Entries by LKALLOY

17-7PH hardening (RH950) low temperature quenching + aging

17-7PH or Type 631 (UNS S17700) is a chromium-nickel aluminum precipitation hardening stainless steel used for spring applications in numerous industries. 7-7 Precipitation hardening alloys can be formed in the soft austenitic state and hardened to high strength levels by low-temperature heat treatment. The low temperature allows for minimal deformation compared to conventional quench and […]

American scientists discover the highest toughness alloy still has ultra-high performance in extreme cold

The Berkeley National Laboratory in the United States has discovered that an alloy composed of chromium, cobalt, and nickel is the hardest material with the most fracture-resistant properties. The picture shows the nanoscale fracture path and accompanying crystal structure deformation of CrCoNi alloy during the 20 Kelvin stress test. Cracks expand from left to right […]

Welding method of martensitic stainless steel and duplex stainless steel

1. What are martensitic stainless steel and duplex stainless steel? The microstructure is martensitic at room temperature, and its mechanical properties can be adjusted by heat treatment. In layman’s terms, it is a type of hardenable stainless steel. The steel grades belonging to martensitic stainless steel include 1Cr13, 2Cr13, 3Cr13, 4Cr13, 3Cr13Mo, 1Cr17Ni2, 2Cr13Ni2, 9Cr18, […]

Orders from Australian customers

We received the customer’s Round Bar copper-nickel (90/10) inquiry in September, and the agreed delivery time is 20 days. Overall, everything is going according to plan. Unfortunately, the quantity requested by the customer is only 1 of each size. The customer is a careful person and requires samples to be sent first, and the order […]

Corrosion patterns of stainless steel in industrial water systems

1. Corrosion of cooling water to the stainless steel heat exchanger Chromium-nickel steel, especially 18Cr-8Ni austenitic stainless steel, is most widely used in the chemical industry due to its high stability in many chemical media and its ability to resist high-temperature gas corrosion. Although stainless steel has a very low overall corrosion rate in various […]

UNS N09925 Nickel-base Alloy Bar Strength Composition

UNS N09925 alloy is an age-hardenable nickel-iron-chromium alloy. On the basis of nickel-iron-chromium, molybdenum and copper elements are added to strengthen the alloy, which improves the strength and corrosion resistance of the material. The specific chemical composition is as follows. UNS N09925 nickel content is sufficient to prevent chloride ion stress corrosion cracking, molybdenum and […]

How much is 2205 duplex stainless steel per ton?

How much is a ton of 2205 duplex stainless steel? This question is a question that arises from many people who do not know about duplex stainless steel. 2205 duplex stainless steel is a stainless steel in which the ferrite phase and austenite phase coexist, and it is also a steel grade that combines excellent […]