Table 2.6.2.0: (a). Effect of Elevated Temperature Exposure on Typical Tensile Properties of AM-355 Alloy in the SCT 850 Condition · MIL-HDBK-5J

Exposure temperature, °F	Exposure stress, ksi	Exposure time, hr	Room-temperature properties
Exposure temperature, °F	Exposure stress, ksi	Exposure time, hr	TUS, ksi	TYS, ksi	e, %
RT			211	170	11.5
600	66	1,000	213	172	12.0
700	65	1,000	218	178	10.5
800	62	1,000	227	200	12.5
600	99	1,000	214	180	10.5
700	97	1,000	218	189	11.5
800	93	1,000	224	204	12.5

Specifications and Properties — Material specifications for AM-355 are presented in Table 2.6.2.0(b). The room temperature properties of AM-355 SCT are shown in Table 2.6.2.0(c) through (e). The physical properties of this alloy are presented in Figure 2.6.2.0.

2.6.2.0 (b). Material Specifications for

AM-355 Stainless Steel

Specification	Form
AMS 5547	Sheet and strip
AMS 5549^a	Plate
AMS 5743	Bar, forging, and forging stock

a Noncurrent specification.

2.6.2.0 (c). Design Mechanical and Physical Properties of AM-355 Stainless Steel

Specification	AMS 5547		AMS 5743
Form	Sheet and strip^a		Bar and forging
Condition	SCT850^b	SCT1000	SCT850^b	SCT1000
Thickness or diameter, in.	0.0005-0.187	0.010-0.187
Basis	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	188		200	170
LT	190	165
F_ty, ksi:
L	162		165	155
LT	165	140
F_cy, ksi:
L	180
LT
F_su, ksi	124
F_bru, ksi:
(e/D = 1.5)
(e/D = 2.0)	383
F_bry, ksi:
(e/D = 1.5)
(e/D = 2.0)	278
e, percent:
L		^c	10	12
LT		10
RA, percent:
L			20	25
E, 10³ ksi		29.0
E, 10³ ksi		29.0
G, 10³ ksi		11.0
μ		0.32
Physical Properties:
ω, lb/in.³		0.282
C, K, and α		See Figure 2.6.2.0

a Test direction longitudinal for widths less than 9 inches; transverse for widths 9 inches and over.

MIL-HDBK-5J

2.6.2.0 (d). Design Mechanical and Physical Properties of AM-355 Stainless Steel Plate

Specification	AMS 5549^a
Form	Plate^b
Condition	SCT850^c			SCT 1000
Thickness, in.	<0.375	0.375-1.000	>1.000	<0.187
Basis	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	188
LT	190	190	190	165
F_ty, ksi:
L	162	150	^d
LT	165	150		140
F_cy, ksi:
L	180
LT
F_su, ksi	124
F_bru, ksi:
(e/D = 1.5)
(e/D = 2.0)	383
F_bry, ksi:
(e/D = 1.5)
(e/D = 2.0)	278
e, percent:
LT	10	10	10	12
E, 10³ ksi	29.0
E_e, 10³ ksi	29.0
G, 10³ ksi	11.0
μ	0.32
Physical Properties:
ω, lb/in.³	0.282
C, K, and a	See Figure 2.6.2.0

a Noncurrent specification.

Table 2.6.2.0(e). Minimum Elongation Values for AM-355 (SCT 850) Stainless Steel Sheet and Strip

Thickness, inches	e (LT), percent in 2 inches
0.0005 to 0.0015	2
Over 0.0015 to 0.0020	3
Over 0.0020 to 0.0050	5
Over 0.0050 to 0.0100	7
Over 0.0100 to 0.1875	8

Properties of SCT850 and SCT1000 Materials Physical Properties vs Temperature Legend

Figure description:

Properties of SCT850 and SCT1000 Materials

Physical Properties vs Temperature

Legend

alpha - Between 70F and indicated temperature — color: black; symbol: Solid line
K - At indicated temperature — color: black; symbol: Solid line
C - At indicated temperature — color: black; symbol: Solid line

Annotations

Vertical reference line at 70 F (vertical_line - position: x = 70)
alpha, SCT850 and SCT1000 label on curve (text_label - position: x = 800, y = 7.8 (alpha scale))
C label on curve (text_label - position: x = 1000, y = 22.5 (K scale))
K label on curve (text_label - position: x = 700, y = 11.5 (K scale))

Temperature (F)	alpha, SCT850 and SCT1000 (10^-6 in./in./F)	C, Btu/(lb(F))	K, Btu/[(hr(ft^2(F/ft)))
-350	4.30	null	null
-300	4.70	null	null
-200	5.30	null	null
-100	5.80	null	null
0	6.20	null	null
70	6.45	null	8.8
200	6.80	null	9.2
400	7.10	0.194	10.0
600	7.35	0.201	10.8
800	7.50	0.208	11.6
1000	7.50	0.218	12.5
1100	7.40	0.222	12.9
1200	7.00	0.226	13.3
1300	6.60	0.230	13.7
1400	6.40	0.233	14.1
1500	6.65	0.236	14.6
1600	7.20	0.238	15.1

Notes: The chart displays three distinct physical properties (C, K, and alpha for SCT850 and SCT1000 materials across a range of temperatures from -400 F to 1600 F. Note that the C and K series share the same graphical grid with different scaled y-axes on the left, while alpha uses the y-axis on the right.)

Figure 2.6.2.0. Effect of temperature on the physical properties of AM-355 stainless steel.