At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASME SA193. ASME SA-193/SA-193M is the ASME Boiler & Pressure Vessel Code (Section II, Part A) adoption of ASTM A193/A193M. It covers alloy and stainless steel bolting material for pressure vessels, valves, flanges and fittings for high-temperature or high-pressure service. Content is essentially identical to ASTM A193; SA193 is the code-stamped version used for ASME BPVC construction.
ASME SA-193/SA-193M is the ASME Boiler & Pressure Vessel Code (Section II, Part A) adoption of ASTM A193/A193M. It covers alloy and stainless steel bolting material for pressure vessels, valves, flanges and fittings for high-temperature or high-pressure service. Content is essentially identical to ASTM A193; SA193 is the code-stamped version used for ASME BPVC construction.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| B5 | S50100 | 5% chromium alloy steel |
| B6 | S41000 | 13% chromium martensitic (410) |
| B7 | G41400 | Cr-Mo alloy steel (AISI 4140/4142), Q&T |
| B7M | G41400 | Cr-Mo alloy steel, tempered, hardness-controlled for sour service |
| B8 Cl.1 | S30400 | Austenitic 304, carbide solution treated |
| B8 Cl.2 | S30400 | Austenitic 304, strain hardened |
| B8M Cl.1 | S31600 | Austenitic 316, carbide solution treated |
| B16 | K14072 | Cr-Mo-V alloy steel, Q&T, high-temp |
Minimum mechanical requirements per ASME SA193.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| B7 (≤2-1/2 in) | 125 (860) | 105 (720) | 16 | 321 HBW max |
| B7 (2-5/8 to 4 in) | 115 (795) | 95 (655) | 16 | 321 HBW max |
| B7M (≤4 in) | 100 (690) | 80 (550) | 18 | 235 HBW max |
| B8 Cl.1 (all dia) | 75 (515) | 30 (205) | 30 | 223 HBW max |
| B8 Cl.2 (≤3/4 in) | 125 (860) | 100 (690) | 12 | 321 HBW max |
| B8M Cl.1 (all dia) | 75 (515) | 30 (205) | 30 | 223 HBW max |
| B8M Cl.2 (≤3/4 in) | 110 (760) | 95 (655) | 15 | 321 HBW max |
| B16 (≤2-1/2 in) | 125 (860) | 105 (725) | 18 | 321 HBW max |
| Grade | Key Composition, % |
|---|---|
| B7 | C 0.38-0.48, Cr 0.80-1.10, Mo 0.15-0.25, Mn 0.75-1.00 |
| B8 (304) | C 0.08 max, Cr 18-20, Ni 8-11 |
| B8M (316) | C 0.08 max, Cr 16-18, Ni 10-14, Mo 2-3 |
| B16 | C 0.36-0.44, Cr 0.80-1.15, Mo 0.50-0.65, V 0.25-0.35 |
Equivalent to ASTM A193/A193M (identical technical content). Companion nut spec: ASME SA194/ASTM A194. B7 corresponds to AISI 4140/4142; B8/B8M to AISI 304/316. Often paired with SA320 for low-temp service.
For the official ASME standards catalogue, see the ASME standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply ASME SA193 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.
ASME SA-193/SA-193M is the ASME Boiler & Pressure Vessel Code (Section II, Part A) adoption of ASTM A193/A193M. It covers alloy and stainless steel bolting material for pressure vessels, valves, flanges and fittings for high-temperature or high-pressure service. Content is essentially identical to ASTM A193; SA193 is the code-stamped version used for ASME BPVC construction.
Ananka Fasteners supplies B5, B6, B7, B7M, B8 Cl.1, B8 Cl.2, B8M Cl.1, B16 to ASME SA193. 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 ASME SA193 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 ASME SA193 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: ASME SA193 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASME SA193 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
