310S(Cr-Ni)

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1. Introduce

– Stainless steel developed for use in high temperature corrosion resistant applications

– A low carbon version of 310
→ Alloy designed to minimize carbide precipitation and improve weldability

– Excellent oxidation resistance to a temperature range of 1093°C

– UNS S31008

* 310 stainless steel type : related to carbon content

: 310 series is a stainless steel characterized by excellent oxidation resistance up to a temperature range of 1093°C

: Carbon content : Higher carbon content improves creep strength, lower carbon content improves weldability

– 310S : Carbon content 0.08% Maximum

– 310 : Carbon content 0.25% Maximum

– 310H : Carbon content 0.04~0.10% Maximum

* UNS

Abbreviation for the Unified Numbering System for Metals and Alloys
Unified unique numbering system for metals and alloys
A representative number compatible with metals and alloys defined in several material-related codes, including ASTM, AISI, ASME, AWS, etc.

* S : Heat and corrosion resistant (stainless) steel

2. Property

– High temperature corrosion resistance, strength and toughness at cryogenic temperatures, good oxidation resistance

Element	Impact
Cr, Ni	Provides corrosion resistance, sulfidation resistance

[310S Chemical Composition (%)]

C	Mn	P	S
Max. 0.08	Max. 2.00	Max. 0.040	Max. 0.030

Si	Cr	Ni
Max. 1.50	24.0~26.0	19.0~22.0

[310S Mechanical Properties]

Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)
Min. 515	Min. 205	Min. 40

[310S Physical Properties]

Density (g/㎤)	Melting Range (℃)	Specific Heat (0-100℃), J/kg*℃
7.89	1673~1723	490~530

3. Standard & Specification

– Specification : UNS S31008

4. Available Form

– Bar, Rod

– Plate, Sheet, Strip

– Coil, Wire

– Fittings

5. Application & Product

– Chemical, Oil & Coal, Power Generation

Application	Product
Chemical	Heat exchangers, heat treatment equipment
Oil & Coal	Tube hangers for petroleum refining and steam boilers, Coal gasifier internal components, Catalyst recovery systems, Recuperators, Catalytic converters
Power Generation	Coal gasifier internals, Pulverized coal burners