310S Stainless Steel Square Bar | 1.4845 High Temperature Resistant Solid Square Bar ASTM A276 EN10088

Excellent high temperature oxidation resistance up to 1100℃
Stable mechanical performance under continuous high temperature working condition
Great heat resistance for furnace and thermal processing equipment
Solid square profile, easy clamping and machining
Manufactured to ASTM A276 & EN10088 standards

Product Overview

310S Stainless Steel Square Bar (1.4845 / X12CrNi25-21 / SUS310S / 06Cr25Ni20) is high nickel-chromium austenitic stainless steel solid square bar, produced following ASTM A276 and EN10088 standards. It is available in hot rolled and cold drawn types. Hot rolled size range:5×5mm~150×150mm, cold drawn minimum 3×3mm for precision high-temperature components.

High Cr & Ni content endows 310S square bar outstanding high temperature oxidation resistance, can work continuously under high temperature environment. Widely used for furnace parts, heat treatment racks, kiln equipment, high temperature pipeline supports and thermal processing fixtures. Full inspection and MTC provided.

Stainless Steel Square Bar

Chemical & Mechanical Property Snapshot

Grade	Equivalent Brand	C Max	Cr	Ni	Mo	Yield Strength (MPa) Min	Tensile Strength (MPa) Min	Elongation (%) Min	Hardness HB Max
310S	1.4845 / X12CrNi25-21 / SUS310S / 06Cr25Ni20	0.08	24.00-26.00	19.00-22.00	—	205	515	40	217

Detailed Technical Specifications

Item	Specification
Product Name	310S Stainless Steel Square Bar
Material Type	310S High Temperature Austenitic Stainless Steel
Shape	Solid Square Bar
Manufacturing Standards	EN10088, ASTM A276
Production Type	Hot-Rolled Square Bar / Cold-Drawn Square Bar
Hot-Rolled Size Range	5×5mm – 150×150mm
Cold-Drawn Size	Minimum 3×3mm
Available Grade	310S (1.4845)
Surface / Processing	According to production requirements
Material Performance	Excellent high temperature oxidation resistance, stable high-temperature strength
Quality Control	Mill Test Certificate with heat number, chemical composition and mechanical property records
Packaging	Seaworthy bundled packing to prevent scratches and deformation
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit

Size Specification Table

Production Type	Side Dimension	Tolerance	Surface Finish	Length Range
Cold Drawn Stainless Steel Square Bar	3×3 mm–50×50 mm	±0.02–±0.05 mm	Bright polished / Pickled	1000–6000 mm, custom cut
Hot Rolled Stainless Steel Square Bar	5×5 mm–150×150 mm	±0.3–±1.0 mm	Black / Pickled & Passivated	2000–6000 mm, custom cut

Product Comparison Table

Comparison Item	310S Stainless Steel Square Bar	310S Stainless Steel Round Bar	Carbon Steel Square Bar
Material	310S High Temperature Austenitic Stainless Steel	310S High Temperature Austenitic Stainless Steel	Carbon Structural Steel
Cross Section	Solid Square	Solid Round	Solid Square
Main Advantage	Superior high temperature oxidation resistance, stable performance under heat environment	Great circumferential machining, ideal for high temperature rotary shaft parts	Low cost, good weldability for general structural use
Manufacturing Standard	EN10088, ASTM A276	GB/T 1220, ASTM A276, ASTM A484, EN 10088-3	GB/T 706, ASTM A36, EN 10025
Size Range	Cold-drawn: Min.3×3 mm; Hot-rolled:5×5 mm–150×150 mm	Φ3 mm–Φ300 mm	5×5 mm–200×200 mm
Full Available Grades & Equivalent	310S (1.4845/X12CrNi25-21/SUS310S/06Cr25Ni20)	310S (1.4845/X12CrNi25-21/SUS310S/06Cr25Ni20)	Q235B, Q355B, S235JR, S355JR, ASTM A36
Processing Advantage	Pre-shaped square profile, less cutting & shaping work	Suitable for turning, grinding, and shaft manufacturing	Easy cutting, welding & forming
Corrosion Resistance	Good high temperature anti-oxidation, fair room temperature corrosion resistance	Good high temperature anti-oxidation, fair room temperature corrosion resistance	Poor; requires anti-corrosion coating
Typical Applications	Furnace components, heat treatment racks, kiln supports, high temperature fixtures	High temperature furnace rollers, thermal equipment shafts, heat treatment parts	Building supports, general machinery structural parts, brackets

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FAQs

What is equivalent grade of 310S stainless steel square bar?

Equivalent grade: 1.4845, X12CrNi25-21, SUS310S, 06Cr25Ni20.

What is max working temperature of 310S square bar?

Continuous working temperature up to 1100℃, good oxidation resistance under high temperature.

Can 310S square bar be used in furnace?

Yes, it is widely used for furnace linings, support frames and heat treatment baskets.

MOQ for 310S square bar?

MOQ is 5 tons.

What surface options available?

Hot rolled pickled and cold drawn bright finish available.

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310S Stainless Steel Square Bar | 1.4845 High Temperature Resistant Solid Square Bar ASTM A276 EN10088