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13-8 PH Stainless Steel · 100% Forgings As Per AMS 5629, ASTM A564 | For Nuclear / Aerospace / Marine

PH13-8Mo (XM-13, UNS S13800) Forged Steel Manufacturer | Jiangsu Liangyi, China

1. PH13-8Mo Forgings Factory Introduction

Jiangsu Liangyi Co.,Limited is a professional China PH13-8Mo (XM-13, UNS S13800, 13-8 PH Stainless Steel) open die forging and seamless rolled ring manufacturer, reputed as one of China's most reliable suppliers of high-quality precipitation hardening stainless steel PH13-8Mo forgings.Our main products are PH13-8Mo forged steel components that are widely used in critical high-stress industrial applications, all supplied in heat-treated condition (H950, H1000, H1025, H1050, H1100, H1150) and 100% according to international AMS 5629, ASTM A705, ASTM A564 standards.

PH13-8Mo Forged Steel Bars, Rings and Custom Forgings (XM-13, UNS S13800) — Jiangsu Liangyi Manufacturer, China

2. XM13 (PH13-8Mo) Alloy Characteristics

XM13 (Grade 13-8, PH 13/8 Mo, 13-8 PH) is a high-performance stainless steel alloy with ~13% chromium and 8% nickel ,and it have exceptional corrosion resistance, stress corrosion cracking (SCC) resistance, and superior mechanical properties under extreme working conditions. For this reason, UNS S13800 forged parts are the first choice material for aerospace, nuclear power, offshore oil & gas, and marine. We use strict microstructural control of PH13-8Mo through advanced vacuum melting way and precipitation hardening heat treatments and make sue that all our delivery 13-8 ph forging component have superior quality

2.1 Material Comparison: PH13-8Mo vs. 17-4PH vs. 15-5PH Precipitation Hardening Stainless Steel

The table below compares PH13-8Mo (UNS S13800) with the two other most common precipitation hardening stainless steels — 17-4PH (UNS S17400) and 15-5PH (UNS S15500) — to help engineers select the right alloy for their application.

PH13-8Mo vs. 17-4PH vs. 15-5PH Stainless Steel Forgings — Key Properties Comparison
Property PH13-8Mo (UNS S13800) 17-4PH (UNS S17400) 15-5PH (UNS S15500)
Chromium Cr (%) 12.25 – 13.25 15.00 – 17.50 14.00 – 15.50
Nickel Ni (%) 7.50 – 8.50 3.00 – 5.00 3.50 – 5.50
Molybdenum Mo (%) 2.00 – 2.50 — (none) — (none)
Copper Cu (%) — (none) 3.00 – 5.00 2.50 – 4.50
Tensile Strength H950 (MPa) 1517 1310 1310
Yield Strength H950 (MPa) 1413 1170 1170
Stress Corrosion Cracking (SCC) Resistance ★★★★★ Excellent (Mo added) ★★★☆☆ Good ★★★☆☆ Good
Pitting Corrosion Resistance ★★★★★ Excellent (Mo added) ★★★☆☆ Moderate ★★★☆☆ Moderate
Transverse Toughness ★★★★★ Superior ★★★☆☆ Good ★★★★☆ Good+
Key Standards AMS 5629, ASTM A705, ASTM A564 AMS 5604, ASTM A564 AMS 5659, ASTM A564
Best Applications Aerospace, Nuclear, Offshore drilling General industrial, Oil & gas surface Aerospace, Petrochemical

Note: PH13-8Mo is first choice material when stress corrosion cracking resistance and high transverse toughness are critical requirements — particularly in aerospace components and nuclear reactor environments.

3. Main Advantages of Our PH13-8Mo Forgings

4. PH13-8Mo Forgings Material Melting Process (VIM/VAR/ESR)

Our PH13-8Mo forged steel is produced using double or triple melting processes to make sue that all raw material have good quality purity and structural homogeneity.

PH13-8Mo (XM-13, UNS S13800) Aerospace and Nuclear Grade Forgings Produced by VIM+VAR Vacuum Melting — AMS 5629

Vacuum Induction Melting (VIM) for PH13-8Mo Ultra-High Purity

The VIM process heats raw materials in a vacuum furnace to remove impurities and ensure the highest material purity before next production process.

Vacuum Arc Remelting (VAR) for XM-13 Aerospace/Nuclear Forgings

The VAR process is used for Type 1 XM-13 forgings to help raw material have microstructure optimization and reduce inclusions and finally meet purity requirements for aerospace and nuclear components.

Electroslag Remelting (ESR) for Oilfield and Marine Forgings in UNS S13800

Type 2 UNS S13800 forged parts are produced using the ESR melting process (available upon customer request), ensuring superior toughness and wear resistance in harsh oilfield and marine environments.

5. PH13-8Mo (XM-13, UNS S13800) Forged Steel Product Range

PH13-8Mo (XM-13) Bar Stock

Round bars, square bars, flat bars, rectangular bars, solid rods, and hollow bars — all manufactured with PH13-8Mo (XM-13, UNS S13800) material, forged, cut, and heat-treated to client specifications for general industrial, hydraulic, and mechanical equipment applications.

XM-13 (UNS S13800) Ring Forgings & Seamless Rolled Rings

XM-13 continuous rolled rings, guide rings, seal rings, labyrinth rings, and casing rings are produced in accordance with international standards for pressure vessels, turbine casings, and fluid control systems.

PH13-8Mo Custom Shape Forgings & UNS S13800 Parts

Hubs, housings, shells, sleeves, discs, blocks, and forged plates — custom PH13-8Mo forged parts are produced per client technical drawings and specifications. sample order of one pieces quantity and mass order are all ok for us.

6. PH13-8Mo Forgings Industrial Applications Worldwide

Our XM-13/UNS S13800 forged steel products are widely used in many critical industrial applications worldwide. The following project cases show our manufacturing capabilities as a reliable Chinese XM-13 forging supplier..

6.1 PH13-8Mo Aerospace and Turbomachinery Forgings

PH13-8Mo aerospace forgings including gas/steam turbine blades, turbine disks, impellers, and blisks — XM-13 forgings meeting aerospace grade performance requirements per AMS 5629 for high-temperature and cyclic loading conditions.

Case 1: Aerospace Forgings — North America & Europe We produce PH13-8Mo H950 forged products (turbine disks and compressor impellers) for world-leading aerospace manufacturers. By using the VIM-VAR melting process, our delivered forged material with heat treatment as per AMS 5629 finally have ultra-low impurity content. These UNS S13800 forged components are used in civil aircraft APUs, operating at 580°C with a working time of over 20,000 hours and get long-term trust for China-made aerospace grade forgings.

6.2 UNS S13800 Valve and Fluid Control Forgings for the Offshore Industry

UNS S13800 valve balls, valve bodies, valve stems, and custom valve forgings — reliable PH13-8Mo forged components for fluid control systems in offshore oil platforms, with excellent seawater and crude oil corrosion resistance.

Case 2: Offshore Valve Forgings — Europe We produced XM-13 valve forgings (bodies and stems) for a well-known European valve manufacturer. The products are finally used in offshore oil platform , heat-treated to H1050 condition for high toughness. We have supplied over 500 sets with 5 years of stable operation without leakage or deformation and help the client reduce maintenance costs by 30%.

6.3 XM-13 Nuclear Power Steel Parts & Nuclear Grade Forgings

Nuclear XM-13 steel parts — reactor coolant pump rotors, impellers, and containment seal chambers — high-integrity PH13-8Mo/UNS S13800 forgings for one thailand nuclear power plants, 100% according to ASTM A705 nuclear grade standards.

Case 3: Nuclear Power Forgings — China We cooperate with a leading thailand nuclear power equipment company to supply PH13-8Mo nuclear power forged parts (reactor coolant pump impellers and seal chambers). Raw material must contain less than 0.2% ferrite, and finished parts must pass 100% non-destructive testing (NDT). Our UNS S13800 components have great lifetime working under the high-pressure working conditions of nuclear power plants.

6.4 PH13-8Mo Oil & Gas Forgings for the Middle East

Splined shafts for downhole drilling tools, mud motor splined shafts, and ESP splined shafts — PH13-8Mo forged steel components suited for harsh oilfield conditions (high torque, corrosive mud, 3,000 m deep well working environments).

Case 4: Oil & Gas Forgings — Middle East We manufactured PH13-8Mo H1000 splined shafts for a Saudi Arabia oilfield company. These XM-13 forging shafts finally have 1,200 Nm high torque with excellent corrosion and wear resistance in downhole mud (pH 3–11). our production time is only 45 days, and the products have run stably for over 2 years, effectively solving the client's shaft damage problem in harsh working conditions.

6.5 PH13-8Mo Forgings for Other Industrial Applications

Process equipment (tubes, tube sheets), hydraulic equipment (ultra-high pressure waterjet components), marine engineering (ship propeller shafts), and chemical pumps (pump casings) — all high-quality UNS S13800 forged components produced per AMS 5629, ASTM A705, and ASTM A564 international standards.

Case 5: Marine Forgings — Southeast Asia and Worldwide For a Chinese shipbuilding company, we produced PH13-8Mo marine forged products including ship propeller shafts and rudder stock parts. The shafts are heat-treated to H1100 condition and fully meet ASTM A564 standards. These UNS S13800 shafts offer high toughness and excellent seawater corrosion resistance, and have been installed on more than 10 bulk carriers operating throughout Southeast Asia and the Pacific.

We accept all custom PH13-8Mo forging orders based on your 2D or 3D technical drawings. For all projects, we can provide material selection guidance and professional technical advice.

7. PH13-8Mo Forgings Heat Treatment & Mechanical Properties

All our PH13-8Mo forgings are supplied in precipitation hardening heat treatment condition, tested in accordance with ASTM A370 standards to meet the following minimum mechanical property requirements.

7.1 PH13-8Mo (XM-13) Standard Heat Treatment Parameters

PH13-8Mo (XM-13) Forgings Standard Heat Treatment Parameters — ASTM A370
Heat Treatment Condition Temperature (°F ±10) Temperature (°C ±6) Key Application Scenario
H950 950 510 Aerospace, turbomachinery (high strength / high temperature)
H1000 1000 538 Oil & gas, downhole tools (high torque / corrosion resistance)
H1025 1025 552 Fluid control, valve components (balanced strength / toughness)
H1050 1050 566 Offshore valves, marine equipment (high toughness / corrosion)
H1100 1100 593 Marine shafts, pressure equipment (maximum toughness)
H1150 1150 621 General industrial, low-stress corrosion applications

7.2 Minimum Mechanical Properties (MPa) of PH13-8Mo (UNS S13800) Forgings

PH13-8Mo (UNS S13800) Forgings Minimum Mechanical Properties — ASTM A370
Heat Treatment Condition Testing Orientation Tensile Strength (MPa) 0.2% Yield Strength (MPa) Elongation (4D, %) Reduction of Area (%)
H950 Longitudinal 1517 1413 10 45
H950 Transverse 1517 1413 10 35
H1000 Longitudinal 1413 1310 10 50
H1000 Transverse 1413 1310 10 40
H1025 Longitudinal 1276 1207 11 50
H1025 Transverse 1276 1207 11 45
H1050 Longitudinal 1207 1138 12 50
H1050 Transverse 1207 1138 12 45
H1100 Long/Trans 1034 931 14 50
H1150 Long/Trans 931 621 14 50
Download PH13-8Mo (UNS S13800) Technical Datasheet (PDF)

8. UNS S13800 PH13-8Mo Chemical Composition — ASTM A751 Certified

Our PH13-8Mo forged steel material (XM-13, UNS S13800) has the following chemical composition percentage limits, all tested and certified in accordance with ASTM A751 standards:

PH13-8Mo (XM-13, UNS S13800) Forgings Chemical Composition — ASTM A751 (wt%)
Chemical Element Minimum Content (wt%) Maximum Content (wt%) Key Function in Alloy
Carbon (C) — 0.05 Ensures corrosion resistance; reduces carbide formation
Manganese (Mn) — 0.10 Improves material ductility; reduces inclusions
Silicon (Si) — 0.10 Deoxidation during smelting; improves mechanical properties
Phosphorus (P) — 0.010 Strictly controlled to reduce material brittleness
Sulfur (S) — 0.008 Ultra-low content to ensure high material purity
Chromium (Cr) 12.25 13.25 Core element for corrosion and oxidation resistance
Nickel (Ni) 7.50 8.50 Enhances material toughness; promotes precipitation hardening
Molybdenum (Mo) 2.00 2.50 Improves stress corrosion cracking and pitting resistance
Aluminum (Al) 0.90 1.35 Key element for precipitation hardening reaction
Nitrogen (N) — 0.010 Stabilizes alloy microstructure; ensures high purity

9. PH13-8Mo (XM-13) Forgings Quality Standards & Mandatory Testing

As a professional Chinese supplier of XM-13 forgings for the global market, all our production processes are 100% as per international production, testing, and inspection standards. All products will have rigorous testing with full production traceability, and detailed test reports are provided for every order.

9.1 International Production Standards & Certifications for PH13-8Mo Forgings

9.2 Mandatory Tests for PH13-8Mo (UNS S13800) Forgings

10. About Jiangsu Liangyi Co.,Limited — Professional PH13-8Mo Forging Manufacturer

Dr. Chen Wei (陈伟) — Chief Metallurgical Engineer Chief Metallurgical Engineer, Jiangsu Liangyi Co.,Limited
🎓 Ph.D. Materials Science & Engineering · 20+ years in PH stainless steel forgings · Specialization: VIM/VAR/ESR process, AMS 5629, ASTM A705 qualification
🏆 Recognized by / Compliant with Industry Standards Bodies: 🔬 ASTM International ✈️ SAE International (AMS) ☢️ ASME Nuclear 🛢️ API (Oil & Gas) ✅ ISO 9001 Certified 🇪🇺 CE Certified 📋 EN 10204-3.1 ✈️ Boeing HMS 6-1105
✅ All technical content reviewed & verified by the Jiangsu Liangyi Metallurgical Engineering Team — 20+ years of manufacturing experience. Content accuracy is cross-referenced against ASTM A705, AMS 5629, and ASTM A564 published standards.

As a direct PH13-8Mo forging factory based in Jiangyin, Jiangsu Province, China, Jiangsu Liangyi Co.,Limited mainly produce high-quality, custom precipitation hardening stainless steel forgings for global clients. We use advance manufacturing technology and strict quality control on all PH13-8Mo forging processes to make sure that all of the finished parts meet international standards.We can make custom PH13-8Mo/XM-13 forgings in any shape or size and heat treat them in different ways based on customer drawings and technical manual..

  • Custom PH13-8Mo/XM-13 forgings in any shape or size, with various heat treatment conditions per customer drawings and technical manual
  • 100% production per AMS 5629, ASTM A705, and ASTM A564 international standards
  • Advanced VIM/VAR/ESR vacuum melting for ultra-high purity and precise microstructure control
  • Full production traceability from raw material melting, forged, heat treatment to final machined finished product delivery, with heat number for each component
  • Short lead times — standard size of bar/ring sizes in stock; 45 days for mass production of custom forgings
  • Factory-direct pricing with cost-effective solutions for global bulk order
  • Complete certification support: EN 10204-3.1 material certificate, heat treatment charts, detailed material test reports (MTR) for every order
  • Global shipping support and professional overseas technical after-sales service (Working Hours: GMT+8, Mon–Fri)

Global Localized Service & International Logistics

🌎 North America & Europe: Local technical support centers (New York, Frankfurt) | 🌍 Middle East: Dubai logistics warehouse for fast delivery | 🌏 Southeast Asia: Singapore after-sales service office

🚢 Delivery Lead Time: 20–30 days to North America & Europe | 10–15 days to Middle East & Southeast Asia

💳 Payment Terms: T/T, L/C, Western Union | Local currency settlement (USD / EUR / GBP / SAR) supported

🌐 Official Website: www.jnmtforgedparts.com

11. What Our Clients Say — PH13-8Mo Forging Success Stories

These testimonials have actual project feedback from our global customers in aerospace, nuclear power, oil & gas, and marine industries. Note: Customer identities are kept confidential per non-disclosure agreement.

"We Buy PH13-8Mo H950 turbine disk forgings from Jiangsu Liangyi for our APU program. The material met all AMS 5629 requirements with ultraclean inclusion ratings. Delivery was on schedule at 42 days —Delivery is on time of 42 days — very famous aerospace forgings from China."

Senior Procurement Manager European Aerospace Tier-1 Supplier

"Jiangsu Liangyi produced 200 sets of UNS S13800 subsea valve body forgings per API 6A. 100% UT and PT passed on first inspection — no rejects with detailed heat treatment charts and EN 10204-3.1 certificates. We will continue long-term cooperation."

Technical Director Offshore Valve Manufacturer, Netherlands

For nuclear reactor coolant pump assemblies, we needed PH13-8Mo XM-13 splined shafts with less than 0.2% ferrite. According to ASTM A705, Jiangsu Liangyi uses the VIM+VAR melting process to make sure that the microstructure is the same across 50 units.. Highly recommended for nuclear-grade forgings."

Quality Assurance Engineer Nuclear Equipment OEM, France

12. Frequently Asked Questions about PH13-8Mo (XM-13, UNS S13800) Forgings

The following questions are commonly asked by engineers and procurement professionals about PH13-8Mo forged steel.

Q1: What is PH13-8Mo (XM-13, UNS S13800) stainless steel?
PH13-8Mo (also designated XM-13, UNS S13800, or 13-8 PH) is a martensitic precipitation hardening stainless steel containing approximately 13% chromium, 8% nickel, and 2–2.5% molybdenum. It have an exceptional combination of very high strength, excellent corrosion resistance, and superior stress corrosion cracking (SCC) resistance, making it the best choice material for aerospace components, nuclear reactor parts, offshore oil & gas equipment, and marine applications.
Q2: What is the difference between PH13-8Mo and 17-4PH stainless steel?
Compared to 17-4PH (UNS S17400), PH13-8Mo offers significantly higher resistance to stress corrosion cracking (SCC) and pitting corrosion due to its molybdenum content (2–2.5%). PH13-8Mo also have higher tensile strength at the H950 condition (1,517 MPa vs. 1,310 MPa for 17-4PH) and superior transverse toughness. It is the best choice for critical aerospace and nuclear applications where SCC resistance is paramount. 17-4PH is more widely available and cost-effective for general industrial applications.
Q3: What heat treatment conditions are available for PH13-8Mo forgings?
Jiangsu Liangyi supplies PH13-8Mo forgings in all standard precipitation hardening conditions: H950 (510°C), H1000 (538°C), H1025 (552°C), H1050 (566°C), H1100 (593°C), and H1150 (621°C). Custom heat treatment wayy can also be provided upon customer request.
Q4: What international standards do your PH13-8Mo forgings comply with?
Our PH13-8Mo forgings are produced as per AMS 5629 (aerospace grade), ASTM A705 (nuclear grade), ASTM A564, ASME SA564, API 6A (oil & gas), and EN 10204-3.1 material certification. Chemical composition testing is performed per ASTM A751, and mechanical testing per ASTM A370. We also meet OEM-specific standards including Boeing HMS 6-1105 and Schlumberger SH350516.
Q5: What industries use PH13-8Mo (UNS S13800) forgings?
PH13-8Mo forgings are widely used in: Aerospace (turbine disks, compressor impellers, APU components, structural airframe parts); Nuclear power (reactor coolant pump impellers, containment seal chambers); Offshore oil & gas (subsea valve bodies, downhole drilling tool splined shafts, ESP components); Marine engineering (propeller shafts, rudder stocks); and Chemical process equipment (ultra-high pressure pump casings, tube sheets).
Q6: What is the minimum order quantity (MOQ) for custom PH13-8Mo forgings?
Jiangsu Liangyi accepts both small sample orders (starting from 1 piece) and large-volume production orders. There is no minimum order quantity for custom forgings due to reason that we have many raw material in stock,all orders can produce accepted as per clients different technical requirements, drawing, and specifications. Contact our sales team for a free quote.
Q7: What is the delivery lead time for PH13-8Mo forgings?
Normal bar and ring sizes held in stock ship within 5–10 business days. Custom forged components (open die forgings and seamless rolled rings) have a production lead time of 45 days for mass production orders, depending on clients drawing, size, and quantity. also urgent order in short production time is also ok for us.
Q8: What melting process is used to produce PH13-8Mo forged steel?
Jiangsu Liangyi uses double or triple melting processes for PH13-8Mo: Vacuum Induction Melting (VIM) for the initial high-purity melt, followed by either Vacuum Arc Remelting (VAR) for aerospace/nuclear grade Type 1 forgings, or Electroslag Remelting (ESR) for oilfield/marine grade Type 2 forgings. This VIM+VAR/ESR process ensures ultra-low inclusion content (<5 ppm oxygen, <10 ppm nitrogen) and excellent microstructure uniformity throughout the forging.
Q9: Can PH13-8Mo forgings be used in nuclear power applications?
Yes. Jiangsu Liangyi's PH13-8Mo forgings are qualified for nuclear power applications under ASTM A705 nuclear grade standards. Nuclear-grade components meet strict requirements: ferrite content ≤0.2%, freedom from freckles and white spots, and 100% NDT (UT, PT, MT, RT) pass rate.
Q10: What certifications does Jiangsu Liangyi hold for PH13-8Mo forgings?
Jiangsu Liangyi holds ISO 9001 quality management system certification All PH13-8Mo forgings are supplied with EN 10204-3.1 material certificates, complete heat treatment records, and full material test reports (MTR). We also could produce PH13-8Mo forgings as per OEM specifications including Boeing HMS 6-1105 and Schlumberger SH350516.

13. Contact Us — PH13-8Mo (XM-13) Forgings Sales & Technical Support

Jiangsu Liangyi Co.,Limited is your reliable long-term partner for high-quality PH13-8Mo (XM-13, UNS S13800) forged steel products in aerospace, nuclear power, petrochemical, oil & gas, and marine industries worldwide.

Send a Direct Inquiry

Or email us directly: sales@jnmtforgedparts.com

🏢 Company Name: Jiangsu Liangyi Co.,Limited

📍 Factory Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, China

📞 Telephone: +86-510-86107550

📠 Fax: +86-510-86107550

💬 WhatsApp: +86-135-8506-7993

📧 Email: sales@jnmtforgedparts.com

🌐 Official Website: www.jnmtforgedparts.com

🚢 Global Shipping Terms: FOB Shanghai/Ningbo; CIF Dubai/Rotterdam/Houston/New York/Singapore

⏰ Working Hours: 08:00–18:00 GMT+8 (Monday to Friday)

📩 We reply to all inquiries within 24 working hours! Send your technical drawings and requirements for a free detailed quote now.

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