PH 13-8 Mo Fasteners
RAYCHIN SPECIALTY METALS FASTENERS: BOLTS, NUTS, SCREWS, WASHERS, STUDS, THREADED RODS, U-BOLT, J-BOLTS
STANDARD AND CUSTOMIZED, SMALL BATCH AND LARGE BATCH, IMPERIAL AND METRIC
Request a Quote from RAYCHIN
We're here to help!
RAYCHIN LIMITED
Specialist in PH 13-8 Mo Fasteners · Bolts · Nuts · Screws · Washers · Stud Bolts · Threaded RodsPH 13-8 Mo Fasteners: Precipitation-Hardening Stainless Steel for Extreme Strength & Toughness
RAYCHIN LIMITED is a leading manufacturer of PH 13-8 Mo fasteners — including PH 13-8 Mo bolts, PH 13-8 Mo nuts, PH 13-8 Mo screws, PH 13-8 Mo washers, PH 13-8 Mo stud bolts, and PH 13-8 Mo threaded rods. PH 13-8 Mo (UNS S13800) is a martensitic precipitation-hardening stainless steel alloyed with chromium, nickel, molybdenum, and aluminum. It combines ultra-high strength (up to 220 ksi / 1517 MPa) with excellent toughness and outstanding resistance to stress corrosion cracking. Our fasteners are manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, and KS standards, as well as custom configurations. PH 13-8 Mo is widely used in aerospace, defense, nuclear, oil & gas, and marine applications where high strength and corrosion resistance are critical. Fasteners are supplied in the solution-annealed condition (Condition A) and can be aged to various tempers (H950, H1000, H1025, H1050, H1100, H1150) to achieve specific mechanical property combinations. RAYCHIN delivers full traceability, PMI testing, and third-party certifications.
PH 13-8 Metallurgy & Fastener Advantages
Precipitation Hardening
PH 13-8 Mo fasteners derive their strength from aging heat treatment. After solution annealing (Condition A), fasteners are aged at 950°F to 1150°F (510°C to 620°C) to precipitate fine intermetallic compounds (NiAl) within the martensitic matrix. This yields ultimate tensile strengths from 170 ksi to 220 ksi with excellent ductility and fracture toughness.
Key Fastener Benefits
- Ultra-high strength: up to 220 ksi (1517 MPa) UTS.
- Outstanding toughness: superior to many high-strength alloys.
- Stress corrosion cracking resistant: excellent performance in marine, H₂S, and chloride environments.
- High fatigue strength: ideal for cyclic loading.
- Good ductility: elongation 10-18% depending on temper.
- Non-magnetic (temper dependent).
Applications
- Aerospace: airframe bolts, landing gear nuts, engine mounts
- Defense: naval fasteners, missile components
- Oil & Gas: wellhead stud bolts, valve stem screws
- Nuclear: reactor internals, high-strength bolting
- Marine: propeller shaft nuts, seawater pumps
- Chemical: high-pressure autoclave fasteners
Complete Range of PH 13-8 Mo Fasteners
PH 13-8 Mo Bolts
PH 13-8 Mo bolts manufactured to ASME B18.2.1, ASME B18.3 (socket head), DIN 931, DIN 912, ISO 4014, ISO 4762, NAS1351, NAS1352, AN bolts (AN3-AN20), MS20073, MS20074, and more. Available in hex head, socket head, carriage, and specialty head styles. Thread classes 2A, 3A, UNJF-3A, 6g. Supplied in Condition A, then aged to H950, H1000, or H1025 per customer PO.
PH 13-8 Mo Nuts
PH 13-8 Mo nuts including hex nuts (ASME B18.2.2), heavy hex nuts, jam nuts, slotted nuts, self-locking nuts, and custom configurations. Compliant with AN315, AN316, MS21045, MS21046, NAS1291, and DIN 934, DIN 985. Available in all tempers. 100% thread inspection. Optional cadmium plating, silver plating, or passive finish.
PH 13-8 Mo Screws
PH 13-8 Mo screws in pan head, flat head, socket cap, and set screw styles. Conforming to MS16995, MS16998, MS24693, NAS560, NAS561, DIN 7984, ISO 7380. Precision rolled threads. Custom drive options (hex, Torx, Phillips) available.
PH 13-8 Mo Washers
PH 13-8 Mo washers in flat, fender, split lock, tooth lock, and custom shapes. Made to NAS620, AN960, MS20002, DIN 125, ISO 7089. Sizes from #0 to 3" and metric M2 to M64. Precision stamped or machined.
PH 13-8 Mo Stud Bolts
PH 13-8 Mo stud bolts with full thread or centerless ground. Conforming to ASTM A564, API 20F, API 6A, NACE MR0175. Double-end, continuous thread, or custom lengths. Upset ends available. Supplied with matching nuts and washers.
PH 13-8 Mo Threaded Rods
PH 13-8 Mo threaded rods in 3-foot, 6-foot, 12-foot lengths or cut-to-size. Precision rolled or cut threads. Suitable for high-strength tie rods, tension applications, and structural connections.
International Standards & Global Designations for PH 13-8 Mo Fasteners
UNS S13800 1.4534 ASTM A564 AMS 5629 AMS 5864 XM-12 13-8 PH 05Cr13Ni8Mo2Al
Chemical Composition (Weight %) – PH 13-8 Mo (UNS S13800 / 1.4534)
Our PH 13-8 Mo fasteners are produced from certified heats conforming to ASTM A564 / AMS 5629. The precise balance of elements ensures consistent age-hardening response and mechanical properties.
Expert note: The low carbon, high purity (≤0.008% S, ≤0.010% P) and aluminum addition promote precipitation of fine NiAl intermetallics during aging, yielding ultra-high strength without sacrificing toughness or corrosion resistance.
Complete Mechanical Properties of PH 13-8 Mo Fasteners (per ASTM A564 / AMS 5629)
PH 13-8 Mo fasteners are supplied in solution annealed Condition A (1000-1050°C, air cooled or faster) and may be aged by the customer or RAYCHIN to various tempers. Minimum mechanical properties for common tempers are shown below.
Minimum Mechanical Properties – Various Tempers
Physical Properties & Elevated Temperature Performance
PH 13-8 Mo retains good strength at moderately elevated temperatures, though it is not considered a high-temperature alloy like superalloys. Maximum service temperature is typically 315-370°C (600-700°F) for aged conditions; above this, overaging may occur. Data for hot hardness and tensile retention:
Corrosion Resistance of PH 13-8 Mo Fasteners
PH 13-8 Mo offers excellent corrosion resistance, similar to Type 304 stainless steel in many environments, and superior resistance to stress corrosion cracking compared to other high-strength alloys such as 17-4 PH or 15-5 PH.
NACE MR0175 / ISO 15156 compliance: PH 13-8 Mo is acceptable for sour service in the H1150 temper (maximum hardness 34 HRC) and double-aged conditions. Our NACE-compliant fasteners undergo strict hardness and heat treatment control.
Standards Compliance & Manufacturing
RAYCHIN LIMITED manufactures PH 13-8 Mo fasteners to all major standards:
In-house capabilities: precision CNC machining, thread rolling, heat treatment (vacuum furnaces), passivation, and 100% inspection. Full traceability per EN 10204 3.1. Third-party inspections (ABS, DNV, Lloyds) available upon request.
Special focus: PH 13-8 Mo Fasteners for Critical Applications
Our PH 13-8 Mo fasteners are trusted by leading aerospace, defense, and energy companies. We supply:
- Aerospace: NAS1351 socket head cap screws, NAS620 washers, AN hex bolts, MS21045 locknuts.
- Oil & Gas: API 6A stud bolts, NACE-compliant nuts, threaded rods for BOP stacks.
- Defense: MIL-S-25043 compliant bolts, custom fasteners for naval vessels.
- Nuclear: Grade 1, 2, 3 bolting materials, certified to ASME Section III.
- Custom: Special shoulder bolts, step studs, and non-standard threads.
All PH 13-8 Mo fasteners are supplied with material test reports, PMI verification, and dimensional inspection. Aging (H950, H1000, H1025, H1050, H1100, H1150) performed to precise time/temperature cycles.
Why RAYCHIN LIMITED – The PH 13-8 Mo Fastener Authority
Metallurgical Expertise
In-house metallurgists ensure proper solution annealing and aging response for every batch. We verify microstructure and mechanical properties to meet stringent aerospace and oil & gas requirements. All material is PMI tested for chemistry verification.
Global Approvals & Traceability
ISO 9001:2015, AS9100D certified. Our quality system meets NAS, AN, MS, ASTM, ASME, API, NACE, and customer-specific requirements. Full traceability from melt to finished fastener. Certifications include EN 10204 3.1/3.2.
Precision Heat Treating
Vacuum furnaces with ±5°F uniformity ensure consistent aging to H950, H1000, H1025, H1050, H1100, H1150. Computer-controlled cycles with digital chart recorders included in certification package.
Custom Capabilities
Need a special head style, non-standard length, or unusual thread? Our engineers collaborate to design and manufacture custom PH 13-8 Mo fasteners per your drawing. Quick-turn prototyping available.
Contact the PH 13-8 Mo fastener experts today
Request a quote for PH 13-8 Mo bolts, nuts, screws, washers, stud bolts, threaded rods – any global standard (NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS), any quantity. Inquire about high-strength fasteners for aerospace, defense, oil & gas, or custom applications.
sales@ray-chin.com | +86 534 2166 566Our team speaks English, German, Mandarin, and Japanese – ready for your global procurement.
Request A Quote! We'll respond as soon as possible(within 12 hours)
Get a Quote