Q195/Q215A/Q215B Carbon steel angle

Q195, Q215A, and Q215B carbon steel angles are all common carbon structural steel products used in construction. The following is an overview of them:

Q195 Carbon Steel Angle
Definition and Standards: Q195 is a common carbon structural steel that complies with the Chinese standard GB/T 700-2006, “Carbon Structural Steel.” “Q” stands for the initial Chinese pinyin character for “yield,” and “195” indicates the grade has a minimum yield point of 195 MPa.
Chemical Composition: Carbon (C) content 0.06%-0.12%, manganese (Mn) content 0.25%-0.50%, silicon (Si) content ≤0.30%, phosphorus (P) content ≤0.045%, and sulfur (S) content ≤0.050%. Mechanical Properties: Yield strength ≥ 195 MPa (thickness ≤ 16 mm), tensile strength 315-430 MPa, elongation ≥ 33% (gauge length 50 mm).

Characteristics and Applications: It exhibits excellent weldability and plastic deformation properties. It is commonly used in the manufacture of various welded structures, bridge structures, and welded machine structures. It can also be used as rivets, road spikes, and other minor machine parts.

Q215A Carbon Steel Angle

Definition and Standards: Q215A is a carbon structural steel that complies with GB/T 700-1999. Q stands for yield, 215 represents the minimum yield point for this grade, and A indicates the quality grade. Chemical Composition: Carbon (C) ≤ 0.15%, Silicon (Si) ≤ 0.35%, Manganese (Mn) ≤ 1.20%, Phosphorus (P) ≤ 0.045%, Sulfur (S) ≤ 0.050%. Residual chromium, nickel, and copper should each be no more than 0.30%, and nitrogen should be no more than 0.008%.
Mechanical Properties: For thickness or diameter ≤ 16mm, yield strength ≥ 215MPa, tensile strength 335-450MPa.
Characteristics and Applications: High elongation, excellent weldability, and toughness. Commonly used in the manufacture of anchor bolts, rivets, moldboards, chimneys, furnace supports, etc.
Q215B Carbon Steel Angle
Definition and Standards: This steel is the same carbon structural steel as Q215A and complies with GB/T 700-1999. B indicates the quality grade. Its sulfur and phosphorus contents are lower than those of Q215A. Chemical Composition: Carbon (C) ≤ 0.15%, Silicon (Si) ≤ 0.35%, Manganese (Mn) ≤ 1.20%, Phosphorus (P) ≤ 0.045%, Sulfur (S) ≤ 0.045%. Residual chromium, nickel, and copper should each be no more than 0.30%. Nitrogen content should be no more than 0.008%.
Mechanical Properties: Similar to Q215A. For thickness or diameter ≤ 16mm, yield strength ≥ 215MPa, and tensile strength 335-450MPa.
Characteristics and Applications: Due to its lower sulfur content, its performance is slightly better than Q215A, with excellent weldability and toughness. It can be used in applications requiring slightly higher quality, such as building structures and mechanical parts manufacturing.

Parameter Category	Parameter Name	Unit	Description & Typical Range
Basic Identification	Material Grade	—	Carbon steel grade (e.g., ASTM A36, EN 10025-2 S235JR, GB/T 700 Q235B, JIS G3101 SS400)
	Standard Compliance	—	Governing standard (e.g., ASTM A6/A6M, EN 10210-1, GB/T 706, JIS Z3352)
	Channel Type	—	Classification by manufacturing process: – Hot-Rolled Carbon Steel Channel (most common) – Cold-Formed Carbon Steel Channel (for light-duty applications)
Dimensional Parameters	Depth of Channel (h)	mm/inch	Distance from the top of one flange to the top of the opposite flange (cross-sectional height). Typical range: 50–400 mm (2–16 inches) (e.g., C5: 50 mm; C16: 160 mm per ASTM).
	Width of Flange (b)	mm/inch	Width of the horizontal “flange” (the two parallel sides of the “U”). Typical range: 25–150 mm (1–6 inches)
	Thickness of Web (d)	mm/inch	Thickness of the vertical “web” (the middle part of the “U” connecting the two flanges). Typical range: 3–12 mm (0.12–0.47 inches)
	Thickness of Flange (t)	mm/inch	Thickness of the flange (often slightly thicker than the web for structural stability). Typical range: 4–15 mm (0.16–0.59 inches)
	Root Radius (r)	mm/inch	Radius of the curve where the web meets the flange (reduces stress concentration). Typical range: 5–15 mm (0.2–0.6 inches)
	Toe Radius (r₁)	mm/inch	Radius of the outer edge of the flange (improves safety and structural integrity). Typical range: 2–8 mm (0.08–0.31 inches)
	Length (L)	m/ft	Standard length: 6–12 m (20–40 ft); custom lengths available (shortened or extended)
Mechanical Properties	Yield Strength (ReH)	MPa/ksi	Minimum yield strength (varies by grade): – ASTM A36: ≥250 MPa (36 ksi) – S235JR: ≥235 MPa (34 ksi) – Q235B: ≥235 MPa (34 ksi)
	Tensile Strength (Rm)	MPa/ksi	Ultimate tensile strength: – ASTM A36: 400–550 MPa (58–80 ksi) – S235JR: 360–510 MPa (52–74 ksi) – Q235B: 375–500 MPa (54–73 ksi)
	Elongation at Break (A)	%	Minimum elongation (over 50 mm gauge length): – ASTM A36: ≥20% – S235JR: ≥26% – Q235B: ≥26%
	Impact Toughness (Charpy V-Notch)	J	Energy absorbed at specified temperature (varies by grade): – Q235B: ≥27 J at 20°C – Q235D: ≥27 J at -40°C – S235JR: ≥27 J at 20°C
Chemical Composition (Typ.)	Carbon (C)	%	0.17–0.24% (varies by grade; e.g., Q235B: ≤0.22%)
	Manganese (Mn)	%	0.30–1.60% (e.g., ASTM A36: 0.80–1.20%)
	Phosphorus (P)	%	Maximum: 0.045% (to prevent brittleness)
	Sulfur (S)	%	Maximum: 0.045% (to reduce hot cracking)
	Silicon (Si)	%	0.12–0.30% (optional, for deoxidation)
Surface & Finish	Surface Treatment	—	– Mill Finish: As-rolled (with oxide scale, suitable for indoor use) – Hot-Dip Galvanized (HDG): Zn-coating (≥65 μm thickness, for corrosion resistance in outdoor/harsh environments) – Painted: Epoxy or polyester coating
	Surface Quality	—	Free from cracks, folds, delaminations, or excessive scale (per standard requirements; e.g., EN 10025-1 Class A/B)
Weight & Density	Theoretical Weight per Unit Length	kg/m/lb/ft	Calculated based on cross-sectional area (e.g., C10×15.3 ASTM: 15.3 lb/ft ≈22.7 kg/m; Q235B 10# channel: 10.007 kg/m per GB/T 706)
	Density of Carbon Steel	g/cm³	7.85 g/cm³ (standard for carbon steel)

Parameter Category

Parameter Name

Unit

Description & Typical Range

Basic Identification

Material Grade

—

Carbon steel grade (e.g., ASTM A36, EN 10025-2 S235JR, GB/T 700 Q235B, JIS G3101 SS400)

Standard Compliance

—

Governing standard (e.g., ASTM A6/A6M, EN 10210-1, GB/T 706, JIS Z3352)

Channel Type

—

Classification by manufacturing process:
– Hot-Rolled Carbon Steel Channel (most common)
– Cold-Formed Carbon Steel Channel (for light-duty applications)

Dimensional Parameters

Depth of Channel (h)

mm/inch

Distance from the top of one flange to the top of the opposite flange (cross-sectional height).
Typical range: 50–400 mm (2–16 inches) (e.g., C5: 50 mm; C16: 160 mm per ASTM).

Width of Flange (b)

mm/inch

Width of the horizontal “flange” (the two parallel sides of the “U”).
Typical range: 25–150 mm (1–6 inches)

Thickness of Web (d)

mm/inch

Thickness of the vertical “web” (the middle part of the “U” connecting the two flanges).
Typical range: 3–12 mm (0.12–0.47 inches)

Thickness of Flange (t)

mm/inch

Thickness of the flange (often slightly thicker than the web for structural stability).
Typical range: 4–15 mm (0.16–0.59 inches)

Root Radius (r)

mm/inch

Radius of the curve where the web meets the flange (reduces stress concentration).
Typical range: 5–15 mm (0.2–0.6 inches)

Toe Radius (r₁)

mm/inch

Radius of the outer edge of the flange (improves safety and structural integrity).
Typical range: 2–8 mm (0.08–0.31 inches)

Length (L)

m/ft

Standard length: 6–12 m (20–40 ft); custom lengths available (shortened or extended)

Mechanical Properties

Yield Strength (ReH)

MPa/ksi

Minimum yield strength (varies by grade):
– ASTM A36: ≥250 MPa (36 ksi)
– S235JR: ≥235 MPa (34 ksi)
– Q235B: ≥235 MPa (34 ksi)

Tensile Strength (Rm)

MPa/ksi

Ultimate tensile strength:
– ASTM A36: 400–550 MPa (58–80 ksi)
– S235JR: 360–510 MPa (52–74 ksi)
– Q235B: 375–500 MPa (54–73 ksi)

Elongation at Break (A)

Minimum elongation (over 50 mm gauge length):
– ASTM A36: ≥20%
– S235JR: ≥26%
– Q235B: ≥26%

Impact Toughness (Charpy V-Notch)

Energy absorbed at specified temperature (varies by grade):
– Q235B: ≥27 J at 20°C
– Q235D: ≥27 J at -40°C
– S235JR: ≥27 J at 20°C

Chemical Composition (Typ.)

Carbon (C)

0.17–0.24% (varies by grade; e.g., Q235B: ≤0.22%)

Manganese (Mn)

0.30–1.60% (e.g., ASTM A36: 0.80–1.20%)

Phosphorus (P)

Maximum: 0.045% (to prevent brittleness)

Sulfur (S)

Maximum: 0.045% (to reduce hot cracking)

Silicon (Si)

0.12–0.30% (optional, for deoxidation)

Surface & Finish

Surface Treatment

—

– Mill Finish: As-rolled (with oxide scale, suitable for indoor use)
– Hot-Dip Galvanized (HDG): Zn-coating (≥65 μm thickness, for corrosion resistance in outdoor/harsh environments)
– Painted: Epoxy or polyester coating

Surface Quality

—

Free from cracks, folds, delaminations, or excessive scale (per standard requirements; e.g., EN 10025-1 Class A/B)

Weight & Density

Theoretical Weight per Unit Length

kg/m/lb/ft

Calculated based on cross-sectional area (e.g., C10×15.3 ASTM: 15.3 lb/ft ≈22.7 kg/m; Q235B 10# channel: 10.007 kg/m per GB/T 706)

Density of Carbon Steel

g/cm³

7.85 g/cm³ (standard for carbon steel)

Standard & Grade	C (Carbon) (Max. / Typ. %)	Mn (Manganese) (Max. / Typ. %)	Si (Silicon) (Max. / Typ. %)	P (Phosphorus) (Max. %)	S (Sulfur) (Max. %)	Cu (Copper) (Max. / Typ. %)	Other Elements (Max. %)
ASTM A36 (USA)	0.25 / 0.20	1.20 / 1.00	0.40 / 0.25	0.040	0.050	0.20 / —	— (No mandatory limits for Ni, Cr, Mo unless specified)
EN 10025-2 S235JR (EU)	0.17 / 0.15	1.60 / 1.00	0.55 / 0.25	0.045	0.045	0.55 / —	Ni: 0.30; Cr: 0.30; Mo: 0.10; Nb: 0.015
GB/T 700 Q235A (China)	0.22 / 0.20	1.40 / 0.80	0.35 / 0.20	0.045	0.050	— / —	—
GB/T 700 Q235B (China)	0.22 / 0.20	1.40 / 0.80	0.35 / 0.20	0.045	0.045	— / —	—
GB/T 700 Q235D (China)	0.17 / 0.15	1.40 / 0.80	0.35 / 0.20	0.035	0.035	— / —	—
JIS G3101 SS400 (Japan)	0.23 / 0.20	1.60 / 1.00	0.35 / 0.25	0.045	0.045	0.30 / —	Ni: 0.30; Cr: 0.30; Mo: 0.10

Standard & Grade

C (Carbon)
(Max. / Typ. %)

Mn (Manganese)
(Max. / Typ. %)

Si (Silicon)
(Max. / Typ. %)

P (Phosphorus)
(Max. %)

S (Sulfur)
(Max. %)

Cu (Copper)
(Max. / Typ. %)

Other Elements (Max. %)

ASTM A36 (USA)

0.25 / 0.20

1.20 / 1.00

0.40 / 0.25

0.040

0.050

0.20 / —

— (No mandatory limits for Ni, Cr, Mo unless specified)

EN 10025-2 S235JR (EU)

0.17 / 0.15

1.60 / 1.00

0.55 / 0.25

0.045

0.55 / —

Ni: 0.30; Cr: 0.30; Mo: 0.10; Nb: 0.015

GB/T 700 Q235A (China)

0.22 / 0.20

1.40 / 0.80

0.35 / 0.20

0.045

0.050

— / —

—

GB/T 700 Q235B (China)

0.22 / 0.20

1.40 / 0.80

0.35 / 0.20

0.045

— / —

—

GB/T 700 Q235D (China)

0.17 / 0.15

1.40 / 0.80

0.35 / 0.20

0.035

— / —

—

JIS G3101 SS400 (Japan)

0.23 / 0.20

1.60 / 1.00

0.35 / 0.25

0.045

0.30 / —

Ni: 0.30; Cr: 0.30; Mo: 0.10

Standard & Grade	Yield Strength $σ_{s}$ (MPa)	Tensile Strength $σ_{b}$ (MPa)	Elongation $δ_{5}$ (%)	Reduction of Area $ψ$ (%)	Impact Energy $A_{k v}$ (J)	Hardness	Density	Shear Strength	Melting Point
ASTM A36[2,6]	315	400	23	—	—	140HB	7.8 g/cm³	300 MPa	1420 – 1460 °C
EN 10025-2 S235JR	≥235	≥360 – 510	≥26	—	≥27 at 20°C	—	—	—	—
GB/T 700 Q235A[4]	≤16mm: ≥215 16 – 40mm: ≥205 40 – 60mm: ≥195 60 – 100mm: ≥185 100 – 150mm: ≥175 >150mm: ≥165	335 – 450	≤16mm: ≥31 16 – 40mm: ≥30 40 – 60mm: ≥29 60 – 100mm: ≥28 100 – 150mm: ≥27 >150mm: ≥26	—	≥27 at 20°C	—	—	—	—
GB/T 700 Q235B	Similar to Q235A	Similar to Q235A	Similar to Q235A	—	≥27 at 20°C	—	—	—	—
GB/T 700 Q235D	≥235	≥370 – 500	≥22	—	≥27 at -20°C	—	—	—	—
EN 10025-2 S275JR	≥275	≥410 – 560	≥23	—	≥27 at 20°C	—	—	—	—
EN 10025-2 S355JR	≥355	≥470 – 630	≥20	—	≥27 at 20°C	—	—	—	—

Standard & Grade

Yield Strength

σ_{s}

(MPa)

Tensile Strength

σ_{b}

(MPa)

Elongation

δ_{5}

(%)

Reduction of Area

ψ

(%)

Impact Energy

A_{k v}

(J)

Hardness

Density

Shear Strength

Melting Point

ASTM A36[2,6]

315

400

—

140HB

7.8 g/cm³

300 MPa

1420 – 1460 °C

EN 10025-2 S235JR

≥235

≥360 – 510

≥26

—

≥27 at 20°C

—

GB/T 700 Q235A[4]

≤16mm: ≥215
16 – 40mm: ≥205
40 – 60mm: ≥195
60 – 100mm: ≥185
100 – 150mm: ≥175
>150mm: ≥165

335 – 450

≤16mm: ≥31
16 – 40mm: ≥30
40 – 60mm: ≥29
60 – 100mm: ≥28
100 – 150mm: ≥27
>150mm: ≥26

—

≥27 at 20°C

—

GB/T 700 Q235B

Similar to Q235A

—

≥27 at 20°C

—

GB/T 700 Q235D

≥235

≥370 – 500

≥22

—

≥27 at -20°C

—

EN 10025-2 S275JR

≥275

≥410 – 560

≥23

—

≥27 at 20°C

—

EN 10025-2 S355JR

≥355

≥470 – 630

≥20

—

≥27 at 20°C

—

Q195/Q215A/Q215B Carbon steel angle

Carbon steel angle

Product Introduction

Packaging and transportation

8unit in 1*20GP container , 12units in 1*40HQ container, Fumigated wood tray and 10mm wire fixed.

Application Areas

New steel materials are used in food processing, chemical, construction, automotive, marine, and medical industries, offering durability, corrosion resistance, and strength.

Stainless Steel in Construction & Building

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8unit in 120GP container , 12units in 140HQ container, Fumigated wood tray and 10mm wire fixed.