Garden Products

Nickel Alloys and Stainless Steel

On its own, stainless steel is one of the most versatile metals.  When stainless steel is combined with nickel , it takes on all new properties.  These unique characteristics make nickel alloys the right choice for many jobs. 

There are a number of different kinds of nickel alloys and stainless steel  .  Each kind differs in  composition, corrosion resistance, physical properties and mechanical properties.  The following checklist will help you decide the kind of nickel alloy that is best for your project:

• Corrosion Resistance
• Oxidation and Sulfide Resistance
• Strength and Ductility at Service and Ambient Temperatures
• Suitability for Intended Fabrication Techniques
• Suitability for Intended Cleaning Procedures
• Property Stability in Service
• Toughness
• Abrasion and Erosion Resistance
• Galling and Seizing Resistance
• Reflectivity
• Magnetic Properties
• Thermal Conductivity
• Thermal Expansion
• Electrical Resistivity
• Sharpness and Retention of Cutting Edge
• Rigidity
• Dimensional Stability

 

While all of these characteristics are important, three deserve  more attention and explanation: corrosion resistance, mechanical properties as well as fabrication and cleaning requirements .

One of the most important properties of nickel alloys
 is corrosion resistance .  While general corrosion to natural conditions is easy to measure, it is a less serious concern than localized corrosion.  Stress corrosion cracking, crevice corrosion, pitting attacks and intergranular corrosion in sensitized materials (i.e. weld heat) are more important  concerns.  Localized corrosion can cause catastrophic failures and must be carefully considered during the design process.  The likelihood of a corrosive attack can be increased by impurities in the metals.  This can be difficult to anticipate, especially when a small amount of impurities can cause serious problems.  These attacks are more prevalent when the metal alloys are brought to high temperatures.

 Mechanical properties contribute to the stainless steel and nickel alloys performance  at service temperature as well as at other temperatures.  This is one characteristic that is likely overlooked.  For example, metal alloys in an arctic service product must perform at sub-zero temperatures and remain in a steady state at higher operating temperatures.  Meanwhile, the product may be brought to room temperature, and the metals still need to perform well.  This is especially important if the machinery is periodically shut down and brought to room temperature. 

  The two most common overlooked properties are fabrication and cleaning requirements  .  In most  cases, nickel alloys are chosen for their variety of beautiful finishes.  At this time, the selection of stainless steel sheets or stainless steel plates is made purely for appearance and ease of cleaning.  Ease of cleaning is not as simple as some may think.  It is advisable to test available finishes and make a selection based on finish, grade and durability.  Most corrosion resistant finishes on nickel alloys will stay bright, even in a corrosive environment which would dull a lower quality allow steel. 

 Choosing the right metal alloys for your job is important to ensure success.  Stainless steel and nickel alloys offer a wide variety of unique characteristics to support a multitude of needs.  From corrosion resistance and mechanical properties to fabrication and cleaning requirements, nickel alloys can fulfill just about any metal need. 

Copper Gutters – A Practical And Eye Catching Solution

For those people looking for rainwater systems, it is often the case that copper gutters will stand out from the crowd due to their visual appeal. It goes without saying that many different materials, such as zinc and aluminium, are used in the construction of rainwater systems but it is copper gutters which are often the first choice – and it’s easy to see why.

When you understand the benefits of copper gutters, it is clearly apparent that their level of performance is second to none and they are rightly considered one of the most efficient forms of rainwater system. Safe to say, you are unlikely to find more durable and resilient rainwater systems than copper gutters and they are excellent at standing up to the elements that the UK has to offer.

The Appeal Of Copper Gutters In The UK

Copper gutters are such an impressive form of guttering that any home that opts for this type of rainwater system never regrets it. Needless to say, there are many different materials used in the construction of rainwater systems, such as GRP, aluminium and cast iron and each will have their merits but many feel that copper gutters are just unbeatable.

As a material, copper is unquestionably one of the best suited for use in building gutters because it is extremely durable and visually appealing. If you are looking for rainwater systems that will last a long time, you will certainly find this with copper gutters because they are ideally suited to withstanding even the harshest of weather conditions.

For any homeowner wanting to implement new rainwater systems, a little research will go a long way and taking a look at the merits of zinc, aluminium, cast iron and copper gutters will allow you to make an informed decision on which is right for you. Preventing damage to roofs and brickwork by taking water away from the exterior of a property is, of course, the principal role of rainwater systems and choosing which material fits best with your property is an important decision.

Attic Ventilation Needs For Your Home

Most people look at roofing and attic ventilation and scratch their head. Ventilation cannot be determined correctly without using proper ratio’s for intake and exhaust. A factory trained contractor will know these formulas based on charts that are provided NRCA or other Trade Associations. Homes are sealed up much more these days as a result of green building technology.

Proper attic ventilation systems allows a continual flow of outside air through the entire attic in your home while protecting the efficiency of the insulation and helping to lower temperatures in the living area. House ventilation is perhaps the most misunderstood area of roofing. You need ventilation for the life of roof. Used to a long time ago, homes would ventilate themselves, heat and moisture used to escape through old windows, doors, and even right through the walls. New materials today seal in buildings.
 
Using insulation, new high-tech materials, with high-tech installation methods, seal off a building. Vapor barriers, non-breathing materials, and further seal off the buildings. Vinyl siding with insulation traps moisture in structure. High-tech windows whether vinyl or wood, modern windows let very little air in or out of a structure.

Ventilation is used to reduce heat, excessive attic heat can do damage to the roof. Attics can heat up to 165F or more. This heat radiates into your home, overhead attics mean overheated homes. Overheated homes cost homeowners thousands of dollars in air conditioning. Attic heat can damage wood frames making attics subject to structural woodwork to warping and cracking. Excess heat can also make a structure peel the exterior paints.

Overheated roof decks can reach over 170F. Heat can reduce shingle life; overheated roof decks can actually “cook” roofing materials, reducing their effectiveness. This can affect the shingle’s performance. Most major shingle manufacturers including GAF-Elk require ventilation meeting FHA minimum requirements.

Moisture builds up in all structures. Moisture sources include showers, baths, and washing. Cooking and cleaning, not to mention heating and cooling systems. This moisture can turn into vapor; some gets locked into the building. Some moisture can travel through the ceilings, once airborne; it will migrate through ceilings using natural convection. In most structures, this moisture stops at the roof deck, condenses on the deck, changes from vapor to water then settles on the interior of the deck and on cold attic surfaces which then drips onto dry insulation.

Trapped moisture will damage woodwork in attics. Plywood will delaminate and rot away. OSB will expand and rot. Structural frames will warp and rot. Excess moisture will drip down onto insulation and reduce its effectiveness. Attic moisture can lead to mold and mildew problems throughout the entire structure.

Every home should have adequate moisture ventilation in the attic and roofing system. This will keep the roof in good shape and keep your family safe also.

To find out more about how to install asphalt roofing products please visit the following links: Douglasville Construction Companies or Atlanta Remodeling Contractor.This article was Authored and Submitted by Joseph Vann Hamby. All editing and summaries are Authored by Joseph Vann Hamby in a collective effort to encourage proper roofing and home ventilation installation practices.