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Product and Application

TruSTRENGTH structural steel flats heat treated to 150 ksi yield strength, as well as other mechanical testing requirements. After heat treatment, product is intended for use in applications requiring a combination of high strength, weldability and toughness.

Available in thickness 1/4” - 2”, widths 3” - 12” and lengths up to 56’.

Mechanical Properties

Yield Strength (0.2%) 150 ksi (1034 MPa)
Tensile Strength 155 - 175 ksi (1069 - 1207 MPa)
Elongation in 2” 13%
Reduction of Area 35%
Charpy V-Notch @ -40° F 15 ft-lbs (20.3 J), average of 3 specimens, longitudinal
Methods Mechanical tests in accordance with ASTM A370, latest revision
Frequency Per heat, per size and per load

* Minimum values unless otherwise noted.

Dimensional Tolerances

Cross-Sectional Dimensions Per ASTM A6, Table 26 (flats)
Length Per ASTM A6, Table 30
Width Per ASTM A6
Straightness 1/8" in 5' maxiumum deviation


Chemical Composition

  C Mn P S Si Cu Ni Cr Mo
Min 0.14 0.90 - - 0.15 - - 0.40 -
Max 0.22 1.55 0.035 0.040 0.40 0.50 0.50 0.70 0.50
CE* (typical): 0.58 *Carbon Equivalency calculated using the following formula:
CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15

Recommended Welding Practices

TruSTRENGTH 150 flat bar can be welded by conventional processes such as SMAW, SAW and GMAW, provided the
weld procedures used are suitable for this grade and design of the welded structure. Proper weld procedures should
include the following:

  1. Low Hydrogen conditions must be used.
  2. Preheating to 200-500 °F is required for heavy section (>0.750”), and is recommended for thinner sections to eliminate moisture.
  3. Slow cooling rates should be avoided to prevent low toughness in the heat-affected zone (HAZ).

*These statements are general guidelines. CMC Impact Metals is not responsible for the results of any welding work performed.

Standard Delivery Conditions

Test Reports

Supplied with shipment for each production lot in the shipment. Reports include description of product and heat treatment processing, and heat number, heat treatment lot and chemical analysis of all elements listed from ladle analysis.

QMS #: TD-CUS-423 | Last Revision: 10/01/2023
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