Fastener Guide / Engineering & Failure Analysis

Stress-Corrosion Cracking

SCC is cracking from the combination of tensile stress, a susceptible material and a specific environment. It can fail parts with little visible corrosion.

Last reviewed 2026-09-10 · Governing standard: Materials engineering practice · reference FG-201C86 · Report an error on this sheet

Common SCC combinations

MaterialEnvironment
Austenitic stainless (304 / 316)Chlorides, especially above about 60 C (140 F)
High-strength steelMoist or aqueous environments (overlaps with environmental HE)
BrassAmmonia
Precipitation-hardened alloysChlorides at high hardness

These tables carry the same figures as the printed sheet below.

The printed sheet

Stress-Corrosion Cracking

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Text version of this sheet

Stress corrosion cracking (SCC)

FAILURE MODE

What it is

SCC is cracking from the combination of tensile stress, a susceptible material and a specific

environment. It can fail parts with little visible corrosion.

Stress corrosion: cracks from stress plus

environment

Common SCC combinations

Material

Environment

Austenitic stainless (304 / 316)

Chlorides, especially above about 60 C (140 F)

High-strength steel

Moist or aqueous environments (overlaps with environmental HE)

Brass

Ammonia

Precipitation-hardened alloys

Chlorides at high hardness

Key points

Lowering hardness, changing alloy (e.g. duplex or nickel alloy) or controlling temperature and chlorides are the main fixes.

Governing standards: Materials engineering practice. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always take

precedence over this sheet.

torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability

arising from reliance on this reference.

Fastener Guide reference FG-201C86 · thefastenerapp.com/fastener-guide/failure-analysis/stress-corrosion-cracking · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.

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