KasperCalc: MIL-HDBK-5 4.2 Magnesium-Wrought Alloys

Chapter 4.2 Contents

4.2Magnesium-Wrought Alloys 4.2.1AZ31B Alloy 4.2.1.0Comments and Properties 4.2.1.1O Temper 4.2.1.2H24 Temper 4.2.1.3H26 Temper 4.2.1.4F Temper 4.2.2AZ61A Alloy 4.2.2.0Comments and Properties 4.2.3ZK60A Alloy 4.2.3.0Comments and Properties 4.2.3.1F Temper 4.2.3.2T5 Temper

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Chapter 1 — General Chapter 2 — Steel Chapter 3 — Aluminum Chapter 4 — Magnesium 4.1 — General 4.2 — Magnesium-Wrought Alloys 4.3 — Magnesium Cast Alloys 4.4 — Element Properties

Disclaimer

For reference use only. The formulas, graphs, and values herein are provided in good faith for general engineering guidance. Please verify all data against MIL-HDBK-5J or the applicable superseding document (MMPDS).

Table of Tables

Table 4.2.1.0(a)Material Specifications for AZ31B Magnesium Alloy Table 4.2.1.0(b)Design Mechanical and Physical Properties of AZ31B Magnesium Alloy Sheet and Plate Table 4.2.1.0(c)Design Mechanical and Physical Properties of AZ31B Magnesium Alloy Plate Table 4.2.1.0(d)Design Mechanical and Physical Properties of AZ31B Magnesium Alloy Extrusion and Forging AZ31B Temper Index Table 4.2.2.0(a)Material Specifications for AZ61A Magnesium Alloy Table 4.2.2.0(b)Design Mechanical and Physical Properties of AZ61A Magnesium Alloy Extrusion and Forging Table 4.2.3.0(a)Material Specifications for ZK60A Magnesium Alloy Table 4.2.3.0(b)Design Mechanical and Physical Properties of ZK60A Magnesium Alloy Extrusion Table 4.2.3.0(c)Design Mechanical and Physical Properties of ZK60A Magnesium Alloy Extrusion and Forging ZK60A Temper Index

Table of Figures

Fig 4.2.1.0Effect of temperature on the physical properties of AZ31B. Fig 4.2.1.1.4Effect of temperature on the tensile modulus (E) of AZ31B-O sheet and plate. Fig 4.2.1.1.6Typical tensile and compressive stress-strain and compressive tangent-modulus curves for AZ31B-O sheet and plate at room temperature. Fig 4.2.1.2.1Effect of temperature on the tensile ultimate strength (F_tu) and the tensile yield strength (F_ty) of AZ31B-H24 sheet and plate. Fig 4.2.1.2.2Effect of temperature on the compressive yield strength (F_cy) and the shear ultimate strength (F_su) of AZ31B-H24 sheet and plate. Fig 4.2.1.2.3Effect of temperature on the bearing ultimate strength (F_bru) and the bearing yield strength (F_bry) of AZ31B-H24 sheet and plate. Fig 4.2.1.2.4Effect of temperature on the tensile modulus (E) of AZ31B-H24 sheet and plate. Fig 4.2.1.2.6Typical tensile and compressive stress-strain and compressive tangent-modulus curves for AZ31B-H24 sheet at room temperature.

Table of Figures (cont.)

Fig 4.2.1.4.8(a)Best-fit S/N curves for unnotched AZ31B-F magnesium alloy forged disk, transverse direction. Product form: forged disk, 1 inch thick (T_US = 38 ksi, T_YS = 26 ksi, room temperature); unnotched specimen, 0.75-inch gross diameter, 0.30-inch net diameter; axial loading, 1500 cpm, air environment; sample size 194. Reference 4.2.1.1.8. Fig 4.2.1.4.8(b)Best-fit S/N curves for notched, K_t = 3.3, AZ31B-F magnesium alloy forged disk, transverse direction. Product form: forged disk, 1 inch thick (T_US = 38 ksi, T_YS = 26 ksi, room temperature); notched specimen, K_t = 3.3, 0.350-inch gross diameter, 0.280-inch net diameter, 0.010-inch root radius, 60° flank angle; axial loading, 1500 cpm, air environment; sample size 34. Reference 4.2.1.1.8. Fig 4.2.3.0Effect of temperature on the physical properties of ZK60A magnesium alloy. Fig 4.2.3.2.6(a)Typical tensile stress-strain curve for ZK60A-T5 extrusion at room temperature. Ramberg-Osgood n (RT) = 7.0. Fig 4.2.3.2.6(b)Typical compressive stress-strain curve for ZK60A-T5 extrusion at room temperature. Fig 4.2.3.2.8(a)Best-fit S/N curves for unnotched ZK60A-T5 extruded bar, longitudinal direction. Product form: extruded bar, 0.50-inch diameter (T_US = 47.5 ksi, T_YS = 40.9 ksi, room temperature, unnotched); unnotched specimen, 0.500-inch gross diameter, 0.400-inch net diameter, 0.750-inch root diameter, 7.500 inches long; axial loading, 3600 cpm, room temperature, air environment; sample size 21. Reference 4.2.3.2.8. Fig 4.2.3.2.8(b)Best-fit S/N curves for notched, K_t = 2.4, ZK60A-T5 extruded bar, longitudinal direction. Product form: extruded bar, 0.50-inch diameter (T_US = 63.7 ksi, T_YS = 40.9 ksi, room temperature, notched); circumferentially notched specimen, K_t = 2.4, 0.500-inch gross diameter, 0.400-inch net diameter, 0.032-inch notch radius, 60° flank angle; axial loading, 3600 cpm, room temperature, air environment; sample size 30. Reference 4.2.3.2.8. Fig 4.2.3.2.8(c)Best-fit S/N curves for notched, K_t = 3.4, ZK60A-T5 extruded bar, longitudinal direction. Product form: extruded bar, 0.50-inch diameter (T_US = 58.2 ksi, T_YS = 40.9 ksi, room temperature, notched); circumferentially notched specimen, K_t = 3.4, 0.500-inch gross diameter, 0.400-inch net diameter, 0.010-inch notch radius, 60° flank angle; axial loading, 3600 cpm, room temperature, air environment; sample size 36. Reference 4.2.3.2.8.

4.2Magnesium-Wrought Alloys

AZ31B is a wrought magnesium-base alloy in the Section 4.2 Magnesium-Wrought Alloys group, containing aluminum and zinc as the principal alloying elements.

4.2.1AZ31B Alloy

4.2.1.0Comments and Properties

AZ31B is a wrought magnesium-base alloy containing aluminum and zinc. It is available in the form of sheet, plate, extruded sections, forgings, and tubes. AZ31B has good room-temperature strength and ductility and is used primarily for applications where the temperature does not exceed 300°F. Increased strength is obtained in the sheet and plate form by strain hardening with a subsequent partial anneal (H24 and H26 temper). No treatments are available for increasing the strength of this alloy after fabrication.

Forming of AZ31B must be done at elevated temperatures if small radii or deep draws are required. If the temperatures used are too high or the times too great, H24 and H26 temper material will be softened. This alloy is readily welded but must be stress relieved after welding to prevent stress corrosion cracking.

Material specifications covering AZ31B wrought products are given in Table 4.2.1.0(a). Room-temperature mechanical and physical properties are shown in Tables 4.2.1.0(b) through (d). The effect of temperature on physical properties is shown in Figure 4.2.1.0.

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Table 4.2.1.0(a). Material Specifications for AZ31B Magnesium Alloy
Specification	Form
AMS 4375	Sheet and plate
AMS 4376	Plate
AMS 4377	Sheet and plate
ASTM B 107	Extrusion
ASTM B 91	Forging

The temper index for AZ31B is as follows:

AZ31B Temper Index
Section	Temper
4.2.1.1	O
4.2.1.2	H24
4.2.1.3	H26
4.2.1.4	F

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Table 4.2.1.0(b). Design Mechanical and Physical Properties of AZ31B Magnesium Alloy Sheet and Plate
Specification	AMS 4375					AMS 4377
Form	Sheet		Plate			Sheet		Plate
Temper	O					H24
Thickness, in.	0.016- 0.060	0.061- 0.249	0.250- 0.500	0.501- 2.000	2.001- 3.000	0.016- 0.062	0.063- 0.249	0.250- 0.374	0.375- 0.500	0.501- 1.000	1.001- 2.000	2.001- 3.000
Basis	S	S	S	S	S	S	S	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	32	32	32	32	32	39	39	38	37	36	34	34
LT	···	···	···	···	···	40	40	39	38	37	35	···
F_ty, ksi:
L	18	15	15	15	15	29	29	26	24	22	20	18
LT	···	···	···	···	···	32	32	29	27	25	23	···
F_cy, ksi:
L	···	12	10	10	8	···	24	20	16	13	10	9
LT^a	···	···	···	···	···	···	···	···	···	···	···	···
F_su, ksi	17	17	17	···	···	18	18	18	18	···	···	···
F_bru^b, ksi:
(e/D = 1.5)	50	50	50	···	···	58	58	56	54	···	···	···
(e/D = 2.0)	60	60	60	···	···	68	68	65	63	···	···	···
F_bry^b, ksi:
(e/D = 1.5)	29	29	27	···	···	43	43	38	34	···	···	···
(e/D = 2.0)	29	29	27	···	···	43	43	38	34	···	···	···
e, percent:
L	12	12	12	10	9	6	6	8	8	8	8	8
E, 10³ ksi	6.5
E_c, 10³ ksi	6.5
G, 10³ ksi	2.4
μ	0.35
Physical Properties:
ω, lb/in.³	0.0639
C, K, and α	See Figure 4.2.1.0
^a F_cy(LT) allowables are equal to or greater than F_cy(L) allowables.
^b Bearing values are “dry pin” values per Section 1.4.7.1.

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Table 4.2.1.0(c). Design Mechanical and Physical Properties of AZ31B Magnesium Alloy Plate
Specification	AMS 4376
Form	Plate
Temper	H26
Thickness, in.	0.250- 0.375	0.376- 0.438	0.439- 0.500	0.501- 0.750	0.751- 1.000	1.001- 1.500	1.501- 2.000
Basis	S	S	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	39	38	38	37	37	35	35
LT	40	39	39	38	38	36	36
F_ty, ksi:
L	27	26	26	25	23	22	21
LT	30	29	29	28	26	25	24
F_cy, ksi:
L	22	21	18	17	16	15	14
LT^a	···	···	···	···	···	···	···
F_su, ksi	18	18	18	···	···	···	···
F_bru^b, ksi:
(e/D = 1.5)	58	56	56	···	···	···	···
(e/D = 2.0)	68	65	65	···	···	···	···
F_bry^b, ksi:
(e/D = 1.5)	40	39	36	···	···	···	···
(e/D = 2.0)	40	39	36	···	···	···	···
e, percent:
L	6	6	6	6	6	6	6
E, 10³ ksi	6.5
E_c, 10³ ksi	6.5
G, 10³ ksi	2.4
μ	0.35
Physical Properties:
ω, lb/in.³	0.0639
C, K, and α	See Figure 4.2.1.0
^a F_cy(LT) allowables are equal to or greater than F_cy(L) values.
^b Bearing values are “dry pin” values per Section 1.4.7.1.

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Table 4.2.1.0(d). Design Mechanical and Physical Properties of AZ31B Magnesium Alloy Extrusion and Forging
Specification	ASTM B 107							ASTM B 91
Form	Extruded bar, rod, and solid shapes				Extruded hollow shapes	Extruded tube		Forging
Temper	F
Thickness, in.	≤0.249	0.250- 1.499	1.500- 2.499	2.500- 4.999	All	0.028- 0.250^b	0.251- 0.750^b	···
Basis	S	S	S	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	35	35	34	32	32	32	32	34
LT	···	···	···	···	···	···	···	···
F_ty, ksi:
L	21	22	22	20	16	16	16	19
LT	···	···	···	···	···	···	···	···
F_cy, ksi:
L	···	12	12	10	10	10	10	···
LT	···	···	···	···	···	···	···	···
F_su, ksi	17	17	17	···	···	···	···	···
F_bru^b, ksi:
(e/D = 1.5)	36	36	36	···	···	···	···	···
(e/D = 2.0)	45	45	45	···	···	···	···	···
F_bry^b, ksi:
(e/D = 1.5)	23	23	23	···	···	···	···	···
(e/D = 2.0)	23	23	23	···	···	···	···	···
e, percent:
L	7	7	7	7	8	8	4	6
E, 10³ ksi	6.5
E_c, 10³ ksi	6.5
G, 10³ ksi	2.4
μ	0.35
Physical Properties:
ω, lb/in.³	0.0639
C, K, and α	See Figure 4.2.1.0
^a Wall thickness for tube; for outside diameter ≤ 6.000 inches.
^b Bearing values are “dry pin” values per Section 1.4.7.1.
Transcription note: the extruded-tube thickness entries carry a superscript b in MIL-HDBK-5J as printed, although footnote a is the wall-thickness note that applies to them. Reproduced as published.

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Figure 4.2.1.0. Effect of temperature on the physical properties of AZ31B.

4.2.1.1AZ31B-O Temper

Effect of temperature on the tensile modulus of sheet and plate is presented in Figure 4.2.1.1.4. Typical room-temperature stress-strain and tangent-modulus curves are presented in Figure 4.2.1.1.6.

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Figure 4.2.1.1.4. Effect of temperature on the tensile modulus (E) of AZ31B-O sheet and plate.

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Figure 4.2.1.1.6. Typical tensile and compressive stress-strain and compressive tangent-modulus curves for AZ31B-O sheet and plate at room temperature.

4.2.1.2AZ31B-H24 Temper

Effect of temperature on the mechanical properties of sheet and plate is shown in Figures 4.2.1.2.1 through 4.2.1.2.4, and 4.2.1.2.6. Typical room-temperature tension and compression stress-strain and tangent-modulus curves for sheet are shown in Figure 4.2.1.2.6.

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Figure 4.2.1.2.1. Effect of temperature on the tensile ultimate strength (F_tu) and the tensile yield strength (F_ty) of AZ31B-H24 sheet and plate.

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Figure 4.2.1.2.2. Effect of temperature on the compressive yield strength (F_cy) and the shear ultimate strength (F_su) of AZ31B-H24 sheet and plate.

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Figure 4.2.1.2.3. Effect of temperature on the bearing ultimate strength (F_bru) and the bearing yield strength (F_bry) of AZ31B-H24 sheet and plate.

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Figure 4.2.1.2.4. Effect of temperature on the tensile modulus (E) of AZ31B-H24 sheet and plate.

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Figure 4.2.1.2.6. Typical tensile and compressive stress-strain and compressive tangent-modulus curves for AZ31B-H24 sheet at room temperature.

4.2.1.3AZ31B-H26 Temper

MIL-HDBK-5J provides no additional narrative for the H26 temper beyond the design property table referenced in Section 4.2.1.0; see Table 4.2.1.0(c) (AZ31B plate, H26 temper).

4.2.1.4AZ31B-F Temper

Figures 4.2.1.4.8(a) and (b) contain fatigue data for forged disk at room temperature.

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Figure 4.2.1.4.8(a). Best-fit S/N curves for unnotched AZ31B-F magnesium alloy forged disk, transverse direction. Product form: forged disk, 1 inch thick (T_US = 38 ksi, T_YS = 26 ksi, room temperature); unnotched specimen, 0.75-inch gross diameter, 0.30-inch net diameter; axial loading, 1500 cpm, air environment; sample size 194. Reference 4.2.1.1.8.

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Figure 4.2.1.4.8(b). Best-fit S/N curves for notched, K_t = 3.3, AZ31B-F magnesium alloy forged disk, transverse direction. Product form: forged disk, 1 inch thick (T_US = 38 ksi, T_YS = 26 ksi, room temperature); notched specimen, K_t = 3.3, 0.350-inch gross diameter, 0.280-inch net diameter, 0.010-inch root radius, 60° flank angle; axial loading, 1500 cpm, air environment; sample size 34. Reference 4.2.1.1.8.

4.2.2AZ61A Alloy

4.2.2.0Comments and Properties

AZ61A is a wrought magnesium-base alloy containing aluminum and zinc. It is available in the form of extruded sections, tubes, and forgings in the as-fabricated (F) temper. AZ61A is much like AZ31B in general characteristics. The increased aluminum content increases the strength and decreases the ductility slightly.

Severe forming must be done at elevated temperatures. This alloy is readily welded but must be stress relieved after welding to prevent stress corrosion cracking.

Material specifications covering AZ61A are given in Table 4.2.2.0(a). Room-temperature mechanical and physical properties are shown in Table 4.2.2.0(b).

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Table 4.2.2.0(a). Material Specifications for AZ61A Magnesium Alloy
Specification	Form
AMS 4350	Extrusion
ASTM B 91	Forging

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Table 4.2.2.0(b). Design Mechanical and Physical Properties of AZ61A Magnesium Alloy Extrusion and Forging
Specification	AMS 4350					ASTM B 91
Form	Extruded bar, rod, and solid shapes			Extruded hollow shapes	Extruded tube	Forging
Temper	F
Thickness, in.	≤0.249	0.250- 2.499	2.500- 4.499^a	All	0.028- 0.750^b	···
Basis	S	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	38	40	40	36	36	38
LT	···	···	···	···	···	···
F_ty, ksi:
L	21	24	22	16	16	22
LT	···	···	···	···	···	···
F_cy, ksi:
L	14	14	14	11	11	14
LT	···	···	···	···	···	···
F_su, ksi	19	19	···	···	···	19
F_bru^c, ksi:
(e/D = 1.5)	45	45	···	···	···	50
(e/D = 2.0)	55	55	···	···	···	60
F_bry^c, ksi:
(e/D = 1.5)	28	28	···	···	···	28
(e/D = 2.0)	32	32	···	···	···	32
e, percent:
L	8	9	7	7	7	6
E, 10³ ksi	6.3
E_c, 10³ ksi	6.3
G, 10³ ksi	2.4
μ	0.31
Physical Properties:
ω, lb/in.³	0.0647
C, Btu/(lb)(°F)	0.25 (at 78°F)^d
K, Btu/[(hr)(ft²)(°F)/ft]	46 (212 to 572°F)
α, 10^-6 in./in./°F	14 (65 to 212°F)
^a For cross-sectional area ≤25 square inches.
^b Wall thickness for outside diameters ≤6.000 inches.
^c Bearing values are “dry pin” values per Section 1.4.7.1.
^d Estimated.

4.2.3ZK60A Alloy

4.2.3.0Comments and Properties

ZK60A is a wrought magnesium-base alloy containing zinc and zirconium. It is available as extruded sections, tubes, and forgings. Increased strength is obtained by artificial aging (T5) from the as-fabricated (F) temper. ZK60A has the best combination of high room-temperature strength and ductility of the wrought magnesium-base alloys. It is used primarily at temperatures below 300°F.

ZK60A has good ductility as compared with other high-strength magnesium alloys and can be formed or bent cold into shapes not possible with those alloys having less ductility. It is not considered a weldable alloy.

Material specifications for ZK60A are given in Table 4.2.3.0(a). Room-temperature mechanical and physical properties are shown in Tables 4.2.3.0(b) and (c). Elevated temperature curves for physical properties are shown in Figure 4.2.3.0.

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Table 4.2.3.0(a). Material Specifications for ZK60A Magnesium Alloy
Specification	Form
ASTM B 107	Extrusion
AMS 4352	Extrusion
AMS 4362	Die and hand forgings

The temper index for ZK60A is as follows:

ZK60A Temper Index
Section	Temper
4.2.3.1	F
4.2.3.2	T5

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Table 4.2.3.0(b). Design Mechanical and Physical Properties of ZK60A Magnesium Alloy Extrusion
Specification	ASTM B 107
Form	Extruded rod, bar, and solid shapes				Extruded hollow shapes	Extruded tube
Temper	F
Cross-sectional area, in.²	<2.000	2.000- 2.999	3.000- 4.999	5.000- 39.999	All	≤3.000 in. O.D.
Thickness, in.	All	All	All	All	All	0.028- 0.750 wall
Basis	S	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	43	43	43	43	40	40
LT	···	···	···	···	···	···
F_ty, ksi:
L	31	31	31	31	28	28
LT	···	···	···	···	···	···
F_cy, ksi:
L	27	26	25	20	20	20
LT	···	···	···	···	···	···
F_su, ksi	22	22	22	···	···	···
F_bru^a, ksi:
(e/D = 1.5)	···	···	···	···	···	···
(e/D = 2.0)	70	70	70	···	···	···
F_bry^a, ksi:
(e/D = 1.5)	···	···	···	···	···	···
(e/D = 2.0)	45	45	45	···	···	···
e, percent:
L	5	5	5	4	5	5
E, 10³ ksi	6.5
E_c, 10³ ksi	6.5
G, 10³ ksi	2.4
μ	0.35
Physical Properties:
ω, lb/in.³	0.0659
C, K, and α	See Figure 4.2.3.0
^a Bearing values are “dry pin” values per Section 1.4.7.1.

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Table 4.2.3.0(c). Design Mechanical and Physical Properties of ZK60A Magnesium Alloy Extrusion and Forging
Specification	AMS 4352									AMS 4362
Form	Extruded rod, bar, and solid shapes						Extruded hollow shapes	Extruded tube		Die forging	Hand forging
Temper	T5
Cross-sectional area, in.²	<2.000	2.000- 2.999	3.000- 4.999	5.000- 9.999	10.000- 24.999	25.000- 39.999	All	≤3.000 in. O.D.	3.000- 8.500 in. O.D.	···	···
Thickness, in.	All	All	All	All	All	All	All	0.028- 0.250 wall	0.094- 1.188 wall	≤3.000	≤6.000
Basis	S	S	S	S	S	S	S	S	S	S	S
Mechanical Properties:
F_tu, ksi:
L	45	45	45	45	45	43	46	46	44	42	38
LT	···	···	···	···	···	···	···	···	···	···	···
F_ty, ksi:
L	36	36	36	34	34	31	38	38	33	26	20
LT	···	···	···	···	···	···	···	···	···	···	···
F_cy, ksi:
L	30	28	25	23	22	20	26	26	21	···	···
LT	···	···	···	···	···	···	···	···	···	···	···
F_su, ksi	22	22	22	···	···	···	···	···	···	···	···
F_bru^a, ksi:
(e/D = 1.5)	···	···	···	···	···	···	···	···	···	···	···
(e/D = 2.0)	71	71	71	···	···	···	···	···	···	···	···
F_bry^a, ksi:
(e/D = 1.5)	···	···	···	···	···	···	···	···	···	···	···
(e/D = 2.0)	47	47	47	···	···	···	···	···	···	···	···
e, percent:
L	4	4	4	6	6	6	4	4	4	7	7
E, 10³ ksi	6.5
E_c, 10³ ksi	6.5
G, 10³ ksi	2.4
μ	0.35
Physical Properties:
ω, lb/in.³	0.0659
C, K, and α	See Figure 4.2.3.0
^a Bearing values are “dry pin” values per Section 1.4.7.1.

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alpha

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Figure 4.2.3.0. Effect of temperature on the physical properties of ZK60A magnesium alloy.

4.2.3.1ZK60A-F Temper

MIL-HDBK-5J provides no additional narrative or figures for the F temper beyond the design property table referenced in Section 4.2.3.0; see Table 4.2.3.0(b) (ZK60A extrusion, F temper).

4.2.3.2ZK60A-T5 Temper

Typical room-temperature tension and compression stress-strain curves for extrusions are shown in Figures 4.2.3.2.6(a) and (b). Fatigue curves are presented in Figures 4.2.3.2.8(a) through (c).

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Figure 4.2.3.2.6(a). Typical tensile stress-strain curve for ZK60A-T5 extrusion at room temperature. Ramberg-Osgood n (RT) = 7.0.

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Figure 4.2.3.2.6(b). Typical compressive stress-strain curve for ZK60A-T5 extrusion at room temperature.

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Figure 4.2.3.2.8(a). Best-fit S/N curves for unnotched ZK60A-T5 extruded bar, longitudinal direction. Product form: extruded bar, 0.50-inch diameter (T_US = 47.5 ksi, T_YS = 40.9 ksi, room temperature, unnotched); unnotched specimen, 0.500-inch gross diameter, 0.400-inch net diameter, 0.750-inch root diameter, 7.500 inches long; axial loading, 3600 cpm, room temperature, air environment; sample size 21. Reference 4.2.3.2.8.

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Figure 4.2.3.2.8(b). Best-fit S/N curves for notched, K_t = 2.4, ZK60A-T5 extruded bar, longitudinal direction. Product form: extruded bar, 0.50-inch diameter (T_US = 63.7 ksi, T_YS = 40.9 ksi, room temperature, notched); circumferentially notched specimen, K_t = 2.4, 0.500-inch gross diameter, 0.400-inch net diameter, 0.032-inch notch radius, 60° flank angle; axial loading, 3600 cpm, room temperature, air environment; sample size 30. Reference 4.2.3.2.8.

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Figure 4.2.3.2.8(c). Best-fit S/N curves for notched, K_t = 3.4, ZK60A-T5 extruded bar, longitudinal direction. Product form: extruded bar, 0.50-inch diameter (T_US = 58.2 ksi, T_YS = 40.9 ksi, room temperature, notched); circumferentially notched specimen, K_t = 3.4, 0.500-inch gross diameter, 0.400-inch net diameter, 0.010-inch notch radius, 60° flank angle; axial loading, 3600 cpm, room temperature, air environment; sample size 36. Reference 4.2.3.2.8.

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Chapter 3 (Aluminum)

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