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mechanical properties testing

mechanical properties of materials refer to the mechanical characteristics of materials when subjected to various applied loads (tensile, compression, bending, torsion, impact, alternating stress, etc.) under different environments (temperature, media, humidity).

mechanical property testing is used as a key element in the evaluation of material properties in industries such as textile and apparel, shoes and bags, building materials, electronics and electrical appliances, industrial manufacturing, aerospace, rail transportation, automobiles and parts, and medical devices. through mechanical property testing, we can grasp its use performance, so as to achieve the best economy; mechanical property is also the main basis for mechanical parts design and material selection, so as to provide guidance for product optimization design and scheme; mechanical property is also the key parameter to evaluate whether the material meets the corresponding standard requirements and protect the interests of customers in trade; mechanical property testing is also the key data for production process quality control and new material mechanical properties are also key data for quality control of production process and research and development of new materials.

noa has the capability of physical testing of various polymer materials, including density, hardness, tensile, bending, impact, compression, dsc, tga, melt flow rate, low temperature embrittlement, heat deflection temperature, vicat softening temperature, ash content, etc. its testing methods cover the requirements of international standards (iso), national standards (gb) and other standards, for the range of objects including pc, abs, pp, pe, ldpe and hdpe, ldpe and hdpe and other materials. we can also provide a series of tests to identify and test the performance and process performance of metallic and non-metallic materials. the tests can help customers evaluate the mechanical properties of materials and identify weaknesses in the use of materials.

noa has a central laboratory of 30,000m² and has obtained cma and cnas qualification. through experienced technicians, we provide detailed technical consulting solutions and offer a variety of complete test experiments to ensure accurate and reliable test results.

service content

physical laboratory construction has mechanical properties, light aging resistance, weather resistance, corrosion resistance, thermal properties, combustion properties experimental capabilities, to provide customers with analysis and testing services.

1. service products

service products	common products
steel materials	carbon steel, stainless steel, heat-resistant steel, alloy steel, cast iron, etc.
special metal materials	functional alloys, metal matrix composites, etc.
other metal products	profiles, plates, wires, pipes, fasteners, castings, automotive parts, machinery and components, etc.
non-ferrous metals	aluminum and aluminum alloys, copper and copper alloys, etc.
non-metallic materials	plastics, rubber, coatings, plating, adhesives, tapes, etc.

2. test items

test items	interpretation of results
tensile test	tensile strength, yield strength, specified plastic elongation strength, elongation, sectional shrinkage, modulus of elasticity, n value, r value, poisson's ratio (provide sample cross-sectional area), etc.
impact test	absorbed energy, lateral expansion value, shear section rate.
bending test	observation after bending test, the specimen bending the outer surface with or without cracks
compression test	compression strength
tube process performance test	flattening test, flaring test, rolled edge test
fastener performance test	breaking torque, hydrogen embrittlement test, tensile strength of screws and bolts.

3. testing standards

sample name	test items	test standard name and number
plastic, rubber	tensile properties	astm d638-03 iso 527-2:2012 gb/t 1040.1-2006
plastic, rubber	compression properties	gb/t 1041-2008 iso 604：2002
plastic, rubber	bending properties	astm d790-03 iso 178:2001 gb/t 9341-2000
coated parts, plated parts	tapered shaft bending	gb/t 11185-2009
coated parts, plated parts	mandrel bending	gbt 6742-2007
rubber	compression permanent deformation	qc/t 709-2004 gb/t 10653-2001 iso 1856：1980
plastic	simply supported beam impact	astm d6110-04 iso 179-2:1997 gb/t 1043.1-2008
plastic	cantilever beam impact	astm d4812-1999 iso 180:2000 gb/t 1843-2008
plastic, rubber	shore hardness	gb/t 2411-2008 astm d2240-05 iso 7619-97
plastic, rubber	melt flow rate	astm d1238-04 iso 1133:1997 gb/t 3682-2000
plastic, rubber，coated parts, plated parts	straight wear-resistant	astm f2496 gme 60248 gme 60368
plastic, rubber，coated parts, plated parts	rotational wear resistance	astm d3884 astm d1175 iso 5470-1 iso 7784-2:1997 gb/t 1768-2006 astm d4060-2014
coated parts, plated parts	pencil hardness	astm_d3363-2005 gb/t 6739-2006 iso 15184-2012
ore, glass	mohs hardness	——
color-painted parts, varnished parts	coating (color paint, varnish) adhesion	astm d3359 gb/t 9286-1998 fltm bi 106-01
plastic, rubber	bonding strength	gb/t 15254-1994 gb/t 532-2008 jis k6256-1:2013
plastic, rubber	tear strength	gb/t 529-2008 iso 34-1:2010 bs iso 34-1:2010 astm d624-00(2012)
plastic, rubber	shear strength test	gb/t 7124-2008
plastic, rubber	peel strength	gb/t 2792-2014
plastic, rubber	rockwell hardness	gb/t 3398.2 astm d785 iso 2039-2
plastic, rubber	ball pressure hardness	gb/t 3398.1 iso 2039

service process

q&a

question 1: the most commonly used equipment for mechanical experiments is the universal tensile testing machine, tensile testing machine can be used to test which experiments?

answer 1: material tensile testing machine for metal (including composite materials), rubber and plastic, adhesive materials, tensile, compression, bending, shear, peel, tear, load retention, and other static mechanical properties of the test analysis and research, with stress, strain, displacement three closed-loop control mode, the requirements can be sought out force value, tensile strength, peel strength, bending strength, compression strength, elastic modulus, elongation at break, yield strength and other parameters.

question 2: what are the common standards for metal hardness testing and what are the differences between each?

answer 2: there are two main types of test methods for metal hardness testing. one type is the static test method, and the application of test force in this type of method is slow and shockless. the determination of hardness is mainly determined by the depth of the indentation, the projected area of the indentation or the size of the indentation notch area. static test methods include brinell, rockwell, vickers, nurse, wechsler, and papertrey. among them, brinell, rockwell and vickers are the three most widely used test methods, and they are the main test methods for metal hardness testing. another type of test method is the dynamic test method, this type of method test force application is dynamic and impact. here include shore and richter hardness test methods.

question 3: the size of the permanent deformation of compression is an important indicator to measure the sealing performance and shock absorption performance of rubber products and the length of service life, what are the factors affecting the permanent deformation of vulcanized rubber compression?

answer 3: the factors affecting the compressive permanent deformation of vulcanized rubber are (1) the factors of rubber formulation, such as raw rubber species and additives species and dosage, both of which affect the cross-link density, which in turn affects the compressive permanent deformation; (2) the factors of processing, such as the dispersion of the compounding agent, the size of the cross-link bonding energy.

question 4: mechanical testing, how long after sending the sample can be issued a test report?

answer 4: the regular mechanical testing cycle is 7-10 working days, if you need to make samples or need additional aging test, you need to consider the sample making cycle and aging cycle separately.

our advantage

authoritative qualification

noa has been approved by certification and accreditation administration of the people’s republic of china（cnca）(cnca-r-2002-051), and has obtained qualification of china inspection body and laboratory mandatory approval (cma),and has passed the multiple approvals of china national accreditation service for conformity assessment (cnas), international accreditation service (ias), united kingdom accreditation service (ukas), joint accreditation system of australia and new zealand (jas-anz). noa has been approved by state administration for market regulation of china, and has been recognized as inspection and testing institution of china's special equipment, as well as the qualification of china's national equipment supervision and engineering supervision. noa-dci is the notified body of the ce directive of the european commission. noa has been recognized by the international electrotechnical commission (iecq) by obtaining electronic component quality assessment system. it is also a national inspection and assessment notified body of import and export commodity in china.noa is a high-tech enterprise in shanghai.

improve performance, realize asset value appreciation, and service throughout the entire value chain

from pre-design to post-operation, noa has the ability to guarantee the whole life cycle of the business. noa, as an independent third-party inspection company, has a large number of domestic and international standards and specifications proficient in design, welding, non-destructive testing, painting, packaging and other fields the experienced team of professional engineers and inspection experts, with more than ten years of experience in the domestic market, is familiar with all aspects of the domestic industrial equipment supply chain, and can provide you with technical support services for the full life cycle of technical services in a timely manner, combining various products. inspection, certification, testing, consulting, and auditing services can provide you with one-stop all-round comprehensive services.

quality, efficiency and service

noa has formed a mature and solid operation system in the development of more than 20 years. we let technical experts who are familiar with market regulations and testing standards and have professional industry experience to carry out inspection, evaluation and design review work. while meeting the requirements of domestic and international standards, we ensure that customers can obtain satisfactory service results in the first time with accurate time-sensitive management methods, and ensure that customers can seize the opportunity in the market competition.

service area

noa inspection services currently cover europe, australia, russia, some middle east regions and most regions in china. noa can ensure the consistency and continuity of customer service in different regions, and eliminate the impact of unfamiliar environments on customer quality. the guarantees and the impact of project implementation enable customers to participate in different markets across the country or around the world with flawless quality.

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