Construction

SAE1078M Hot Rolled High Carbon Steel Plate

DETAILS AND PARAMETERS

TOLERANCES

TECHNICAL SHEET

Product Introduction

SAE1078M High Carbon Steel Plate is renowned for its superior strength and hardness, derived from a relatively high carbon content. This steel plate exhibits excellent wear - resistance, making it an ideal choice for applications that demand durability under friction, such as tool manufacturing, spring production, and the fabrication of wear - resistant components. Its mechanical properties enable it to withstand significant stress, while its relatively low ductility and toughness should be considered in design and usage.

Production Process

Applications

Industry/Sector	Specific Applications
Automotive	- Suspension springs, valve springs - Transmission gears - Brake discs/pads
Industrial Machinery	- Saw blades, shear tools - Agricultural plow blades, harvester components - Conveyor wear plates, rollers
Manufacturing & Tooling	- Stamping dies, punches - Casting molds - Precision jigs and fixtures
Construction & Mining	- Excavator wear liners - Crusher components - Heavy machinery connectors
Consumer & Tools	- Hammers, chisels, axes - Fitness equipment structural parts - Outdoor tools (e.g., shovel blades)

Packaging

FAQ

Q: What is SAE 1078M?

A: A high carbon steel (0.72–0.86% C) used for applications requiring hardness and wear resistance, such as springs, tools, and dies.

Q: Can it be heat treated?

A: Yes. Quenching + tempering achieves 50–60 HRC for improved strength and wear resistance.

Q: What are the available sizes and tolerances for SAE1078M plates?

A: Typical ranges:

Thickness: 1–100 mm (±0.1–0.5 mm tolerance).

Width: 1000–2500 mm.

Measurement method: direct measurement with digital thickness gauge and at a distance of no less than 1 inch from the edge

Width	Thickness, inches
Width	0.027 a 0.051 inclusive	0.051 a 0.057 inclusive	0.057 a 0.071 inclusive	0071 a 0.098 inclusive	0.098 a 0.18 exclusive	0.18 a 0.23 exclusive
20 - 40 inches inclusive	0.008	0.008	0.009	0.010	0.010	0.012
40 - 48 inches inclusive	0.008	0.009	0.009	0.010	0.012	0.014

Width, mm

Thickness, mm

Hasta 2 mm

De 2 mm - 2.5

mm inclusive

2.5 mm a 4.5

mm exclusive

4.5 mm a 6.0

mm exclusive

1200 a

1500 mm

inclusive

0.26

0.30

0.38

Minimum thickness, mm	Nominal thickness, mm	Maximum thickness, mm
1.47	1.59	1.70
1.47	1.59	1.70
1.47	1.59	1.70
1.47	1.59	1.70
1.47	1.59	1.70
1.89	2.00	2.11
2.25	2.38	2.51
2.25	2.38	2.51
2.25	2.38	2.51
3.02	3.18	3.33
3.02	3.18	3.33
4.58	4.76	4.94
4.64	4.76	4.89
4.61	4.76	4.91
4.58	4.76	4.94
4.56	4.76	4.97
4.56	4.76	4.97
1.87	2.00	2.13
2.85	3.00	3.15

The width tolerance must be according to what is established in table 6 and 7 of the ASTM A568 standard (English System) depending on whether it is a mill edge or cut edge. There is no negative tolerance, only positive.

Width tolerance for mill Edge hot rolled Steel sheet

Width, inches	Upper tolerance, no tolerance under specified width
30 a 50 included	+1 1/8”

Width tolerance for cut Edge for hot rolled Steel sheet

Width, inches	Upper tolerance, no tolerance under specified width
30 to 48 inches (included)	+3/16”

Measurement method: direct measurement using a measuring tape

Hot rolled steel sheet	Minimum width, mm	Nominal width, mm	Maximum width, mm
3' X 6' X 1/16"	914.40	914.40	919.16
3' X 6' X 3/16"	914.40	914.40	919.16
3' X 7' X 1/16"	914.40	914.40	919.16
3' X 8' X 1/16"	914.40	914.40	919.16
3' X 8' X 3/16"	914.40	914.40	919.16
4' X 8' X 1/16"	1219.20	1219.20	1223.96
4' X 8' X 1/8"	1219.20	1219.20	1223.96
4' X 8' X 3/16"	1219.20	1219.20	1223.96
4' X 8' X 2.0mm	1219.20	1219.20	1223.96
4' X 8' X 3.0mm	1219.20	1219.20	1223.96
4' X 8' X 3/32"	1219.20	1219.20	1223.96
4' X 10' X 1/16"	1219.20	1219.20	1223.96
4' X 10' X 1/8"	1219.20	1219.20	1223.96
4' X 10' X 3/16"	1219.20	1219.20	1223.96

The length tolerance must be in accordance with what is established in table 8 of the ASTM A568 standard. There is no negative tolerance, only positive.

Length, inches

Tolerance over, no tolerance under

60 a 120 (included)

(6, 7, 8, 9 y 10 pies)

+ ¾”

Measurement method: direct measurement using a measuring tape

Hot rolled steel sheet	Minimum length, mm	Nominal length, mm	Maximum length, mm
3' X 6' X 1/16"	1828.80	1828.80	1847.85
3' X 6' X 3/16"	1828.80	1828.80	1847.85
3' X 7' X 1/16"	2133.60	2133.60	2152.65
3' X 8' X 1/16"	2438.40	2438.40	2457.45
3' X 8' X 3/16"	2438.40	2438.40	2457.45
4' X 8' X 1/16"	2438.40	2438.40	2457.45
4' X 8' X 1/8"	2438.40	2438.40	2457.45
4' X 8' X 3/16"	2438.40	2438.40	2457.45
4' X 8' X 2.0mm	2438.40	2438.40	2457.45
4' X 8' X 3.0mm	2438.40	2438.40	2457.45
4' X 8' X 3/32"	2438.40	2438.40	2457.45
4' X 10' X 1/16"	3048.00	3048.00	3067.05
4' X 10' X 1/8"	3048.00	3048.00	3067.05
4' X 10' X 3/16"	3048.00	3048.00	3067.05

Maximum straightness should be according to table 10 of ASTM A568 Standard.

Length, feet	Tolerance
4 a 6 (included)	3/16”
6 a 8 (included)	¼”
8 a 10 (included)	5/16”

Method of measurement: According to ASTM A1030/A1030M Standard: Practice for Measuring Flatness Characteristics of Steel Sheet Products

Thickness, inches	Width, inches	Tolerance of flatness
		Minumum yield strength, ksi
		Less than 45	45 to 55	55 to 80	80 to 100
0.057 a 0.18 exclusive (1/16, 1/8, 3/32)	12 a 60 incl.	1 ½	2 ¼	2 ½	2 ¾
	60 a 72 incl. (6 feet)	2 ¼	3 3/8”	3 ½”	3 ¾”
	> 72 incl. (7, 8 y 10 feet)	3	4 ½	4 ¾	5
0.18 a 0.23 exclusive (3/16”)	12 a 60 incl.	1 ½	2 ¼	2 ¼	2 ¾
	60 a 72 incl. (6 feet)	2 ¼	3 3/8	3 3/8	3 ¾
	>72 (7, 8 y 10 pies)	3	4 ½	4 ½	5

Out of square

The out-of-square tolerance must be according to what is indicated in table 11 of the ASTM A568 standard.Out of square is the greatest deviation of the end of the edge from a straight line at right angles to one side touching the corner. It is also obtained by measuring the difference of diagonals. The out of square is half of this difference:The maximum out of square should be 1/16” per 6 inches width, that means, 1/8” / feet of width.

Measurement method: Direct measurement with tape measure