AISI 1137 round steel bar

AISI 1137 round steel bar


Steel gradeSpecificationProcessing range(mm)
SAE 1137Round barΦ1 to Φ2000
SAE 1137Square-shape steel/Flat bar10 to 1000
SAE 1137Steel Plate/Sheet0.08 to 800(T)*10 to 1500(W)*Long
SAE 1137ForgingPipe/tube/slugs/donuts/cubes/other shapes
SAE 1137TubingOD: Φ4-410; WT: 1-35 mm
SAE 1137Steel coils and stripTHK:0.1mm Width:1500mm


1137 high Strength Chemical Composition
GradeThe Element Max (%)
A29 11370.32-0.391.35-1.650.040.08-0.13


Mechanical Properties
Properties Conditions
T (°C)Treatment
Density (×1000 kg/m3)7.7-8.0325
Poisson's Ratio0.27-0.3025
Elastic Modulus (GPa)190-21025
Tensile Strength (Mpa)584.725annealed at 790°C  more
Yield Strength (Mpa)344.7
Elongation (%)26.8
Reduction in Area (%)53.9
Hardness (HB)17425annealed at 790°C more
Impact Strength (J)
49.925annealed at 790°C  more


Machining performance

AISI 1137 the mechanical properties of the report, the report provides detailed performance analysis and application. 

Principal Design Features

One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.


Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.

Heat Treatment

CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.


Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.


Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.