ThePipingMart Blog Grades AMS-H-6875 Stainless Steel – Composition, Properties, and Uses

AMS-H-6875 Stainless Steel – Composition, Properties, and Uses


The aerospace industry is constantly evolving to accommodate advanced technology, and the materials used in the manufacturing process play a pivotal role. AMS-H-6875 is one such material that has garnered a lot of attention in recent times. In this blog, we dive deep into the specifics of AMS-H-6875, composition, properties, uses, hardness, heat treatment, and more.

What is AMS-H-6875?

AMS-H-6875 (also known as 15-5 PH Stainless Steel) is a specification that sets forth the minimum requirements for the heat treatment of steel parts. This specification is vital in ensuring reliability and safety in many different industries. Whether it’s aerospace, automotive, or manufacturing, AMS-H-6875 represents a critical tool for engineers and manufacturers to ensure they meet the necessary heat treatment standards. This specification carefully prescribes every detail, from the types of furnaces used to the specific temperatures and times required. With so much riding on the proper heat treatment of steel, AMS-H-6875 is truly an indispensable guide for professionals seeking to achieve the highest levels of performance and durability.

AMS-H-6875 Composition

MS-H-6875 sheet is a high-performance alloy combining nickel, chromium, and molybdenum. This alloy also includes trace amounts of carbon, silicon, manganese, and iron. The composition is designed to deliver excellent corrosion resistance and increased strength, making it an ideal choice for aerospace applications.

Carbon 0.07 max
Manganese 1.00 max
Phosphorus 0.040 max
Sulfur 0.030 max
Silicon 1.00 max
Chromium 14.00 – 15.50
Nickel 3.50 – 5.50
Copper 2.50 – 4.50
Columbium plus Tantalum 0.15 – 0.45

AMS-H-6875 Physical Properties

The material offers exceptional physical properties, such as high heat resistance, good wear resistance, and impressive dimensional stability. AMS-H-6875 also has a low thermal expansion, making it ideal for high-heat and high-stress environments. Additionally, it has good flexibility and toughness, making it easy to machine and process.

  • Melting Point: 2560 – 2625°F (1404 – 1440°C)
  • Density: 0.282 lbs/in3 / 7.78 g/cm3
  • Modulus of Elasticity in Tension: 28.5 X 106 psi / 196 GPa

AMS-H-6875 Mechanical Properties

AMS-H-6875 plates offers excellent tensile strength and endurance limit, making it ideal for use in harsh environments. The material can also withstand high load pressures and exhibit high yield strength under stress. Moreover, it has good fatigue resistance, making it a preferred choice in aerospace applications.

Properties Metric Imperial
Tensile Strength 1380 MPa 200000 psi
Yield Strength 1275 MPa 184900 psi
Modulus of Elasticity 200 GPa 29000 ksi
Elongation at Break 10% 10%
Hardness, Brinell 420 420
Hardness, Knoop 451 451
Hardness, Rockwell B 104 104
Hardness, Rockewell C 44.2 44.2
Hardness, Vickers 445 445
Charpy Impact 10 J 7.38

AMS-H-6875 Equivalents

  • PH15-5
  • XM-12
  • UNS S15500
  • 15Cr-5Ni
  • DIN X4CrNiCuNb164
  • X5CrNiCu15-5
  • DIN 1.4540
  • DIN 1.4545
  • SAE 15-5

AMS-H-6875 Specifications

  • AMS 5659 (Bar & Forgings)
  • AMS 5862 (Plate)
  • ASTM A564 (Grade XM-12)
  • ASTM A705 (Grade XM-12)
  • ASME SA564
  • Boeing BMS 7-240
  • Boeing BMS 7-351
  • SPP Canada Aircraft SPPCA-EN-SOW-0036 (Capability)
  • Liebherr LAT 1-9037
  • AMS-STD-2154 (Ultrasonic Inspection)

AMS-H-6875 Uses

AMS-H-6875 welding wire has numerous uses in the aerospace industry, including the manufacturing of propulsion systems, jet engines, rocket motors, and of course, aircraft structures. The material is particularly useful in areas with high heat, stress, and corrosive conditions.

AMS-H-6875  Hardness

AMS-H-6875 plate has a high tensile strength, making it one of the hardest materials available. The hardness of AMS-H-6875 ranges from 300-400 HB (Brinell hardness).

AMS-H-6875 Heat Treatment

To improve the mechanical properties of AMS-H-6875, various heat treatment processes such as annealing, stress relief, normalization, and ageing can be performed. Heat treatment not only improves the strength and toughness of the material but also enhances its wear resistance and dimensional stability.


AMS-H-6875 material is a high-performance aerospace material widely used in manufacturing critical components for the aerospace industry. This material offers exceptional physical and mechanical properties, ideal for harsh and demanding environments. Not only is the composition of AMS-H-6875 designed to deliver excellent corrosion resistance and increased strength, but it is also easy to machine and process. The usage of AMS-H-6875 in the aerospace industry is not new, but its unique composition and physical and mechanical properties make it a desirable choice.

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