Nickel Selection Guide

Titanium

Nickel

Overview

Grades & Materials

Applications

Products

Standards & Quality

Technical Knowledge

Selection Guide

Stainless

Carbon

Alloy

Copper, Brass and Bronze

Nickel — Selection Guide

This guide helps you quickly choose the right nickel alloy for different conditions such as corrosion, temperature, and pressure. It’s written clearly and has no small icons.

How to Use This Guide

When choosing a nickel alloy, consider:

  • Corrosion type (chlorides, acids, mixed environments)

  • Temperature (normal, high, thermal cycling)

  • Pressure and mechanical load

  • Service time and safety margin

Common Alloy Choices by Service

Nickel 200 / Nickel 201
Used when corrosion is mild or reducing.
Good for alkaline solutions and environments where stainless steel fails.

  • Basic corrosion resistance

  • Good ductility and weldability

  • Solid choice for general chemical service

Alloy 600 / Alloy 601
Used when high temperature and oxidation resistance are important.

  • Alloy 601 has added aluminum for better cyclic oxidation resistance

  • Good for heaters, furnaces, and high-temperature heat exchangers

Alloy 625
Balanced choice when you need both corrosion resistance and strength.

  • Resists chlorides and stress corrosion cracking

  • Good thermal stability and toughness

  • Widely used across chemical, marine, and power applications

Alloy C276
Excellent for mixed and aggressive corrosion where chemistry may change.

  • Strong resistance to pitting and crevice corrosion

  • Good general corrosion performance in acids

  • One of the most corrosion-resistant nickel alloys

Alloy C22
Used when maximum corrosion margin is required.

  • Higher resistance to pitting and crevice corrosion than many other alloys

  • Good choice for highly aggressive chloride and mixed media service

Alloy B2 (Ni–Mo)
Used in strong reducing acid environments (e.g., hydrochloric acid).

  • Excellent resistance to reducing acids

  • Not designed for high-temperature oxidation resistance

Alloy 800 Series (800 / 800H / 800HT)
Used when high temperature strength and creep resistance are important.

  • Good performance in steam, heaters, and pressure systems

  • Higher carbon/controlled chemistry improves creep strength

Simple Decision Path

Is corrosion dominated by strong acids or chlorides?
→ C276 or C22

Is heat and oxidation resistance needed?
→ Alloy 600 / 601

Do you need a general corrosion + strength balance?
→ Alloy 625

Is service mainly reducing acids?
→ Alloy B2

Is high temperature strength important?
→ 800 Series

Tips for Good Selection

  • Choose the simplest alloy that safely meets conditions

  • Higher alloying (Cr, Mo) generally means better resistance to pitting and crevice corrosion

  • Consider both temperature and corrosion type, not just one factor

  • Always check specific project standards and codes

Summary Table (Quick Reference)

Service ConditionTypical Alloys
Mild corrosion, general serviceNickel 200 / Nickel 201
High temperature & oxidation resistanceAlloy 600 / Alloy 601
Balanced corrosion resistance + strengthAlloy 625
Mixed aggressive corrosionAlloy C276 / Alloy C22
Strong reducing acid environmentsAlloy B2
High temperature + pressure / creep requirementsAlloy 800 / 800H / 800HT

Tips for Better Selection

  • Choose the simplest alloy that safely meets service conditions.

  • More chromium and molybdenum generally improve resistance to pitting and crevice corrosion.

  • Consider both temperature and corrosion type, not just one factor.

Summary

This selection guide gives you a structured way to match service conditions with appropriate nickel alloys. Use it to reduce risk and improve long-term reliability.

Explore next: