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Technical Engineering Blog

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In-depth material comparisons, heat treatment guides, and procurement frameworks — written by Jiangsu Liangyi's engineering team for specifiers worldwide.

20+ Years Manufacturing
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11 Technical Articles
Latest Articles
11 Articles · 2024–2026
Material Comparison · UNS N07725 vs UNS N06625
Alloy 725 Ni-Cr-Mo-Nb-Ti · Age Hardened
vs
Alloy 625 Ni-Cr-Mo-Nb · Solid Solution
≥ 827 MPa Alloy 725 Yield Strength
≥ 414 MPa Alloy 625 Yield Strength
NACE MR0175 Alloy 725 Sour Compliance
PRE ≥ 50 Alloy 625 Pitting Resistance
Materials Engineering Alloy 725 vs Alloy 625 Forgings: Key Differences & How to Choose

Expert comparison of UNS N07725 vs UNS N06625 forgings covering composition, yield strength (Alloy 725 is ~2× stronger), NACE MR0175 sour service compliance, heat treatment steps, and industry applications across oil & gas completions, subsea, and chemical processing — with a practical 9-point selection matrix for procurement engineers.

UNS N07725 UNS N06625 NACE MR0175 Sour Service Age Hardened Oil & Gas
Published May 2026 · ~10 min read Read Article →
03 Materials Engineering What Is PH 13-8 Mo Stainless Steel? Complete Technical Guide

Full technical overview of PH13-8Mo (UNS S13800): composition, mechanical properties by H-condition, corrosion resistance, forging process, and comparison with 17-4PH and 15-5PH for aerospace and industrial applications.

UNS S13800 AMS 5629 H950 / H1000 Aerospace
2025 Read →
04 Materials Engineering What Is Incoloy 945? Complete Guide to UNS N09945

Technical guide to Incoloy 945 (UNS N09945): composition, mechanical properties, NACE MR0175 sour service compliance, aging heat treatment, and forging applications in subsea trees and oil & gas completions equipment.

UNS N09945 NACE MR0175 Subsea Oil & Gas
2025 Read →
05 Corrosion Engineering Monel 400 vs 316L for Sour Gas Wellheads: Which Is Better?

Engineering comparison of Monel 400 (UNS N04400) and 316L stainless for sour gas wellhead components — H₂S resistance, chloride pitting, mechanical properties, cost analysis, and NACE MR0175 compliance guidance.

UNS N04400 H₂S Resistance Sour Service Wellhead
2025 Read →
Earlier Articles
Material Comparison · AMS 5773E vs AMS 5643
FV520B 13Cr–6Ni–2Mo–2Cu–Nb
vs
17-4PH 17Cr–4Ni–4Cu–Nb
≥ 55 J FV520B Charpy Impact
27–40 J 17-4PH Charpy Impact
≈ 304 SS FV520B Corrosion Level
~1310 MPa 17-4PH H900 Tensile
Materials Engineering FV520B vs 17-4PH Stainless Steel: A Full Performance Comparison for Industrial Forging

Which precipitation hardening stainless steel wins for your application? A rigorous side-by-side analysis covering 14+ mechanical and environmental properties across 7 industrial sectors — marine, oil & gas, power generation, aerospace, and more. Based on 20 years of FV520B production and verified client field data.

AMS 5773E AMS 5643 Pitting Resistance Charpy Toughness Marine / Offshore Power Generation
Published March 2026 · Updated May 2026 · ~12 min read Read Article →

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