Material Grades
Steadfast supplies fasteners and components across a wide range of material grades, from carbon and stainless steels to duplex, super duplex, nickel alloys, titanium and specialist exotic materials.
We support stocked and manufactured supply for applications where strength, corrosion resistance, temperature performance and certification are critical, including ASTM A193, A194 and A320 process bolting, ISO 898 property-class fasteners and ASTM F3125 structural bolting.
Material grades & specifications
Bolting standards & grades
Recognised bolting standards and specification codes.
- ASTM A193: B7, B7M, B16
- ASTM A320: L7, L7M, L43
- ASTM A194: 2H, 2HM, 7, 7M, 8, 8M
- ISO 898
- ASTM F3125 structural fasteners
- ASTM A540 specialist alloy-steel bolting
Stainless steels
Austenitic stainless classes and related grades.
- B8
- B8M
- B8T
- Related stainless grades
Duplex & super duplex
Corrosion-resistant grades for aggressive environments.
- UNS S31803
- UNS S32750
- UNS S32760 / F55
- UNS S32760 Condition S
- Ferralium 255 / UNS S32550
Nickel alloys, titanium & exotic materials
High-performance alloys for the most demanding duty.
- Alloy 625
- Alloy 718
- API 6A CRA UNS N07718
- Alloy 80A
- Alloy 20CB3
- Alloy C276
- Alloy C22
- Monel 400
- Monel K500
- Titanium
Specialist high-temperature, copper & marine alloys
High-temperature bolting and copper-based alloys for demanding service.
- ASTM A453 Grade 660 Classes A/B/C/D
- Durehete 950
- Durehete 1055
- NES 835 copper-nickel
- NES 833 nickel aluminium bronze
- DGS 1043 nickel aluminium bronze
- PB102 phosphor bronze
Typical requirements
- Strength
- Corrosion resistance
- Temperature performance
- Traceability
- Certification
- Project compliance
Standard grades
Supply against recognised bolting standards, including commonly specified ASTM grades for petrochemical, refinery, energy and industrial applications.
Exotic alloys
Specialist nickel alloys, titanium and exotic materials for high-performance applications where standard grades fall short.
Traceable supply
Support with material selection, grade matching, certification requirements and project-specific documentation.
Need help matching a material grade to a project specification?
Speak to the Steadfast team.