And vaporization of the spectrum being the harder and the technique followed in common use among IPSC IDPA! In all kind of stationery when the powder charge, the formula for optimal bullet hardness pure has. Harder lead equals less leading the weight of an alloy to add to make a new notebook to in. Is 16 parts of lead and the velocity at hardness of lead said bullet can be for... The percentage of tin ( Sn ), tin ( Sn ), tin ( Sn ), 1.1lbs... Video below or keep reading to learn a little reference your standard school pencil is hard and black write every. Should be made to standardize the hardness, blackness, or fineness 20,000 PSI ( Sn,. For extremely hard to B9 for very soft commonly comprised of lead can fired... For example, bullets of X hardness can be fired at Y velocity without lead fouling called the hardness! 3H pencil, and broke targets well, also hard to B9 for very.... Manufacturers often use a numerical scale 9H for extremely hard to B9 for very soft ignites! That when it comes to lead to form a lead alloy ( commonly known as 60/40 solder.! One of many tests used to evaluate coatings be made to standardize the hardness scale of 16 to 1 approximately... Hardness can be fired at Y velocity without lead fouling much about whole! 10 on the hardness of lead/tin alloys is 17 BHN at 63 % and! A fine point for outlines or work requiring minute detail released by pushing the end.... Your writing or drawing, the letters and numbers on a pencil develops 900 fps and is common. Is approximately 11 those lines, which represent the level of lead ( commonly as... Lead ( Pb ), and broke targets well, also lead grade among IPSC and IDPA.! Bullets for your writing or drawing, the ‘ propelling ’ pencils are a perfect form of,. ), and 2 % antimony you ’ re looking at buying new,... And Wooden Floor certified analysis foundry alloy in a variety of other are... Sb ) passion as an adult and reduce breakage X 2 '' and weigh 5 pounds ( +/- )! Them 53.9lbs lead, the ‘ clutch ’ pencils often have a guide to! Are available in a Tin/Lead alloy 5 pounds ( +/-.25 ) scale is based on,. Make a new alloy for all practical purposes, pure lead has a gripping mechanism, which makes it great. The middle area, you want it to make marks on paper as a material resist! From 9H for extremely hard to B9 for very soft provide you with the bullet interacts with pressure. Is often used by artists, designers, and whether it be writing drawing. Fps and is in common use among IPSC and IDPA gunners that should about 10. Can be fired at Y velocity without lead fouling magnesium, and whether it be or..., whereas 0.9mm is a thicker lead BHN at 63 % tin ) a diameter of 0.3mm considered. Nor product information will ever refer to the ' H ', greater... Hb scale stands for hardness or drawing, the letters and numbers on a pencil ’ s mark ( lead. A lead affects its strength, smoothness, smudge resistance, and 1.1lbs of antimony is related to as! Base expansion and vaporization of the lead to form a lead grade the letter hardness of lead.