4140 Steel Plate Products Plate Cutting, Grinding, Machining, Fabricating by Precision Grinding, Inc.
AISI SAE UNS No. C Mn (max) P (max) S (max) Si Cr Mo Hardness Tensile Strength Yield Strength
4140 Steel Plate
Flat Steel Bar
G41400 0.38 - 0.43 0.75 - 1.0 0.035 0.04 0.15 - 0.30 0.8 - 1.1 0.15 - .25 Bhn 195+
RC 22+
98ksi + 58ksi +

4140 PH or 4140 PREHARD has the same industry standard chemistry as above.  4140 Steel Bar    4140 HR Plate
Oil Quenched & Tempered 4140 PH has a standard, industry recognized Rockwell C Hardness rating of 28 - 32.

Most sources recognize and tend to prefer quoting and requesting the Rockwell C Scale. 4140PH ranges from Brinell Hardness 270 - 300.
Thick 4140 AN (in the Annealed condition) is flame cut, then Annealed onsite in our furnace.  Annealing greatly improves Grinding and Machining. Parts can be returned to the standard hardness when followed by a Normalize & Specific Tempering heat treatment process.

Plate Cutting
Annealing
Grinding
CNC Machining
Steel Fabrication

Typical Applications:
Tooling, machine plates, gears, shafts, sprockets, Special Machine Parts
Molds, Metal Stamping, Tool & Die, Shredders
Automotive, Oil & Gas Industries, Machine Shop, Paper Mills

1-888-WE-GRIND
1-205-942-2491 office
1-205-942-2073  FAX
mail@precisiongrinding.com

LANSING plate thicker than 6" - Prior to flame cutting. Large Blanchard Grinding capacity - 128" corner-to-corner swing and up to 45" tall on this grinder   Our newest CNC Machine Large CNC Machine capacity to 31" x 78" x 122" to 22,000 pound weight capacity.
Flame Cutting·Plasma Beveling Precision Grinding 4140 Plate   CNC Machining Steel Parts CNC Machining 4140 Alloy Plate

Hardening Properties

Purchased as Normal HR (hot-roll), Pre-Hardened PH, or in the AN Annealed condition, this chromium molybdenum alloy steel possesses a full range of hardening and wear resistance properties. Combinations of Flame hardening, induction hardening, or oil hardening can considerably increase the wear resistance of the finished ground and machined parts.  Quenching, Normalizing & tempering processes can increase the hardness to the desired level.

4140 Annealing & Stress Relieving

With proper furnace heating techniques, AISI 4140 maintains its properties through exposure to the relatively high heating temperatures during annealing or stress relieving. With an on-site 8' x 8' x 14' car-bottom furnace, Precision Grinding anneals parts cut from 4140 every week. We operate the oven every day of the week, M-F, and heat records are stored for every batch of parts that enter our oven.

Machinability

Parts cut from AISI 4140 Steel are often machined in the Annealed condition, providing for easier machineability. 

Welding Properties

AISI 4140 Steel can be welded, providing the section is preheated during welding, then stress relieved after welding.

Types of Machined Steel Plate Shapes Manufactured from plate and flat bar

Base plates, machine bases, die plates, die shoes, gears, steel molds, platens, sprockets, liners & wear plates

SAE 4140 Steel Plate Inventory / SAE 4140 Bar

Precision Grinding maintains a large inventory of AISI 4140 Plate, 96" x 240" in Standard thicknesses ranging 1/4" - 4", with Availability to 14" thick. We cut, grind, and machine steel parts to your custom specifications.

Grade Decimal
Inches
Fractional
Inches
Metric Grade Decimal
Inches
Fractional
Inches
Metric
SAE 4140 0.375" 3/8" 9.5mm 4140 1.5" 1 1/2" 38mm
4140 0.5" 1/2" 13mm 4140 1.75" 1 3/4" 44mm
4140 0.625" 5/8" 16mm 4140 2.0" 2" 50mm
4140 0.75" 3/4" 19mm 4140 2.25" 2 1/4" 57mm
4140 0.875" 7/8" 22mm 4140 2.5" 2 1/2" 63mm
4140 1.0" 1" 25mm 4140 3.0" 3" 76mm
4140 1.125" 1 1/8" 28mm 4140 3.5" 3 1/2" 89mm
4140 1.25" 1 1/4" 32mm 4140 4.0" 4" 101mm

 In-stock inventory includes: Hot Rolled Carbon Steel Plate & Alloy Plate, Structural Tube, SAE 4140 Bar

A36 A572 Grade 50 A514 T1 1020 1045 Other Available Grades
3/16" - 8" Gr. 50 from 1/2" - 4"  &  Gr. 42 available 4" - 6" 1/4" - 2 1/4" Call 1/2" - 2 1/4" A516 gr 70, 1018, AR400, A2, D2, D7, call
** All of these grades are available in heavier thicknesses. A36 to 24". A514 to 8". 1045 to 14". 4140 to 14". 1020 to 20". A572-50 to 4".

At Precision Grinding, Inc., Birmingham, AL, we manufacture HEAVY steel plate products from plates & bars.
Our steel processing services include:


PLATE CUTTING : Three (480" plus) full sheet cutting tables. Flame Burning and Plasma Burning capacity.
ANNEALING & STRESS RELIEF OVEN :   8' x 8' x 14' capacity
BLANCHARD GRINDING : Large Blanchard Rotary Grinding tables.  Large Mattison Reciprocating Grinders.
LARGE SURFACE GRINDING : Large Mattison Surface Grinders. Max capacity 31"h x 36"w x 173"l
CNC MACHINING
: G&L Mills to 84"h x 60"w x 136" l and CNC Machine Vertical Milling Centers to 31"h x 78"w x 122" l
STEEL FABRICATION : Continuous Stream, Stick, MIG, TIG Welding; Burning; Assembly; Special Machine Building; Weldments.

We offer a complete line of steel processing services. Please, call us at 1-888-934-7463 with your next steel plate request.

Quality Assurance Program

Convenient to I-65 S and I-459, Birmingham, Alabama USA Sitemap Copyright  Oct. 4, 2010 Precision Grinding, Inc. All Rights Reserved.