At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to BS 970-1. BS 970-1 ‘Specification for wrought steels for mechanical and allied engineering purposes – Part 1: General inspection and testing procedures and specific requirements for carbon, carbon-manganese, alloy and stainless steels’. Defines the six-digit steel designation system (e.g. 080M40) and property requirements for bright/hot-rolled bar used to machine bolts, studs and nuts.
BS 970-1 ‘Specification for wrought steels for mechanical and allied engineering purposes – Part 1: General inspection and testing procedures and specific requirements for carbon, carbon-manganese, alloy and stainless steels’. Defines the six-digit steel designation system (e.g. 080M40) and property requirements for bright/hot-rolled bar used to machine bolts, studs and nuts.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| 070M20 | En3B | Low-carbon mild steel |
| 080M40 | En8 | Medium-carbon C-Mn steel |
| 080A47 / 080M46 | En43 | Medium-high carbon steel |
| 605M36 | En16 | Mn-Mo through-hardening steel |
| 708M40 | En19 | Cr-Mo alloy steel |
| 817M40 | En24 | Ni-Cr-Mo high-strength steel |
| 655M13 | En36 | Ni-Cr case-hardening steel |
| 303S31 / 304S31 | AISI 303/304 | Austenitic stainless |
Minimum mechanical requirements per BS 970-1.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| 070M20 (normalised) | 62 (430) | 31 (215) | 21 | 126 HB |
| 080M40 (normalised) | 80 (550) | 41 (280) | 16 | 152-207 HB |
| 605M36 (Q&T, cond R) | 100 (700 min) | 76 (525) | 17 | 201-255 HB |
| 708M40 (Q&T, cond T) | 130-150 (900-1050) | 100 (700) | 13 | 248-302 HB |
| 817M40 (Q&T, cond W) | 155 (1075) | 136 (940) | 11 | 293-352 HB |
| 655M13 (case-hardened core) | 130 (900) | 100 (700) | 15 | 255 HB |
| Grade | Key Composition, % |
|---|---|
| 070M20 | C 0.16-0.24, Mn 0.50-0.90 |
| 080M40 | C 0.36-0.44, Mn 0.60-1.00 |
| 605M36 | C 0.32-0.40, Mn 1.3-1.7, Mo 0.22-0.32 |
| 708M40 | C 0.36-0.44, Cr 0.90-1.20, Mo 0.25-0.35 |
| 817M40 | C 0.36-0.44, Ni 1.3-1.7, Cr 1.0-1.4, Mo 0.20-0.35 |
Grades map to EN 10083 (080M40=C40/C45; 708M40=42CrMo4; 817M40=34CrNiMo6/36CrNiMo4), AISI/SAE 1020/1040/4140/4340, DIN C22/C45/42CrMo4/34CrNiMo6.
For the official BSI standards catalogue, see the BSI standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply BS 970-1 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.
BS 970-1 ‘Specification for wrought steels for mechanical and allied engineering purposes – Part 1: General inspection and testing procedures and specific requirements for carbon, carbon-manganese, alloy and stainless steels’. Defines the six-digit steel designation system (e.g. 080M40) and property requirements for bright/hot-rolled bar used to machine bolts, studs and nuts.
Ananka Fasteners supplies 070M20, 080M40, 080A47 / 080M46, 605M36, 708M40, 817M40, 655M13, 303S31 / 304S31 to BS 970-1. 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 BS 970-1 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 BS 970-1 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: BS 970-1 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per BS 970-1 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
