AISI 4140 Qt Steel Round Bar / ASTM A193 B7 Cold Drawn Steel Round Bars with Pitch Size

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Q&T (Quenched & Tempered)
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel, High Strength Bolts
• Model NO.: AISI 4140 / ASTM A193 B7
• Grade: AISI 4140 /A193 B7
• Delivery Condition: Quenched and Tempered
• Sizes: Metric Size or Pitch Size
• MOQ: 2-3tons Per Size (One Bundle )
• Straightness: Max 1mm/M
• Transport Package: Standard Export Packing
• Specification: M12-M100
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

AISI 4140 QT STEEL ROUND BAR / ASTM A193 B7 COLD DRAWN STEEL ROUND BARS WITH PITCH SIZE

ASTM A193 is alloy steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
.
Material according to ASTM A193 B7 is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.

1.Supplied size:

Delivery condition	Diameter ranges
Hot rolled	M12-M310
Hot rolled+Q&T(Quenched and tempered)	M12-M310.
Cold drawn +Q&T(Quenched and tempered)	M10-M100
Peeled / Peeled+Q&T	M10-M100
Forged/Forged+Heat treatment.	M250-M1000

2.Delivery condition
Hot rolled+Q&T
Cold drawn +Q&T
Peeled+Q&T

3.Raw material

Element	B7 (AISI 4140)
Carbon	0.38 - 0.48%
Manganese	0.75 - 1.00%
Phosphorus, max	0.04%
Sulfur, max	0.04%
Silicon	0.15 - 0.35%
Chromium	0.80 - 1.10%
Nickel
Molybdenum	0.15 - 0.25%

4.Property 

Grade	Sizes	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min	HBW	HRC
A193 B7	Up to 2-1/2	125	105	16	50	321 max	35 max
	2-5/8 - 4	115	95	16	50

5.Payment terms: T/T or L/ C
(1)30% paid by T/T and rest 70% by T/T upon the copy of B/B.
(2)100% irrevocable L/C at sight
6.Delivery time:within 7 days after your deposit or L/C.
7.Trade term: FOB CFR CIF
8.Mark: including steel material, heat No., pieces, weight, date and so on.
9.Quality control
1.Process for Steel round bar
Blast Furnance→ Molten Iron Pretreatment→Converter→LF→VD/RH→ContinuousCasting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→Finish Product
EAF→LF→VD/RH→ Continuous Casting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→ Finish Product
2.Grain Sizes:5-8
3.Surface condition: The surface of the bar shall be free cracks, scar and wrinkles at affect the use of the billets. 
4.The mill test certificate shall show the chemical composition, and it is guaranteed that the chemical composition 
shall be within the limit stipulated in the contract