Stainless Steel 310
Fasteners & Material Data
UNS S31000
What is 310 stainless steel and its applications?
310 stainless steel (UNS S31000) is a high-chromium, high-nickel austenitic grade used in heat-processing equipment. Typical material applications include furnace parts, burner components and other hardware exposed to hot gases.
- Furnace equipment: Retorts, supports and fixtures exposed to heat.
- Burner assemblies: Components selected for the actual combustion atmosphere.
- Heat-treatment plant: Equipment parts subjected to repeated heating and cooling.
Choose your Stainless Steel 310 product
Engineering Application & Selection Guide
Its chromium-nickel chemistry supports oxidation resistance. Carbon requirements distinguish 310, 310S and 310H, so the unqualified family name does not define a creep-rated fastener condition.
- 310 hex bolts — For heated covers, provide the metal temperature and joint load rather than specifying only the furnace air temperature.
- 310 stud bolts — For sustained hot service, request the design basis for relaxation and creep at the threaded section.
- 310 custom fasteners — For fixtures, show thermal movement and contact with dissimilar materials on the assembly drawing.
Review 310, 310S and 310H differences before approving a substitution. Oxidation resistance and allowable bolting stress answer different questions; neither can be inferred from an alloy family name or a maximum-temperature headline.
Stainless Steel 310 Composition
310 reference limits · wt.% · ATI historical flat-product data
- Cr
- 24–26%
- Ni
- 19–22%
- C
- ≤0.25%
- Mn
- ≤2.00%
- Si
- ≤1.50%
- P
- ≤0.045%
- S
- ≤0.030%
- Fe
- Balance
ASTM / ASME specifications by product form
Finished-product requirements
Specify the finished-fastener mechanical requirements, condition and inspection separately from the starting-stock specification.
Stainless Steel 310 hex bolt requirements ↗Fasteners · dimensional references
| Product | Reference |
|---|---|
| Hex bolts | ISO 4014 / ISO 4017 · ASME B18.2.1 |
| Threaded studs | DIN 976-1 · ASME B18.31.2 |
| Hex nuts | ISO 4032 · ASME B18.2.2 |
| Socket head screws | ISO 4762 · ASME B18.3 |
| Flat washers | ISO 7089 / ISO 7090 · ASME B18.21.1 |
| Custom fasteners | Customer drawing |
Raw-material specifications
| Product form / scope | Reference |
|---|---|
| 310 bar & shapes · Specify S31000, condition and applicable edition. | ASTM A276/A276M |
Dimensions do not define material or finished-part compliance. Specify the grade, condition and applicable requirements.
How to specify round bar, plate, wire and strip ↗Procurement and application guide
Specify the material and final condition
Specify 310, 310S or 310H explicitly. Review atmosphere, temperature cycling and sustained load.
Material forms in the technical reference: Bar · Plate · Sheet · Strip.
Define the finished-part acceptance
Include the material or bolting specification, required final condition, dimensions and quantity. State the service medium, temperature and loading where known. Agree the required tests, inspection coverage and acceptance criteria for the finished part.
Start with the information you have
Send a drawing or share the product form and dimensions. Identify any undecided requirements for review rather than copying a typical property value into the purchase order.
Upload DrawingTechnical guides
All technical articles ↗
310 vs 310S vs 310H: Which Grade Belongs on the Drawing?
High-Temperature Fasteners: Creep and Preload
MTC vs PMI vs Inspection Report: Which One Actually Proves Your Fastener Meets the Order?Selection and specification · 3
Installation and inspection · 3
Quality documents
EN 10204 3.1 MTC
Material certification and heat-number traceability
Mechanical testing
Methods and acceptance criteria follow the agreed specification
Alloy 718 laboratory report · PDF ↗Thread inspection
Sampled GO/NO-GO gauging for threaded products
Additional inspection and records
Heat-treatment records, PMI and third-party scope agreed per order
View PMI sample ↗Specify your Stainless Steel 310 fastener
Sources and references
- ATI · 309 / 310 stainless · Specification coverage for 310S plate, sheet and strip ↗
- Valbruna Slater Stainless · material approval scope · Grade 310 · SA-276/A276 hot-rolled bar; producer scope, not BYBOLT certification ↗
- ASTM · A276/A276M · Public scope · stainless steel bars and shapes; current full grade tables not reproduced ↗
- ASTM · A167 (withdrawn) · Withdrawn 2014, no replacement designated ↗
- Outokumpu Therma range · Material identity, characteristics and application context. ↗
Additional published references
- ASTM A167 — historical plate, sheet & strip specification; withdrawn in 2014, no replacement designated. Do not treat it as an active standard. ASTM · A167 (withdrawn) · Withdrawn 2014, no replacement designated ↗