At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to IS 4072. IS 4072 ‘Steel for spring washers – Specification’ (IS 4072:1975). Indian Standard covering the silico-manganese / carbon spring-steel used to manufacture single-coil and other spring (lock) washers, defining chemistry, section and hardness after heat treatment. It is NOT a high-pressure bolting steel.
IS 4072 ‘Steel for spring washers – Specification’ (IS 4072:1975). Indian Standard covering the silico-manganese / carbon spring-steel used to manufacture single-coil and other spring (lock) washers, defining chemistry, section and hardness after heat treatment. It is NOT a high-pressure bolting steel.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Grade 1 (Si-Mn spring steel) | ~55Si7 / 60Si7-type | Silico-manganese spring steel |
| Grade 2 (carbon spring steel) | ~C55-C67-type | Higher-carbon spring steel |
Minimum mechanical requirements per IS 4072.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Spring washer (hardened & tempered) | – | – | – | 42-52 HRC (hardened & tempered) |
| Grade | Key Composition, % |
|---|---|
| Si-Mn spring steel | C 0.50-0.65, Si 1.5-2.0, Mn 0.70-1.00, S/P <=0.045 |
| Carbon spring steel | C 0.55-0.70, Mn 0.60-0.90, Si <=0.35 |
Spring-washer steel comparable to DIN 17222 / EN 10132 55Si7 / 60SiCr7, SAE 9260, and washer standards IS 3063 / DIN 127 / DIN 128 (component standards).
For the official Bureau of Indian Standards (BIS) standards catalogue, see the Bureau of Indian Standards (BIS) standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply IS 4072 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
IS 4072 ‘Steel for spring washers – Specification’ (IS 4072:1975). Indian Standard covering the silico-manganese / carbon spring-steel used to manufacture single-coil and other spring (lock) washers, defining chemistry, section and hardness after heat treatment. It is NOT a high-pressure bolting steel.
Ananka Fasteners supplies Grade 1 (Si-Mn spring steel), Grade 2 (carbon spring steel) to IS 4072. See the Grades / Classes Covered table above for full details of each grade.
Minimum tensile strength, yield strength, elongation and hardness requirements vary by grade — see the Mechanical Properties table above for the complete breakdown.
We supply IS 4072 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
Yes. For a quotation, provide the required fastener type, grade, nominal size, dimensional standard, quantity and any inspection or certificate requirements.
Need a fastener released to IS 4072 for an industrial project? Send the required fastener type, grade, size, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: IS 4072 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per IS 4072 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
