High Temp Metals 800-500-2141 - Carpenter 310/310S Technical Data

CARPENTER 310/310S TECHNICAL DATA

Type Analysis

Type	Nickel	Chromium	Silicon	Manganese	Carbon	Sulfur	Phosphorus
310	19.00-22.00	24.00-26.00	1.50 max	2.00 max	0.25 max	0.03 max	0.045 max
310S	19.00-22.00	24.00-26.00	1.50 max	2.00 max	0.08 max	0.03 max	0.045 max

Description

Carpenter Stainless Type 310 and 310S are austenitic chromium-nickel stainless steels that have excellent oxidation resistance. These alloys have resisted temperatures up to 2100 °F (1149 °C) in continuous service, and have provided good resistance to both carburizing and reducing environments. Carpenter Stainless Type 310S offers better corrosion resistance than Stainless Type 304 because of the higher percentages of chromium and nickel. Stainless Type 310 and 310S possess much better creep strength at elevated temperatures than do the straight chrome grades.

Corrosion Resistance

Carpenter Stainless Type 310 and 310S have excellent corrosion resistance and are superior to Stainless Type 304 and Type 309 in many environments. Marine exposures have produced little to no evidence of stress corrosion for annealed or cold-rolled Type 310/310S up to 90% of their yield strength. These alloys have excellent resistance to oxiding acids and common corrosion agents. They also have good resistance to molten salts, such as drawing and tempering salts, neutral salts. If used in the temperature range of 800/1500 °F (427/816 °C), Type 310S is suggested for better corrosion resistance. For optimum corrosion resistance, surfaces must be free of scale and foreign particles and finished parts should be passivated.

Scaling

Carpenter Stainless Type 310 possesses excellent scaling resistance up to 2100 °F (1149 °C) if used in continuous service and up to about 2000 °F (1093°C) if used in intermittent heating and cooling. Types 310 and 310S have good resistance to oxidizing and carburizing atmospheres. They have been used in applications involving sulfur-bearing gases at elevated temperature.

Physical Properties

Specific gravity........................................................ 8.00
Density
lb/cu in ................................................................... 0.289
kg/cu m.................................................................... 8000
Mean specific heat
Btu/lb-deg;F(32/212°F)............................................ 0.12
J/kg-K(0/100°F)......................................................... 500
Electrical resistivity (RT)
ohm-cir mil/ft............................................................ 469
microhm-mm ........................................................... 780
Modulus of elasticity (E)
ksi................................................................ 29.0 x 10(3)
MPA............................................................. 200 x 10(3)

Mean coefficient of thermal expansion

Temperature		10(-6)/°F	10(-6)/°C
77°F to	25°C to
212 392 572 752 932 1112 1292 1472 1652 1832	100 200 300 400 500 600 700 800 900 1000	7.7 8.6 9.0 9.4 9.7 9.7 9.9 10.1 10.3 10.5	13.9 15.5 16.2 16.9 17.5 17.5 17.8 18.2 18.6 18.9

Heat Treatment

Annealing
Heat to 1900/2050°F (1038/1121°C) and water quench. Brinell hardness approximately 185.
Hardening
Cannot be hardened by heat treatment. Hardens only by cold working.

Workability

Hot Working
Carpenter Stainless Type 310 can be forged, Carpenter Stainless Types 310 and 310S machine similarly hot headed, and upset satisfactorily. Initial forging temperature should be about 2150°F(1177°C) and forging should not be done much below about 1800°F(982°C). Small forgings should be cooled rapidly in air or water quenched from the hammer. Optimum corrosion resistance is obtained by annealing.

Cold Working
Type 310 can be deep drawn, stamped, headed, and upset without difficulty. Since this steel work hardens, severe forming operations should be followed by an anneal.

Machining
Capenter Stainless Type 310 and Type 310S machine similarly to Stainless Type 305 with a tough, stringy chip. Increased feeds and lower speeds will usually be helpful. The alloys machine quite similarly to copper-nickel type alloys. Types 310 and 310S work harden rapidly and therefore are tough to machine. Machined surface finish can be somewhat improved by using moderately cold-drawn bars.

The following are typical feeds (ipr) and speeds (sfpm) for Carpenter Stainless Types 310 and 310S:

High Speed Tool
Turning- Cut-Off And Forming	Cut-Off Tool Width	1/16"	SFPM IPR	56-85 .001
		1/8"	SFPM IPR	56-85 .0015
		1/4"	SFPM IPR	56-85 .002
		1/2"	SFPM IPR	56-85 .0015
	Form Tool Width	1"	SFPM IPR	56-85 .001
		1-1/2"	SFPM IPR	56-85 .001
Drilling	Drill Dia.	1/4"	SFPM IPR	49-59 .001
		3/4"	SFPM IPR	49-59 .004
Reaming	Under 1/2"		SFPM IPR	70 .003
	Over 1/2"		SFPM IPR	70 .008
Die Threading	T.P.I	3-7½	SFPM	5-10
		8-15	SFPM	8-13
		Over 16	SFPM	10-15
Tapping	SFPM			20
Milling- End Peripheral	Depth of Cut .050	SFPM		70
		IPR		.001-.004
Broaching	SFPM			15
	Chip Load in./tooth			.003

When using carbide tools, surface speed feet/minute (SFPM) can be increased between 2 and 3 times over the high speed suggestions. Feeds can be increased between 50 and 100%.
Figures used for all metal removal operations covered are average. On certain work, the nature of the part may require adjustment of speeds and feeds. Each job has to be developed for best production results with optimum tool life. Speeds or feeds should be increased or decreased in small steps.

Welding
Carpenter Stainless Type 310 and 310S can be satisfactorily welded by the shielded fusion and resistance welding processes. Oxyacetylene welding is not recommended, since carbon pickup in the weld may occur. Since austenetic welds do not harden on air cooling, the welds should have good toughness. When a filter metal is required, AWS E/ER310 welding consumables should be considered. Resistance to intergranular corrosion can be restored by a postwelded annealing treatment.

Typical Mechanical Properties

Typical Room Temperature Mechanical Properties
1" (25.4 mm) round bar, annealed 1950°F (1066°C), water quench

0.2% Yield Strength		Ultimate Tensile Strength		% Elongation in 2" (50.8mm)	% Reduction of Area	Hardness		Impact Strength
ksi	MPa	ksi	MPa			Brinell	Rockwell B	Izod		Charpy V-Notch
								ft/lb	J	ft/lb	J
42	290	91	627	47	70	185	89	90	122	100	136

Typical Elevated Temperature Mechanical Properties
Annealed condition

Test Temperature		0.2% Yield Strength		Ultimate Tensile Strength		% Elongation in 2" (50.8 mm)	% Reduction of Area
°F	°C	ksi	MPa	ksi	MPa	% Elongation in 2" (50.8 mm)	% Reduction of Area
70 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800	21 149 204 260 316 371 427 482 538 593 649 704 760 816 871 927 982	42 35 33 32 30 29 27 27 24 22 21 20 19 18 16 - -	290 241 228 221 207 200 186 186 166 152 145 138 131 124 110 - -	91 88 85 84 82 81 76 75 72 65 56 49 41 34 27 21 13	627 607 586 579 565 558 524 517 496 448 386 338 282 234 186 145 90	47 39 37 37 37 37 36 34 33 33 35 36 37 40 45 50 57	70 70 69 69 69 67 63 61 55 50 45 40 39 38 37 40 40

Typical Creep Strength
Annealed condition

Test Temperature		Stress for 1% elongation in
°F	°C	10,000 hrs		100,000 hrs
		ksi	MPa	ksi	MPa
1000 1100 1200 1300 1400 1500	538 593 649 704 760 816	20 15 8 5 2 1	138 103 56 35 14 7	13 8 6 4 2 -	90 56 42 28 14 -

Typical Stress-Rupture Strength
Annealed condition

Test Temperature		Stress for 1% elongation in
°F	°C	1,000 hrs		10,000 hrs		100,000 hrs
		ksi	MPa	ksi	MPa	ksi	MPa
1000 1100 1200 1300 1400 1500 1600 1800	538 593 649 704 760 816 871 982	32 23 16 10 7 5 3 1	221 159 110 69 49 35 21 7	25 16 10 6 4 2 1 -	172 110 69 42 28 14 7 -	18 12 8 5 3 1 - -	124 83 56 35 21 7 - -

310SS - Current Inventory Stock

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