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Special Stainless & Iron-Base AlloysUNS S31008View material details

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Compare Materials: 310S
Material310SS31008

Summary

Material familySpecial Stainless & Iron-Base Alloys
Grade / UNSS31008
SummaryA high-chromium, high-nickel stainless steel used for oxidation resistance in thermal equipment.

Performance overview

Material focusHeat-resisting austenitic stainless
Physical reference
Density
7.98 g/cm³
Melting range
1395–1435 °C
Supplied technical reference · Scanned PDF page 18 · printed page 30
Chemical composition
Chemical composition

Composition limits · wt.%

Cr
24–26
Ni
19–22
C
≤0.08
Mn
≤2.0
Si
≤1.50
P
≤0.045
S
≤0.030
Supplied technical reference · Scanned PDF page 18 · printed page 30

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≥515 MPa
Catalogue reference minimums
Not documented in this reference
Room temperature
Supplied technical reference · Scanned PDF page 18 · printed page 30
0.2% yield strength≥205 MPa
Catalogue reference minimums
Not documented in this reference
Room temperature
Supplied technical reference · Scanned PDF page 18 · printed page 30
Elongation≥30 %
Catalogue reference minimums
Not documented in this reference
Room temperature
Supplied technical reference · Scanned PDF page 18 · printed page 30
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
Room temperature
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 reviewState the atmosphere and load; oxidation resistance is not an allowable stress.
Temperature-dependent dataNot 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 reference
Reference treatmentNot documented in this reference

Reference applications

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

Reference applicationsFurnace supports · heat-treatment trays

Standards & documentation

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

Material specifications by form
  • GB/T 1220Stainless steel bar referenceCatalogue cites a historical edition; specify the applicable revision.Supplied technical reference · Scanned PDF page 18 · printed page 30
  • ASTM A213 / ASME SA213 TP310SSeamless boiler, superheater & heat-exchanger tubeSupplied technical reference · Scanned PDF page 18 · printed page 30
  • ASTM A240 / ASME SA240Plate, sheet & stripATI · 309 / 310 stainless · Specification coverage for 310S plate, sheet and strip ↗
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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