Biotech Steel cold drawn seamless chromoly 4130 tubing is a lighter weight, higher strength alternative to carbon steel. As the market leader in seamless 4130 tubing, Biotech Steel delivers a full range of rounds, squares, rectangles, and streamline products. Our tubing is manufactured to Mil-T-6736B, AMS-T-6736, ASTM A519, and AMS 6360 specifications.

SKU	Description	Manufacture Method	OD	Wall	Specification
35233	SMLS CD 4130 6736 3/8 SQ X .035 WA	SEAMLESS & DRAWN	0.3750	0.0350	AMS6360 P AMS-T-6736
27854	SMLS CD 4130 RD 6736 3/8 X .120	SEAMLESS & DRAWN	0.3750	0.1200	AMS6360 P AMS-T-6736
27374	SMLS CD 4130 RD 6736 3/8 X .083	SEAMLESS & DRAWN	0.3750	0.0830	AMS6360 P AMS-T-6736
27075	SMLS CD 4130 RD 6736 3/8 OD X .065	SEAMLESS & DRAWN	0.3750	0.0650	AMS6360 P AMS-T-6736
26589	SMLS CD 4130 RD 6736 3/8 X .058	SEAMLESS & DRAWN	0.3750	0.0580	AMS6360 P AMS-T-6736
26314	SMLS CD 4130 6736 3/8 X .049	SEAMLESS & DRAWN	0.3750	0.0490	AMS6360 P AMS-T-6736
25872	SCD 4130 RD 6736 3/8 X .035	SEAMLESS & DRAWN	0.3750	0.0350	AMS6360 P AMS-T-6736
25246	SMLS CD 4130 RD 6736 3/8 OD X .028	SEAMLESS & DRAWN	0.3750	0.0280	AMS6360 P AMS-T-6736
35234	SMLS CD 4130 SQ 6736 1/2 SQ X .035	SEAMLESS & DRAWN	0.5000	0.0350	AMS6360 P AMS-T-6736
32837	SMLS CD 4130 6736 1/2 OD X .120 WA	SEAMLESS & DRAWN	0.5000	0.1200	AMS6360 P AMS-T-6736

Advantages Of 4130 tubding

• Excellent weldability
• High yield strength
• High ultimate tensile strength

 

Typical Chemical Composition % (max values, unless noted)
Carbon Max	0.33
Manganese Max	.60
Phosphorous Max	0.025
Sulfur Max	0.025
Silicon Max	0.35
Chromium Range	.80-1.10
Molybdenum Range	.15-.25

 

Typical Mechanical Properties
Tensile Strength Min	90,000 psi
Yield Strength Min	80,000 psi
Elongation Min	10%
Hardness Min	95 HRB

 

Biotech Steel offer as wide range of stock sizes and processing capabilities for your company’s 4130 tubing needs. We stock .1875” OD – 5” OD with wall thicknesses .028” thru .625” wall.