Stainless Steel 310 Fasteners

Stainless Steel 310 Fasteners : Manufacturer , Stockist & Supplier : Kinnari Steel

Kinnari Steel Corporation are exporters, stockist & suppliers of Stainless Steel 310 Fasteners.They have special quality finishing and duress for long life, high pressure and zero defects.

Stainless Steel 310 Fasteners

The product differentiation is based on the premier finish of Stainless Steel 310 Fasteners with the minimum burr at the edge . The ends for perfect welding and fabrication of the Wire in mega projects in oil and gas industry for long life of the product.

BACKGROUND

Stainless Steel 310 Fasteners, combining excellent high temperature properties with good ductility and weldability, is designed for high temperature service. It resists oxidation in continuous service at temperatures up to 1150°C provided reducing sulphur gases are not present. It is also used for intermittent service at temperatures up to 1040°C.

Stainless Steel 310 Fasteners (UNS S31008) is used when the application environment involves moist corrodents in a temperature range lower than that which is normally considered “high temperature” service. The lower carbon content of 310S does reduce its high-temperature strength compared to 310.

Like other austenitic grades, these have excellent toughness, even down to cryogenic temperatures, although other grades are normally used in this environment.

Stainless Steel 310 Fasteners (and proprietary versions of this grade), is a 0.03% maximum carbon version of 310, sometimes used for very specific corrosive environments, such as urea production.

STAINLESS STEEL BOLTS

1. Material Grade = A2-70,A4-70,A2-80,A4-80
2. Size Range = M4 to M16.
3. Length = M4-M5 (up to 70mm) M6-M16 (up to 160mm.)

FEATURES

1. Each bundle covered with plastic for protection against extreme weather.
2. Bundles strapped with plastic strips.
3. Each radius of U-Bend tube separated by a separator.
4. Packaging list (laminated) placed with a box.

APPLICATIONS

1. Oil and Gas Pipeline
2. Chemical Industry
3. Plumbing
4. Heating
5. Oil and Gas industry
6. Water supply systems
7. Power Plant
8. Fabrication Industry
9. Heat Exchangers
10. Structural Pipes.

PROPERTIES

These properties are specified for flat rolled product (plate, sheet, and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as pipe and bar in their respective specifications.

Specification

Standard	UNS
SS 310	S31002

Composition

Typical compositional ranges for grade 310 stainless steels are given in table 1.

Table 1. Composition ranges for 310 grade stainless steel

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
310	min.	–	–	–	–	–	24.0	–	19.0	–
310	max.	0.25	2.00	1.50	0.045	0.030	26.0		22.0
310S	min.	–	–	–	–	–	24.0	–	19.0	–
310S	max.	0.25	2.00	1.50	0.045	0.030	26.0		22.0

Mechanical Properties

Typical mechanical properties for grade 310 stainless steels are given in table 2.

Table 2. Mechanical properties of 310 grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B) max	Brinell (HB) max
310	515	205	40	95	217
310S	515	205	40	95	217

Physical Properties

Typical physical properties for annealed grade 310 stainless steels are given in table 3.

Table 3. Physical properties of 310 grade stainless steel in the annealed condition

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (mm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nW.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
310/S	7750	200	15.9	16.2	17.0	14.2	18.7	500	720

Grade Specification Comparison

Approximate grade comparisons for 310 stainless steels are given in table 4.

Table 4. Grade specifications for 310 grade stainless steel

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
Grade	UNS No	BS	BS	No	Name	Swedish SS	Japanese JIS
310	S31000	310S24	–	1.4840	X15CrNi25-20	–	SUH 310
310S	S31008	310S16	–	1.4845	X8CrNi25-21	2361	SUS 310S
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Possible Alternative Grades

Possible alternative grades to grade 310 stainless steels are given in table 5.

Table 5. Possible alternative grades to 310 grade stainless steel

Grade	Why it might be chosen instead of 310
3CR12	Heat resistance is needed, but only to about 600°C.
304H	Heat resistance is needed, but only to about 800°C.
321	Heat resistance is needed, but only to about 900°C. Subsequent aqueous corrosion resistance also required.
253MA (2111HTR)	A slightly higher temperature resistance is needed than can be provided by 310. Better resistance to reducing sulphide atmosphere needed. Higher immunity from sigma phase embrittlement is required.