Krishnashraya Brass

Quality Assurance

Krishnashraya Brass is a trusted manufacturer committed to complete customer satisfaction, backed by strong industry expertise and goodwill. Established in 2016 as Tavashmi Brass Industries, the company has earned appreciation at the domestic level for its consistent quality and reliable services. Today, operating as Krishnashraya Brass, we have expanded our operations to serve the international market. We strictly follow ISO 9001:2015 Quality Management System (QMS) standards, ensuring superior manufacturing practices, process control, and continuous improvement. Our focus on innovation, quality assurance, and customer-centric solutions makes us a dependable brass components supplier worldwide.

Equipped with advanced technology, skilled professionals, and a wide range of conventional, semi-conventional, and manually operated machinery, Krishnashraya Brass produces high-quality brass products at competitive prices. We implement modern quality control techniques at every stage—from manufacturing to packing—using calibrated instruments, gauges, and profile projectors for accurate measurements. Our products comply with international standards such as DIN, BS, ASTM, and undergo laboratory-tested material composition including CuZn39Pb3, free-cutting brass, and forging standards. We also offer specialized testing like impact, torque, hardness, humidity, and plating thickness tests through recognized mechanical laboratories. With capabilities to manufacture various threads including BA, BSF, BSW, BSP (Parallel & Taper), and Metric Threads, our robust inspection facilities ensure zero-defect brass components for global applications.

Types of Thread

BSP THREAD

British Standard Pipe (BSP) has been used in plumbing and pipe fittings and It is also known as Whitworth 55°.

There are two types of BSP Thread :

Parallel threads OR Straight threads : Parallel thread have a constant diameter.
Taper Thread : Taper thread which diameter increases or decreases along with the length of the thread.

Thread Count (TPI)

Threads Per Inch means the total number of threads per inch are measured along with the length of a fastener. TPI is only used in American fasteners. In smaller fasteners the threads are finer, so the thread count will be higher.

Size	Pitch	External Thread OD		Internal Thread ID
Inch	TPI	Mm	Inch	Mm	Inch
1/8	28	9.6	0.38	8.6	0.34
¼	19	13	0.51	11.9	0.47
3/8	19	16.5	0.65	15.2	0.6
½	14	20.8	0.82	19.1	0.75
5/8	14	22.8	0.9	20.8	0.82
¾	14	26.3	1.04	24.6	0.97
1	11	31.1	1.3	30.7	1.21
1 ¼	11	41.8	1.64	39.4	1.55
1 ½	11	47.7	1.88	45.5	1.79
2	11	59.5	2.34	57.4	2.26
2 ½	11	75.1	2.95	72.6	2.86
3	11	87.9	3.46	85.4	3.3

Thread Pitch

Thread Pitch is used in Metric fasteners which are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimeter. Smaller fasteners have finer thread so that they have lower thread pitch.

FREE CUTTING BRASS ROD

Free Cutting Brass is also known as Leaded Brass which contains 56 to 63% of Copper, 2 to 3.50% Lead and remaining of Zinc. The addition of Lead reduces wear on the cutting tool, and it permits part to be processed rapidly on automatic machines. Good strength and ductility are combined with excellent corrosion resistance. Free Cutting Brass set the standard by which the machinability of other materials is judged. The usage of Free Cutting Brass ensures cost effectiveness via application of close tolerance manufacturing techniques and reducing tooling costs. Apart from these benefits, the high value of any process scrap can be used to reduce the production costs significantly. So we are using these high quality brass rods having different grades as given below with its technical details.

Moreover, If the customer wants a product then other than free cutting brass rod then we will also provide. Either Forging Brass which makes the product economical or Naval Brass which contains Tin to increase its corrosion resistance property is specially used for seawater.

IS 319	Equivalent Specification		Copper	Lead	Iron	Zink	Other Impurities	Yield Stress	Tensile Strength	Hardness Brinell	Elonga- tion
IS 319	IS 319 GRADE 1	CZ121	Copper	Lead	Iron	Zink	Other Impurities	Yield Stress	Tensile Strength	Hardness Brinell	Elonga- tion	CW6 14N	56 to 58%	2.00 to 3.50%	0.30% Max	Balance	0.75% Max	150 MPa Min.	380 MPa Min	90 to 160 HB	18 Min
BS2874	IS 319 GRADE 1	BS249											56 to 58%	2.00 to 3.50%	0.30% Max	Balance	0.75% Max	150 MPa Min.	380 MPa Min	90 to 160 HB	18 Min
IS 319 GRADE 2	ASTM B16	CuZn36 Pb3	60 to 63%	2.50 to 3.70%	0.35% Max	Balance	0.50% Max	150 MPa Min.	325 MPa Min.	90 to 160 HB	15 Min
IS 319 GRADE 2	UNS	C36000 CW6 03N	60 to 63%	2.50 to 3.70%	0.35% Max	Balance	0.50% Max	150 MPa Min.	325 MPa Min.	90 to 160 HB	15 Min
IS 319 GRADE 3	ASTM	B16 CuZn36 Pb3	60 to 63%	0.50 to 1.50%	0.20% Max	Balance	0.50% Max	150 MPa Min.	285 MPa Min	90 to 160 HB	10 Min
IS 319 GRADE 3	UNS	C36000 CW60 3N	60 to 63%	0.50 to 1.50%	0.20% Max	Balance	0.50% Max	150 MPa Min.	285 MPa Min	90 to 160 HB	10 Min

Inspection & Testing Process

Material Composition Verification

Ensuring the correct material composition is the first step in maintaining quality. Since brass is an alloy with varying ratios of copper and zinc, along with trace elements like lead or tin, even small deviations can affect the component’s properties.

Spectroscopy Analysis: Techniques like X-ray Fluorescence (XRF) and Optical Emission Spectroscopy (OES) are widely used to determine the exact composition of the alloy.
These tests verify that the brass meets specific requirements for the part’s application.
Chemical Analysis: Manufacturers often conduct chemical testing on incoming raw materials to ensure consistency. This involves checking for impurities and confirming the metal’s properties before production.

Certificates

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