Material selection

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Choose up to three materials. Compare their properties, reference conditions and specification requirements side by side.

47 matching materials

Special Stainless & Iron-Base AlloysUNS S31254View material details
Duplex & Super Duplex Stainless SteelsUNS S31803 / S32205View material details

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Compare Materials: 254 SMO, Duplex 2205
Material254 SMOS31254Duplex 2205S31803 / S32205

Summary

Material familySpecial Stainless & Iron-Base AlloysDuplex & Super Duplex Stainless Steels
Grade / UNSS31254S31803 / S32205

S31803 and S32205 require separate grade identification. This reference supplies main comparison values for S32205 only; dual certification requires documentation.

SummaryA high-molybdenum austenitic stainless steel used in chloride-bearing process environments.A duplex stainless steel combining strength with resistance to chloride-related corrosion.

Performance overview

Material focus6Mo austenitic stainlessDuplex strength and corrosion resistance
Physical referenceNot documented in this referenceNot documented in this reference
Chemical composition
Chemical composition

Composition limits · wt.%

Cr
19.5–20.5
Ni
17.5–18.5
Mo
6.0–6.5
N
0.18–0.25
Cu
0.50–1.0
C
≤0.02
Mn
≤1.0
P
≤0.03
S
≤0.010
Si
≤0.80
Supplied technical reference · Scanned PDF page 2 · printed page 14
Not documented in this reference

Mechanical properties

Reference conditions vary or are incomplete. Read the basis, condition and source for each column; these values do not establish a performance ranking or finished-fastener acceptance values.

Tensile strength≥650 MPa
Catalogue reference minimums
Not documented in this reference
Not documented in this reference
Supplied technical reference · Scanned PDF page 2 · printed page 14
Not documented in this reference
0.2% yield strength≥300 MPa
Catalogue reference minimums
Not documented in this reference
Not documented in this reference
Supplied technical reference · Scanned PDF page 2 · printed page 14
Not documented in this reference
Elongation≥35 %
Catalogue reference minimums
Not documented in this reference
Not documented in this reference
Supplied technical reference · Scanned PDF page 2 · printed page 14
Not documented in this reference
Reference conditions
Data basis
Catalogue reference minimums
Condition
Not documented in this reference
Sample form
Not documented in this reference
Sample size
Not documented in this reference
Test temperature
Not documented in this reference
Test method
Not documented in this reference
Test direction
Not documented in this reference
Elongation gauge length
A5, as labelled in supplied table
Data basis
Catalogue reference minimums
Condition
Not documented in this reference
Sample form
Not documented in this reference
Sample size
Not documented in this reference
Test temperature
Not documented in this reference
Test method
Not documented in this reference
Test direction
Not documented in this reference
Elongation gauge length
A5, as labelled in supplied table

Temperature & corrosion

Evaluate the medium, concentration, impurities, temperature and loading together. A melting point or oxidation reference is not a safe working-temperature limit.

Service conditions to reviewCheck crevices, chloride concentration and temperature.State S31803 or S32205 explicitly; dual certification requires documentation.
Temperature-dependent dataNot documented in this referenceNot documented in this reference

Heat treatment

Delivery condition and heat-treatment requirements are agreed for the requested product form and order.

ConditionNot documented in this referenceNot documented in this reference
Reference treatmentNot documented in this referenceNot documented in this reference

Reference applications

Application examples provide context for review; suitability depends on the actual service conditions.

Reference applicationsSeawater equipment · chemical-process equipmentProcess equipment · marine components

Standards & documentation

Confirm the edition, product form and condition. Material specifications do not establish finished-fastener compliance.

Material specifications by form
  • ASTM A276Bar & shapesS32205 reference shown; specify the required UNS.Supplied technical reference · Scanned PDF page 1 · printed page 13
  • ASTM A240 / ASME SA240Plate, sheet & stripSupplied technical reference · Scanned PDF page 17 · printed page 29
  • GB/T 20878Grade and composition referenceSpecify the applicable revision.Supplied technical reference · Scanned PDF page 17 · printed page 29
Sources
Sources
Sources

Documents for your enquiry

Every BYBOLT delivery includes an MTC / EN 10204 3.1 certificate, heat-number traceability and mechanical testing. Threaded products include sampled GO / NO-GO gauging. Test methods and acceptance criteria follow the agreed specification; PMI, third-party inspection and additional records are agreed separately at quotation.

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