
Material Overview
13-8 PH (UNS S13800 / AMS 5629 / XM-13) is a premium martensitic precipitation-hardening stainless steel. Produced via vacuum induction melting (VIM) followed by vacuum arc remelting (VAR) or electroslag remelting (ESR), it offers high strength, superior fracture toughness, and resistance to stress-corrosion cracking.
13-8PH Chemical Composition Specification
| Element | Minimum (%) | Maximum (%) |
| Carbon (C) | 0.05 | |
| Chromium (Cr) | 12.25 | 13.25 |
| Nickel (Ni) | 7.50 | 8.50 |
| Molybdenum (Mo) | 2.00 | 2.50 |
| Aluminum (Al) | 0.90 | 1.35 |
| Manganese (Mn) | 0.10 | |
| Silicon (Si) | 0.10 | |
| Phosphorus (P) | 0.010 | |
| Sulfur (S) | 0.008 | |
| Nitrogen (N) | 0.010 | |
| Iron (Fe) | Balance | Balance |
Mechanical & Physical Properties
| Property | Metric | Imperial |
| Density | 7.78 g/cm | 0.281 lb/in |
| Melting Range | 1404C to 1440C | 2560F to 2630F |
| Hardness (Solution Treated - Condition A) | Max 363 HBW | Max 38 HRC |
| Tensile Strength (Condition H950) | 1515 MPa | 220 ksi |
| Yield Strength 0.2% (Condition H950) | 1413 MPa | 205 ksi |
| Magnetic Nature | Ferromagnetic (Martensitic structure) | Ferromagnetic |
Scrap & Plate Cutting Offcut Classifications
Types of Scrap: Plate offcuts, sheet offcuts, bar end cuts, ring offcuts, turnings/borings, solid foundry scrap.
Scrap Grades: Clean solid 13-8PH (segregated, free of oil, dirt, and contamination from other stainless grades like 304, 316, or 17-4PH).
Common Plate Cutting Methods:
Waterjet Cutting: Recommended method to avoid heat-affected zones (HAZ) and preserve material mechanical structure.
Laser Cutting: Suitable for thin-to-medium plate sections with tight tolerances.
Plasma Cutting: Used for heavy section plate cutting.
Shearing: Applicable to light-gauge sheet/plate stock.
Key Industry Standards & Specifications
AMS Standard: AMS 5629 (Bars, Forgings, Rings), AMS 5864 (Plate)
ASTM Standard: ASTM A564 (Type XM-13), ASTM A693 (Sheet, Strip, Plate), ASTM A705
UNS Designation: UNS S13800
HS Code: 7222.11 / 7222.20 / 7204.49 (Scrap)
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