Machinery's Handbook, 31st Edition
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High-Strength, Low-Alloy Steels Table 7. HSLA Steel Grades in Approximate Order of Increasing Excellence Weldability Formability Toughness
980X 970X 965X 960X
980X 970X 965X 960X 955X 950C 950D
980X 970X 965X 960X 955X
↓
955X, 950C, 942X
945C
945C, 950C, 942X
950B, 950X
945X, 950X
945X 950D 950A 945A
950B, 950X, 942X
950D 950B 950A
945C, 945X
950A 945A
(Best) 945A Source: SAE Handbook , 1990. Reprinted with permission. Copyright © 1990. Society of Auto motive Engineers, Inc. All rights reserved. Table 8. Chemical Composition Ladle Analysis of HSLA Steels (max. percent) Grade C Mn P Grade C Mn P 942X 0.21 1.35 0.04 950D 0.15 1.00 0.15 945A 0.15 1.00 0.04 950X 0.23 1.35 0.04 945C 0.23 1.40 0.04 955X 0.25 1.35 0.04 945X 0.22 1.35 0.04 960X 0.26 1.45 0.04 950A 0.15 1.30 0.04 965X 0.26 1.45 0.04 950B 0.22 1.30 0.04 970X 0.26 1.65 0.04 950C 0.25 1.60 0.04 980X 0.26 1.65 0.04 Sulfur, 0.05 percent max; silicon, 0.90 percent max. Source: SAE Handbook , 1990. Reprinted with permission. Copyright © 1990. Society of Auto motive Engineers, Inc. All rights reserved. Table 9. Minimum Mechanical Properties of High-strength Low-alloy Steels
Tensile Strength a (psi) Yield Ultimate
Tensile Strength a (psi) Yield Ultimate
% Elongation 2 in. 8 in.
% Elongation 2 in. 8 in.
Grade
Form
Grade
Form
942X
Plates, shapes, bars To 4 in. incl.
42,000 60,000 24 20 955X Sheet and strip 45,000 60,000 22 … Plates, shapes, bars
55,000 70,000 20 …
945A, C Sheet and strip
Plates, shapes, bars
To 1 1 ⁄ 2 in. incl. 55,000 70,000 … 17
To 1 ⁄ 2 in. incl. 45,000 65,000 22 18 960X Sheet and strip
60,000 75,000 18 …
Plates, shapes, bars
1 ⁄ 2 -1 1 ⁄ 2 in. incl. 42,000 62,000 24 19 1 1 ⁄ 2 -3 in. incl. 40,000 62,000 24 19
To 1 1 ⁄ 2 in. incl. 60,000 75,000 … 16
945X
Sheet and strip Plates, shapes, bars
45,000 60,000 25 … 965X Sheet and strip
65,000 80,000 16 …
Plates, shapes, bars
To 3 ⁄ 4 in. incl. 65,000 80,000 … 15
To 1 1 ⁄ 2 in. incl. 45,000 60,000 22 19
950A, B, C, D Sheet and strip
50,000 70,000 22 … 970X Sheet and strip
70,000 85,000 14 …
Plates, shapes, bars
Plates, shapes, bars
To 1 ⁄ 2 in. incl. 50,000 70,000 22 18
To 3 ⁄ 4 in. incl. 70,000 85,000 … 14
80,000 95,000 12 …
1 ⁄ 2 -1 1 ⁄ 2 in. incl. 45,000 67,000 24 19 980X Sheet and strip
1 1 ⁄ 2 -3 in. incl. 42,000 63,000 24 19
Plates to 3 ⁄ 8 in. incl. 80,000 95,000 … 10
950X
Sheet and strip Plates, shapes, bars
50,000 65,000 22 …
To 1 1 ⁄ 2 in. incl. 50,000 65,000 … 18 a Yield strength to be measured at 0.2 percent offset. Mechanical properties to be determined in accordance with ASTM A370. Source: SAE Handbook , 1990. Reprinted with permission. Copyright © 1990. Society of Auto motive Engineers, Inc. All rights reserved. Typical Mechanical Properties of Steel.— Table 10 through Table 13 provide expected minimum and/or typical mechanical properties of selected standard carbon and alloy steels and stainless steels.
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